Angewandte Chemie International Edition

Cover image for Vol. 41 Issue 7

April 2, 2002

Volume 41, Issue 7

Pages 1079–1254

    1. Cover Picture: Angew. Chem. Int. Ed. 7/2002 (page 1079)

      Lawrence Que, Jr. and William B. Tolman

      Version of Record online: 27 MAR 2002 | DOI: 10.1002/1521-3773(20020402)41:7<1079::AID-ANIE1079>3.0.CO;2-7

    2. Graphical Abstract: Angew. Chem. Int. Ed. 7/2002 (pages 1081–1091)

      Version of Record online: 27 MAR 2002 | DOI: 10.1002/1521-3773(20020402)41:7<1081::AID-ANIE1081>3.0.CO;2-G

    3. Molecular Chaperones—Cellular Machines for Protein Folding (pages 1098–1113)

      Stefan Walter and Johannes Buchner

      Version of Record online: 27 MAR 2002 | DOI: 10.1002/1521-3773(20020402)41:7<1098::AID-ANIE1098>3.0.CO;2-9

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      A complex and sophisticated machinery of proteins is involved in cellular protein folding and allows the functional state of proteins to be maintained under conditions in which they would normally unfold and aggregate. The structure of such a system, the small heat-shock protein from the archaeon Methanococcos jannaschii, is depicted. The principle features of these molecular chaperones, their structure–activity relationships, and the underlying molecular mechanisms are discussed in this review.

    4. Bis(μ-oxo)dimetal “Diamond” Cores in Copper and Iron Complexes Relevant to Biocatalysis (pages 1114–1137)

      Lawrence Que, Jr. and William B. Tolman

      Version of Record online: 27 MAR 2002 | DOI: 10.1002/1521-3773(20020402)41:7<1114::AID-ANIE1114>3.0.CO;2-6

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      Diamonds with iron and copper: The recent characterization of metastable iron and copper complexes with the diamond-shaped bis(μ-oxo) core (see picture) has provided new insights into dioxygen activation and catalysis at dimetal sites in proteins. Recent detailed studies have shown that the iron and copper compounds have divergent electronic structures, yet exhibit a number of related structural features, spectroscopic properties, and modes of reactivity.

    5. Chirality of Living Systems: A Helping Hand from Crystals and Oligopeptides (pages 1139–1145)

      Pedro Cintas

      Version of Record online: 27 MAR 2002 | DOI: 10.1002/1521-3773(20020402)41:7<1139::AID-ANIE1139>3.0.CO;2-9

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      Chirality existed before hands developed: Molecular chirality constitutes a fascinating topic linked to the origin of life itself. This minireview highlights some of the recent developments in this area which in part rediscover past reflections and achievements, and approaches the question whether the chirality of living systems arises from subtle quantum–electroweak force effects or from a more familiar chemistry, specifically the chiroselective adsorption of some amino acids onto minerals with enantiomeric faces (see picture).

    6. Electrocyclization of (Z)-1,2,4,6-Heptatetraene and its Heterosubstituted Analogues: Pericyclic or Pseudopericyclic? (pages 1147–1150)

      Jesús Rodríguez -Otero and Enrique M. Cabaleiro-Lago

      Version of Record online: 27 MAR 2002 | DOI: 10.1002/1521-3773(20020402)41:7<1147::AID-ANIE1147>3.0.CO;2-J

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      A reanalysis of the results obtained by Cossío and de Lera et al. show that reactions A and B (see scheme) are essentially pericyclic even though they are favored by the electron lone pair on the heteroatom. This lone pair provides a reaction path with a decreased energy investment but the essential features of the process are typical of a disrotatory electrocyclization as in reaction C.

    7. Reply (pages 1150–1152)

      Angel R. de Lera and Fernando P. Cossio

      Version of Record online: 27 MAR 2002 | DOI: 10.1002/1521-3773(20020402)41:7<1150::AID-ANIE1150>3.0.CO;2-M

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      Different assumptions and considerations used in the calculations of Rodríguez-Otero and Cabaleiro-Lago account for the different interpretations of the mechanism for reactions A and B (see scheme). However, the authors believe that geometric, electronic, orbital, and magnetic criteria indicate that reactions A and B take place by a pseudopericyclic mechanism, whereas the all-carbon equivalent (reaction C) corresponds to a disrotatory (aromatic) electrocyclization.

    8. Fabrication of a Metal-Coated Three-Dimensionally Ordered Macroporous Film and its Application as a Refractive Index Sensor (pages 1153–1156)

      Zhong-Ze Gu, Rumiko Horie, Shoichi Kubo, Yasuhiro Yamada, Akira Fujishima and Osamu Sato

      Version of Record online: 27 MAR 2002 | DOI: 10.1002/1521-3773(20020402)41:7<1153::AID-ANIE1153>3.0.CO;2-4

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      Immobilized gold nanoparticles on a three-dimensionally ordered macroporous (3DOM) film were prepared by a dipping method. The localized surface plasmon resonance of the nanoparticles and the stop-band of the 3DOM film, both still evident after immobilization, are both dependent on the refractive index of the surrounding medium. The picture shows a 3DOM film before (left) and after (right) coating with gold nanoparticles.

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      A One-Dimensional BaI2 Chain with Five- and Six-Coordination, Formed within a Single-Walled Carbon Nanotube (pages 1156–1159)

      Jeremy Sloan, Sara J. Grosvenor, Steffi Friedrichs, Angus I. Kirkland, John L. Hutchison and Malcolm L. H. Green

      Version of Record online: 27 MAR 2002 | DOI: 10.1002/1521-3773(20020402)41:7<1156::AID-ANIE1156>3.0.CO;2-N

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      Unknown in bulk BaI2: Ba coordination numbers of 5 and 6 are present in the one-dimensional (1D) crystal chains formed by BaI2 within single-walled carbon nanotubes (SWNTs). This is revealed by high-resolution transmission electron microscopy images (I). The derived structure model II shows the bond angles measured for equatorial BaI4 units along the central 1D octahedral chain within the BaI2 chain in an SWNT capillary.

    10. Rational Design of Homochiral Solids Based on Two-Dimensional Metal Carboxylates (pages 1159–1162)

      Yong Cui, Owen R. Evans, Helen L. Ngo, Peter S. White and Wenbin Lin

      Version of Record online: 27 MAR 2002 | DOI: 10.1002/1521-3773(20020402)41:7<1159::AID-ANIE1159>3.0.CO;2-5

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      A chiral two-dimensional network is the basis for the structure of a homochiral solid exploiting metal–carboxylate coordination. The synthesis involved enantiopure bridging ligands and metal–organic secondary building units (SBUs), and resulted in ethoxy-protected BINOL functionalities pointing into the cavities in this crystalline chiral zeolitic material (see picture).

    11. Inorganic Chemistry Goes Protein Size: A Mo368 Nano-Hedgehog Initiating Nanochemistry by Symmetry Breaking (pages 1162–1167)

      Achim Müller, Eike Beckmann, Hartmut Bögge, Marc Schmidtmann and Andreas Dress

      Version of Record online: 27 MAR 2002 | DOI: 10.1002/1521-3773(20020402)41:7<1162::AID-ANIE1162>3.0.CO;2-8

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      Molybdenum monsters: A huge molybdenum cluster, comprising large areas with different local symmetry (in the picture different colors represent different (smaller) Mo fragments) is prepared and characterized. Molybdate fragments, which can tolerate a change of electron density at various positions, can be linked in a tremendous variety of ways according to a split-and-link process. Small changes of the boundary conditions, especially the redox conditions, which control growth, as well as the H+ ion concentration, can have a deciding influence on the process.

    12. Ligand-Templated Four-Metal Chains Dimerize into a Unique [CuII8] Cluster (pages 1168–1170)

      Guillem Aromí, Patrick Gamez, Olivier Roubeau, Huub Kooijman, Anthony L. Spek, Willem L. Driessen and Jan Reedijk

      Version of Record online: 27 MAR 2002 | DOI: 10.1002/1521-3773(20020402)41:7<1168::AID-ANIE1168>3.0.CO;2-9

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      A space-ship-like Cu8cluster (see picture) results from the linking of two linear [Cuequation image] units previously assembled through the template action of a pentadentate O ligand. The core of the cluster represents an entirely new topology within the vast family of magnetically coupled Cu aggregates. The alkoxide-bridged octanuclear units are connected to each other by nitrate ligands into an unprecedented cluster polymer.

    13. Calixarene-Type Macrocycles by Oxidation of Phenols Related to Vitamin E (pages 1171–1173)

      Thomas Rosenau, Antje Potthast, Andreas Hofinger and Paul Kosma

      Version of Record online: 27 MAR 2002 | DOI: 10.1002/1521-3773(20020402)41:7<1171::AID-ANIE1171>3.0.CO;2-C

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      It might not be as healthy as vitamin E, but the α-tocopherol derivative 1 undergoes all the typical reactions of the vitamin twice, as a result of its “siamese twin” character. The transformation of 1 in a three-step reaction sequence of oxidation, hetero-Diels–Alder reaction, and reduction provides facile access to tetrameric calixarene-type macrocycles 2.

    14. Natural Product Derived Receptor Tyrosine Kinase Inhibitors: Identification of IGF1R, Tie-2, and VEGFR-3 Inhibitors (pages 1174–1178)

      Petra Stahl, Lars Kissau, Ralph Mazitschek, Athanassios Giannis and Herbert Waldmann

      Version of Record online: 27 MAR 2002 | DOI: 10.1002/1521-3773(20020402)41:7<1174::AID-ANIE1174>3.0.CO;2-V

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      Blood and lymph vessel growth is regulated by Tie-2 and the VEGFR-3 receptor tyrosine kinases. These proteins also play major roles in the growth and metastasis of cancers. A novel class of inhibitors of these signal-transducing proteins, and of the IGF1R kinase (such as 1), is identified from a natural product derived compound library. This discovery opens up new opportunities for the development of antitumor agents.

    15. Selective Direct Synthesis of Organofunctionalized Dialkylgermanes from Solvochemically Activated Germanium (pages 1178–1180)

      Sabine Schlecht

      Version of Record online: 27 MAR 2002 | DOI: 10.1002/1521-3773(20020402)41:7<1178::AID-ANIE1178>3.0.CO;2-7

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      Kinetic inertness overcome: The selective coupling of Ge−E bonds (E=halogen, C) can be achieved at 130°C by direct synthesis from activated germanium. Alkyl bromides with an additional carbonyl function (see scheme) can be converted in a controlled manner into dibromodiorganogermanes.

    16. Beltlike Macrocycles with Four and Eight (Cyclopentadienyl)(cyclobutadienyl)cobalt Building Blocks, Formed by Stepwise Oligomerization of 1,6-Cyclodecadiyne Units (pages 1181–1183)

      Rolf J. Schaller, Rolf Gleiter, Jasmin Hofmann and Frank Rominger

      Version of Record online: 27 MAR 2002 | DOI: 10.1002/1521-3773(20020402)41:7<1181::AID-ANIE1181>3.0.CO;2-A

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      Adjustable belts: Selective synthesis of beltlike cyclophanes containing organometallic π systems is now possible. Intra- and intermolecular ring closure of the flexible ten-membered ring units of 1 leads to tetramer 2 and octamer 3, respectively (see picture; cod=cyclooctadiene).

    17. A trans-Platinum(II) Complex as a Single-Molecule Insulator (pages 1183–1186)

      Marcel Mayor, Carsten von Hänisch, Heiko B. Weber, Joachim Reichert and Detlef Beckmann

      Version of Record online: 27 MAR 2002 | DOI: 10.1002/1521-3773(20020402)41:7<1183::AID-ANIE1183>3.0.CO;2-Z

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      A further component for molecular electronics: A single molecule insulator is realized by immobilizing a platinum(II) complex between two gold electrodes (see picture). The current/voltage characteristics of the setup shows the typical behavior of an insulator with a tunnel barrier height of 2.5 eV.

    18. Intramolecular [3+2] Cycloaddition of a Nitrilium Phosphane Ylide Complex to the P-Phenyl Group of a Wittig Ylide (pages 1186–1188)

      Nils Hoffmann, Peter G. Jones and Rainer Streubel

      Version of Record online: 27 MAR 2002 | DOI: 10.1002/1521-3773(20020402)41:7<1186::AID-ANIE1186>3.0.CO;2-H

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      Terminal addition of an electrophilic phosphanediyl complex to the nitrile-nitrogen atom of a Wittig ylide yields the nitrilium phosphane ylide complex I as an intermediate. Intramolecularly trapping of I by a [3+2] cycloaddition with a P-phenyl group leads to a bowl-shaped, coordinatively bonded, novel tricycle.

    19. Self-Assembly of ZnO: From Nanodots to Nanorods (pages 1188–1191)

      Claudia Pacholski, Andreas Kornowski and Horst Weller

      Version of Record online: 27 MAR 2002 | DOI: 10.1002/1521-3773(20020402)41:7<1188::AID-ANIE1188>3.0.CO;2-5

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      Oriented attachment is the key: Single crystalline ZnO nanorods with lengths up to 500 nm could be prepared in a stepwise manner from quasi-spherical nanoparticles. Only after the formation of pearl-chain-like structures (left), do the aggregated particles fuse upon heating to form nanorods (center and right).

    20. The First “Naked” Primary Phosphanide Anion [ArPH] (pages 1193–1195)

      Valentyn L. Rudzevich, Heinz Gornitzka, Karinne Miqueu, Jean-Marc Sotiropoulos, Geneviève Pfister-Guillouzo, Vadim D. Romanenko and Guy Bertrand

      Version of Record online: 27 MAR 2002 | DOI: 10.1002/1521-3773(20020402)41:7<1193::AID-ANIE1193>3.0.CO;2-X

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      The electronic and steric properties of the 2,6-bis(trifluoromethyl)phenyl (Arf) substituent stabilize a naked dicoordinate phosphorus anion (see scheme) in the primary phosphanide salt [K([15]crown-5)2][ArfPH], both in the solid state and in solution.

    21. Cation-Promoted Hierarchical Formation of Supramolecular Assemblies of Self-Organized Helical Molecular Components (pages 1195–1198)

      Anne Petitjean, Louis A. Cuccia, Jean-Marie Lehn, Hélène Nierengarten and Marc Schmutz

      Version of Record online: 27 MAR 2002 | DOI: 10.1002/1521-3773(20020402)41:7<1195::AID-ANIE1195>3.0.CO;2-L

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      Alternating naphthyridine–pyrimidine strands self-organize into a helical conformation containing a strongly polar cavity. The binding of metal and ammonium cations promotes supramolecular self-assembly in a sort of effector-induced growth process to form polymolecular stacks (see schematic representation) and fibers observable by electron microscopy. Such entities offer features of molecular ion channels.

    22. The Determination of the Absolute Configurations of Diastereomers of (S)-Camphanoyl 3-Hydroxy-5-oxohexanoic Acid Derivatives by X-ray Crystallography (pages 1198–1202)

      Kwai-Ming Cheung, Simon J. Coles, Michael B. Hursthouse, Neil I. Johnson and Peter M. Shoolingin – Jordan

      Version of Record online: 27 MAR 2002 | DOI: 10.1002/1521-3773(20020402)41:7<1198::AID-ANIE1198>3.0.CO;2-3

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      Chirality resolved: The stereochemistry of potential intermediates in the enzymic synthesis of 6-methyl salicylic acid, (R)-1 and (S)-1, has been determined by X-ray crystallography of two corresponding crystalline intermediates (S,S)-2 (shown) and (S,S)-3 (not shown).

    23. A New Mononuclear Iron(III) Complex Containing a Peroxocarbonate Ligand (pages 1202–1205)

      Koji Hashimoto, Shigenori Nagatomo, Shuhei Fujinami, Hideki Furutachi, Seiji Ogo, Masatatsu Suzuki, Akira Uehara, Yonezo Maeda, Yoshihito Watanabe and Teizo Kitagawa

      Version of Record online: 27 MAR 2002 | DOI: 10.1002/1521-3773(20020402)41:7<1202::AID-ANIE1202>3.0.CO;2-E

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      Stabilization of a peroxocarbonate ligand by formation of a five-membered chelate ring. The mononuclear peroxocarbonate complex 1 was prepared by the reaction of a bis(μ-hydroxo)diiron(III) complex with H2O2 and CO2. Compound 1 is the first crystallographically characterized transition metal complex with a peroxocarbonate ligand. Formation of the peroxocarbonate moiety in 1 proceeds by a nucleophilic addition of a peroxide anion to CO2. Hqn=quinaldic acid.

    24. Helical Sense Bias Induced by Point Chirality in Cage Compounds (pages 1205–1208)

      Mateo Alajarín, Carmen López-Leonardo, Angel Vidal, José Berná and Jonathan W. Steed

      Version of Record online: 27 MAR 2002 | DOI: 10.1002/1521-3773(20020402)41:7<1205::AID-ANIE1205>3.0.CO;2-X

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      Highly efficient chirality transfer is employed in controlling the topological asymmetry of chiral cages with propeller-like shape and pseudo C3 symmetry (see picture; R=H, Cl). The cages are formed when two tripodal units (a tribenzylamine and a tris(tertiary phosphane)) become linked by three P=N bonds, by means of a tripod–tripod coupling process followed by a remarkable triple expulsion of molecular nitrogen.

    25. Alkene C−H Activations at Dinuclear Complexes Promoted by Oxidation (pages 1208–1211)

      M. Victoria Jiménez, Eduardo Sola, Javier Caballero, Fernando J. Lahoz and Luis A. Oro

      Version of Record online: 27 MAR 2002 | DOI: 10.1002/1521-3773(20020402)41:7<1208::AID-ANIE1208>3.0.CO;2-F

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      Oxidation favors oxidative addition: This unexpected behavior has been observed in d8d8 ‘open-book' diiridium complexes with alkene ligands, which become C−H activating after oxidation with ferrocinium salts (see scheme).

    26. Bis(1,2,3,4-η4-anthracene)cobaltate(1−) (pages 1211–1215)

      William W. Brennessel, Victor G. Young, Jr. and John E. Ellis

      Version of Record online: 27 MAR 2002 | DOI: 10.1002/1521-3773(20020402)41:7<1211::AID-ANIE1211>3.0.CO;2-I

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      Two remarkable features of bis(anthracene)cobaltate(1−) (see picture) are that it is the first homoleptic anthracene transition metal complex to be prepared by a conventional synthesis, that is, one not involving a metal atom reactor, and it is the first anionic complex of a late (Groups 7–11) transition metal containing only bound aromatic hydrocarbons.

    27. Peptide-Templated Saccharide Synthesis on a Solid Support (pages 1215–1218)

      David R. Greenwell, Abdel F. Ibnouzaki and Stuart L. Warriner

      Version of Record online: 27 MAR 2002 | DOI: 10.1002/1521-3773(20020402)41:7<1215::AID-ANIE1215>3.0.CO;2-V

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      “Zipping up” a carbohydrate can be as simple as glycosidation of sugar units that are attached to a solid-phase bound peptide framework (see schematic presentation). The target disaccharides can be prepared efficiently, and the peptide template was found to influence the stereoselectivity of the glycosidation process.

    28. A New Method for the Synthesis of Cycloheptenones by RhI-Catalyzed Intramolecular Hydroacylation of 4,6-Dienals (pages 1218–1221)

      Yoshihiro Sato, Yoshihiro Oonishi and Miwako Mori

      Version of Record online: 27 MAR 2002 | DOI: 10.1002/1521-3773(20020402)41:7<1218::AID-ANIE1218>3.0.CO;2-D

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      The size of the ring formed in the RhI-catalyzed intramolecular hydroacylation of 4,6-dienals is dependent on the presence of a substituent at C7 and the geometry of the olefin. Cyclization of 4,6-dienals with a substituent at the C7 position (1; R1=alkyl, R2=H) produced cycloheptenones (2) as the major product (see scheme), while that of 4,6-dienals with no substituent at the terminus of the diene (1; R1=H) preferentially gave cyclopentanones. The cyclization of substrates containing a 6E olefin produced cycloheptenones as the major product, while a cyclopentanone was obtained from a substrate having a 6Z olefin. dppe=1,2-bis(diphenylphosphanyl)ethane.

    29. Super-Hydrophobic Surface of Aligned Polyacrylonitrile Nanofibers (pages 1221–1223)

      Lin Feng, Shuhong Li, Huanjun Li, Jin Zhai, Yanlin Song, Lei Jiang and Daoben Zhu

      Version of Record online: 27 MAR 2002 | DOI: 10.1002/1521-3773(20020402)41:7<1221::AID-ANIE1221>3.0.CO;2-G

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      A water contact angle exceeding 170° is exhibited by the surface of aligned polyacrylonitrile (PAN) nanofibers without any surface treatment (the picture shows a cross-sectional view of the as-synthesized nanofibers). The nanofibers were obtained by simply extruding a PAN solution through an anodic alumina template into a solidifying solution. The factors that govern the hydrophobicity of aligned nanostructures are discussed.

    30. A Reactive Intermediate in the Synthesis of Iron Arsenates: Synthesis of the First One-Dimensional Iron Arsenate Oxalate and Its Transformation into Two- and Three-Dimensional Iron Arsenates (pages 1224–1226)

      Sandip Chakrabarti and Srinivasan Natarajan

      Version of Record online: 27 MAR 2002 | DOI: 10.1002/1521-3773(20020402)41:7<1224::AID-ANIE1224>3.0.CO;2-Z

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      Three-dimensions from one: One-dimensional iron arsenate oxalate is prepared, and shown to be reactive, giving rise to a two- and a mixed-valent (FeIII/FeII) three-dimensional iron arsenate structure (see picture). The sequential crystallization provides evidence for the building up of open architectures from low to higher dimensional structures, demonstrating the “life of a chemical system”.

    31. [Zn4(thf)4(MeZn)4(O3SiR)4] (R=2,6-iPr2C6H3N(SiMe3)), A Compound Containing Trigonal-Planar, Tetrahedral, and Trigonal-Bipyramidal Metal Atoms: A New Route to Larger Aggregates (pages 1226–1229)

      Ganapathi Anantharaman, Herbert W. Roesky and Jörg Magull

      Version of Record online: 27 MAR 2002 | DOI: 10.1002/1521-3773(20020402)41:7<1226::AID-ANIE1226>3.0.CO;2-N

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      Zinc atoms in three different geometries and chemically diverse coordination environments are present in the title compound (see structure). This octanuclear zinc siloxane compound was prepared by the addition of excess Me2Zn to RSi(OH)3 (R=2,6-iPr2C6H3N(SiMe3)) (2:1) in THF:hexane at room temperature. This method provides a route to larger aggregates of such compounds.

    32. The Adrenaline Test for Enzymes (pages 1229–1232)

      Denis Wahler and Jean-Louis Reymond

      Version of Record online: 27 MAR 2002 | DOI: 10.1002/1521-3773(20020402)41:7<1229::AID-ANIE1229>3.0.CO;2-5

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      A versatile high-throughput enzyme assay is demonstrated which is based on the colorimetric back-titration of sodium periodate with L-adrenaline (1). Enzyme activity is associated with the depletion of sodium periodate by the reaction product (P), and indicated by the decrease in the amount of the red dye adrenochrome (2) produced by the oxidation of adrenaline by sodium periodate.

    33. Cubane with a Handle: [{In3As4Nb}−As]7− in Cs7NbIn3As5 (pages 1232–1234)

      Franck Gascoin and Slavi C. Sevov

      Version of Record online: 27 MAR 2002 | DOI: 10.1002/1521-3773(20020402)41:7<1232::AID-ANIE1232>3.0.CO;2-8

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      The “uneven” cubane of three indium, four arsenic, and one niobium atom has a handle of a fifth arsenic atom multiply bonded to the niobium corner (see structure).

    34. Surface Structure and Crystal Growth of Zeolite Beta C (pages 1235–1237)

      Ben Slater, C. Richard A. Catlow, Zheng Liu, Tetsu Ohsuna, Osamu Terasaki and Miguel A. Camblor

      Version of Record online: 27 MAR 2002 | DOI: 10.1002/1521-3773(20020402)41:7<1235::AID-ANIE1235>3.0.CO;2-R

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      New insights into crystal growth for zeolite Beta C are shown from simulation studies. Crystal growth may be facilitated by double 4-rings (see picture), giving rise to two distinct external surface topologies. The predictions concur with and explain recent experimental findings and provide evidence that the nanoscopic surface structures arise from complex reactions of siliceous oligomers with the zeolite surface.

    35. Pd-Catalyzed Decarbonylative Olefination of Aryl Esters: Towards a Waste-Free Heck Reaction (pages 1237–1241)

      Lukas J. Gooßen and J. Paetzold

      Version of Record online: 27 MAR 2002 | DOI: 10.1002/1521-3773(20020402)41:7<1237::AID-ANIE1237>3.0.CO;2-F

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      Easy and clean: A palladium(0)-catalyzed decarbonylative Heck olefination of activated esters of aryl, heteroaryl, and vinyl carboxylic acids opens up an opportunity for a novel waste-free Heck olefination process (see scheme).

    36. Electron-Hole Pairs Stabilized in Al-ZSM-5 Zeolites (pages 1241–1244)

      Alain Moissette, Hervé Vezin, Isabelle Gener, Joël Patarin and Claude Brémard

      Version of Record online: 27 MAR 2002 | DOI: 10.1002/1521-3773(20020402)41:7<1241::AID-ANIE1241>3.0.CO;2-C

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      Stabilization of electron-hole pairs for more than 12 months at room temperature was achieved by using biphenyl molecules occluded in the Al-ZSM-5 zeolite type (see picture). The unpaired electrons are localized in the zeolite framework in the vicinity of the occluded biphenyl molecule. Results establish that the trapped electron-hole pair acquires a ferromagnetic ground state.

    37. Book Review: Drug Targeting. Organ-Specific Strategies. Edited by Grietje Molema and Dirk K. F. Meijer (page 1245)

      Ruth Duncan

      Version of Record online: 27 MAR 2002 | DOI: 10.1002/1521-3773(20020402)41:7<1245::AID-ANIE1245>3.0.CO;2-P

    38. Book Review: The Biochemistry of Cell Signalling. By Ernst J. M. Helmreich (pages 1245–1246)

      Christian Herrmann

      Version of Record online: 27 MAR 2002 | DOI: 10.1002/1521-3773(20020402)41:7<1245::AID-ANIE11111245>3.0.CO;2-H

    39. Book Review: Electrochemical Reactions and Mechanisms in Organic Chemistry. By James Grimshaw (pages 1247–1248)

      Bernd Speiser

      Version of Record online: 27 MAR 2002 | DOI: 10.1002/1521-3773(20020402)41:7<1247::AID-ANIE1247>3.0.CO;2-D

    40. Book Review: Encyclopedia of Chromatography. Edited by Jack Cazes (page 1248)

      Thomas Welsch

      Version of Record online: 27 MAR 2002 | DOI: 10.1002/1521-3773(20020402)41:7<1248::AID-ANIE1248>3.0.CO;2-7

    41. Book Review: Principles and Practice of Analytical Chemistry. 5th Edition. By F. W. Fifield and D. Kealey (pages 1249–1250)

      Wolfgang Frenzel

      Version of Record online: 27 MAR 2002 | DOI: 10.1002/1521-3773(20020402)41:7<1249::AID-ANIE1249>3.0.CO;2-1

    42. Book Review: Medicinal Chemistry into the Millennium. Edited by Malcolm M. Campbell and Ian S. Blagbrough (page 1250)

      Thomas Böhme

      Version of Record online: 27 MAR 2002 | DOI: 10.1002/1521-3773(20020402)41:7<1250::AID-ANIE1250>3.0.CO;2-G

    43. Web Site: The Phosphorylation Site Database—A Valuable Tool for Biologists and Biochemists? (page 1251)

      Herbert Waldmann and Lars Kissau

      Version of Record online: 27 MAR 2002 | DOI: 10.1002/1521-3773(20020402)41:7<1251::AID-ANIE1251>3.0.CO;2-A

    44. Preview: Angew. Chem. Int. Ed. 7/2002 (page 1254)

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