Angewandte Chemie International Edition in English

Cover image for Vol. 18 Issue 3

March 1979

Volume 18, Issue 3

Pages 173–238

Currently known as: Angewandte Chemie International Edition

    1. Cover Picture (Angew. Chem. Int. Ed. Engl. 3/1979)

      Article first published online: 22 DEC 2003 | DOI: 10.1002/anie.197901731

    2. Graphical Abstract (Angew. Chem. Int. Ed. Engl. 3/1979)

      Article first published online: 22 DEC 2003 | DOI: 10.1002/anie.197901732

  1. Reviews

    1. Top of page
    2. Reviews
    3. Communications
    4. Book Reviews
    1. Anchimerically Accelerated Bond Homolyses (pages 173–180)

      Doz. Dr. Manfred T. Reetz

      Article first published online: 22 DEC 2003 | DOI: 10.1002/anie.197901733

      Thumbnail image of graphical abstract

      Reactions of the type R1[BOND]a[BOND]b[BOND]R2[RIGHTWARDS ARROW]a[BOND]b[BOND]R1 + R2 are possible provided that the new bond between b and R1 is considerably stronger than the old bond between a and R1, and the radical fragments are resonance stablized

    2. Liquid Column Chromatography with Chemical Derivatizations after Separation. [New analytical methods (15)] (pages 180–186)

      Prof. Dr. Georg Schwedt

      Article first published online: 22 DEC 2003 | DOI: 10.1002/anie.197901801

      Thumbnail image of graphical abstract

      Detection can be considerably improved in high-pressure liquid chromatography (HPCL) by chemical reaction of the separated material particularly if the derivatives can be detected by fluorimetry.

    3. Structural Chemistry of Fluorides and Oxide Fluorides of Nonmetals (pages 186–202)

      Priv.-Doz. Dr. Konrad Seppelt

      Article first published online: 22 DEC 2003 | DOI: 10.1002/anie.197901861

      Thumbnail image of graphical abstract

      This systematic survey of a fascinating area of the chemistry of main group eliments reveals interrelationships and possibilities of predicting the structure (and hence also the reactivity) of hitherto unknown members of the two classes of compounds. The lone pair on the central atom is of great importance for the structures.

    4. Annulenoannulenes (pages 202–214)

      Prof. Dr. Masazumi Nakagawa

      Article first published online: 22 DEC 2003 | DOI: 10.1002/anie.197902021

      Thumbnail image of graphical abstract

      Novel bicyclic hydrocarbons arise formally on fusion of two annulene rings. Most of the partially dehydrogenated annulenoannulenes known so far are stable and admirably suitable for studies on aromaticity.

  2. Communications

    1. Top of page
    2. Reviews
    3. Communications
    4. Book Reviews
    1. Synthesis of 5,5′-Biazulenyl (pages 214–215)

      Dipl.-Chem. Manfred Hanke and Prof. Dr. Christian Jutz

      Article first published online: 22 DEC 2003 | DOI: 10.1002/anie.197902141

      Thumbnail image of graphical abstract

      The directed synthesis of 5,5′-biazulenyl(2) (bluish-black crystals) has been accomplished by Ziegler-Hafner reaction from the pentamethinium salt (1), X[DOUBLE BOND]ClO4, and cyclopentadiene. A dark-red bisfulvene is formed as intermediate.

    2. First Spectroscopic Detection of Diradicals in photocycloreversions (pages 215–217)

      Univ.-Doz. Dr. Gerd Kaupp, Dipl.-Chem. Eberhard Teufel and Prof. Dr. Henning Hopf

      Article first published online: 22 DEC 2003 | DOI: 10.1002/anie.197902151

      Thumbnail image of graphical abstract

      Short-lived photoinetermediates occurring in cycloreversions have now been directly identified as diradicals by spectroscopy. The [6 + 6]-photocycloreversions of the paracyclophanes (1) and (2) serve as examples.

    3. Elemental Sulfur/Alkali Metal Hydroxide/Dimethyl Sulfoxide—A New “Reagent” for Preparing Organic Sulfur compounds (pages 217–218)

      Dr. Andrzej Jończyk

      Article first published online: 22 DEC 2003 | DOI: 10.1002/anie.197902171

      The introduction of the alkylthio group into oraganic compounds previously involved several reaction steps or reagents with RS groups. The reaction shown below proceeds in single step, and S/NaOH(or KOH)/DMSO/RS serves as “reagent”.

      • equation image
    4. Intermolecular Exchange of Substituents via lons (Ion Pairs) in Cyclopentadienyl- and Cyclononatetraenyl-trimethylstannane (pages 218–219)

      Prof. Dr. Gernot Boche, Dipl.-Chem. Frank Heidenhain and Dipl.-Chem. Brigitte Staudigl

      Article first published online: 22 DEC 2003 | DOI: 10.1002/anie.197902181

      Thumbnail image of graphical abstract

      Formation of ion pair by solvation is invoked to explain the 1H-NMR spectral result obtained for (1) and the analogous cyclonatetraene derivative. Thus (1) is capable of not only intramolecular exchange [(1′)(1)] but also intermolecular exchange of substituents (e.g in HMPT as doner solvent[DOUBLE BOND]Do).

    5. “Multi-Loop Crown Ethers” with Multiple Selectivity (pages 219–220)

      Dr. Edwin Weber

      Article first published online: 22 DEC 2003 | DOI: 10.1002/anie.197902191

      Thumbnail image of graphical abstract

      In the crown ether combinations of types(1)and(2), several rings having variable cavity sizes (and soner complements) are linked via spiro-C atoms. These novel complexing agents should be valuable not only for the analysis of mixture of salts but also for enyme-analogous fixation of polyfunctional organic compounds. They might also be of use for simultaneous, and hence profitable, recovery of several precious metals from seawater.

    6. η5-Cyclopentadienyl(trinitrosyl)vanadium Hexafluorophosphate, [CpV(NO)3]PF6 (pages 220–221)

      Prof. Dr. Max Herberhold, Dr. Reinhard Klein and Dr. Paul D. Smith

      Article first published online: 22 DEC 2003 | DOI: 10.1002/anie.197902201

      The series of isosteric half-sandwich compounds of type [CpML3]+ (L[DOUBLE BOND]CO or NO) has now been complied by the synthesis of (1) and is thus available for comparative studies.

      • equation image
    7. Asymmetric Synthesis of 2-Alkylcyclohexanones on Solid Phases (pages 221–222)

      Dr. Paul M. Worster, Dr. Colin R. McArthur and Dr. Clifford C. Leznoff

      Article first published online: 22 DEC 2003 | DOI: 10.1002/anie.197902211

      Thumbnail image of graphical abstract

      Asymmetric syntheses on a kind of “Synthetic enzyme” appear highly promising, as shown by the reaction sequence illustrated below: (S)-2-methyl-and (S)-2-propycyclohexanone have each been obtained in 80% chemical yield and 95 and 60% optical yield, respectively. The chiral reagent (1) can be re-used.

    8. Novel Glycals as Synthons for Saccharide Syntheses (pages 222–223)

      Prof. Dr. Joachim Thiem, Dipl.-Chem. Potra Ossowski and Dipl.-Chem. Jens Schwentner

      Article first published online: 22 DEC 2003 | DOI: 10.1002/anie.197902221

      Thumbnail image of graphical abstract

      Improved saccharide synthese require readily available precursors and a ggod method of linkage. These requirements are fulfilled by the glycals (2) and (3) and their reaction with N-iodosuccinimide (NIS).

    9. Formal Criss-Cross Cycloaddition of Sulfur Trioxide to Cyanogen (page 223)

      Prof. Dr. Herbert W. Roesky, Dipl.-Chem. Nurul Amin, Dr. Graalf Remmers, Dr. habil. Alfred Gieren, Uwe Riemann and Dr. Bernhard Dederer

      Article first published online: 22 DEC 2003 | DOI: 10.1002/anie.197902231

      Thumbnail image of graphical abstract

      A 1,3; 2,4-Cycloadduct with unusual bond lengths is the correct formulation of the product formed form (CN)2 and SO3 (molar ratio 1:2). The extermely long S[BOND]O bonds in the ring and short C[BOND]O and exocyclic S[DOUBLE BOND]O bonds suggest bond-non bond resonance.

    10. Tricyclo[4.2.2.12,5]undeca-3,7,9-triene, the [4+4]-Cyloadduct of Benzene and Cyclopentadiene. Reaction Sequence of Its Retro-Cleavage (pages 224–225)

      Dr. Wolfram Grimme, Dr. Wolfgang Mauer and Dipl.-Chem. Gerd Reinhardt

      Article first published online: 22 DEC 2003 | DOI: 10.1002/anie.197902241

      Thumbnail image of graphical abstract

      The “forbidden” [4+4]-cycloreversion of the highly strained cycloadduct(1) proceeds stepwise. This reaction sequence underscores the energetic advantage of sychronous transition states over a diradical.

    11. Molecular Structure of Phe2-TRH, an Analogue of Thyrotropin-Releasing Hormone (pages 225–226)

      Dr. John J. Stezowski, Dipl.-Chem. Claus Bürvenich and Prof. Dr. Wolfgang Voelter

      Article first published online: 22 DEC 2003 | DOI: 10.1002/anie.197902251

      Thumbnail image of graphical abstract

      X-Ray structure analysis of thyrotropin-releasing hormone (TRH) has hitherto been precluded by the reluctance of TRH to crystallize. Suitable crystals of the closely related compounds Phe2-TRH have now been obtained. The structure of this compound is characterized by slight disorder (two conformations of the proline ring).

    12. Spherical Wrapping of a Linear Polyether around a Cation—1,20-Bis(8-quinolyloxy)-3,6,9,12,15,18-hexaoxaeicosane·RbI (pages 226–227)

      Dr. Gabriela Weber, Prof. Dr. Wolfram Saenger, Prof. Dr. Fritz Vögtle and Dipl.-Chem. Heinz Sieger

      Article first published online: 22 DEC 2003 | DOI: 10.1002/anie.197902261

      Thumbnail image of graphical abstract

      Complexs of very long polythers and alkali metal salts can be predicted to have two types of structures: 1) the polyether could wrap spherically around the cation and thus shield it from the anion, and 2) the polyether could adopt an S-shaped arrangement with each loop coordinating a cation, which is still bound to an anion for geometric reasons. These two types have been accomplished in (1) (cation: Rb+) and (2) (salt: 2KSCN).

    13. S-Shaped Binuclear Cation Complex of a Linear Polyether:1,5-Bis{2-[5-(2-nitrophenoxy)-3-oxapentyloxy]-phenoxy}-3-oxapentane·2KSCN (pages 227–228)

      Dr. Gabriela Weber and Prof. Dr. Wolfram Saenger

      Article first published online: 22 DEC 2003 | DOI: 10.1002/anie.197902271

      Thumbnail image of graphical abstract

      Complexs of very long polythers and alkali metal salts can be predicted to have two types of structures: 1) the polyether could wrap spherically around the cation and thus shield it from the anion, and 2) the polyether could adopt an S-shaped arrangement with each loop coordinating a cation, which is still bound to an anion for geometric reasons. These two types have been accomplished in (1) (cation: Rb+) and (2) (salt: 2KSCN).

    14. Stereochemistry of Nucleophilic Substitution at Cyclo-propanediazonium Ions (pages 228–229)

      Prof. Dr. Wolfgang Kirmse and Dr. Theodor Engbert

      Article first published online: 22 DEC 2003 | DOI: 10.1002/anie.197902281

      Thumbnail image of graphical abstract

      Model studies on SN2 substitution in cyclopropanes show that inversion occurs in the “normal case”—at least in compunds having N2 as leaving group. Thus, (1) reacts with configurational inversion to give (2) (4%) alongside the allyl compound (3). The reason for the retention observed in special cases, e.g. on deamination of (4), is probably a partly opened cation such as (5).

    15. Dianion and Tetraanion Octalene (pages 229–231)

      Prof. Dr. Klaus Müllen, Prof. Dr. Jean F. M. Oth, Dipl.-Chem. Hans-Wilhelm Engels and Prof. Dr. Emanuel Vogel

      Article first published online: 22 DEC 2003 | DOI: 10.1002/anie.197902291

      Thumbnail image of graphical abstract

      The reduction of octalene to anions is a challenging task since the structure of this (4n + 2)π-system permits several possible charges distributions in the anions. On treatment with lithium, octalene gives the dianion (1a) or (1b) and ultimately the tetraanion (2) which has a perimerer with π-bond delocalization resembling that of naphthalene.

    16. Stable Coordination Compounds of “Thiazyl Fluoride”: Structure of [Co(NSF)6]2+ in the Crystal (page 231)

      Dr. Bruno Buss, Dr. Peter G. Jones, Priv.-Doz. Dr. Rüdiger Mews, Dr. Mathias Noltemeyer and Prof. George M. Sheldrick

      Article first published online: 22 DEC 2003 | DOI: 10.1002/anie.197902311

      Thumbnail image of graphical abstract

      “Thiazyl fluoride” (NSF), the simplest nitrogen-sulfur-fluorine compound, is unstable at room temperature. It has now been stabilized as [Co(NSF)6][AsF6]2. The pronounced shortening of the SF and the SN bonds on complexation is worthy of note.

    17. Facile Synthesis of Cyclopropylalkadienes (pages 231–233)

      Priv.-Doz. Dr. Manfred Schneider and Angelika Rau

      Article first published online: 22 DEC 2003 | DOI: 10.1002/anie.197902312

      Thumbnail image of graphical abstract

      1,3-Dipolar cyclodditions of diazo compounds(1)to 1,3,5-trienes(2) open up a facile route to cyclopropanes such as (4) with dienyl side chains.—Compounds of this kind have been isolated from algae.

    18. Stabilization of an Arsanediylphosphorane (pages 233–234)

      Dipl.-Chem. Joachim von Seyerl and Prof. Dr. Gottfried Huttner

      Article first published online: 22 DEC 2003 | DOI: 10.1002/anie.197902331

      Thumbnail image of graphical abstract

      The arsinidene complex (1) can add Lewis bases; according to the nond lengths and the 31P-NMR spectrum the adduct (2), B[DOUBLE BOND]PPh3, must be formulated with a positive partial charge on P and a negative partial charge on As. (2), B[DOUBLE BOND]PPH3, is the first complex to contain an arsasnediylphosphorane ligand.

    19. Synthesis of a Zeise Salt Derivative with a Phosphorus Nitrogen Ylide as Chelate Ligand (pages 234–235)

      Prof. Dr. Otto J. Scherer and Dipl.-Chem. Andreas Nahrstedt

      Article first published online: 22 DEC 2003 | DOI: 10.1002/anie.197902341

      Thumbnail image of graphical abstract

      A new type of complex—formally derivable from Zeise's salt K[PtCl3(C2H4)]—has become accessible in the ethylene-platinum compound (1) (yellow crystals). The chelate ligand suystem takes over the role of the cation in (1).

    20. Cyclodiaza-λ6-thianes—Syntheses and Structures (pages 235–236)

      Dipl.-Chem. Frank-Michael Tesky, Priv.-Doz. Dr. Rüdiger Mews and Prof. Dr. Bernt Kerbs

      Article first published online: 22 DEC 2003 | DOI: 10.1002/anie.197902351

      Thumbnail image of graphical abstract

      The shape of the (S[BOND]N)2 ring is highly dependent upon the ligands: the ring is nonplanar in (1) but planar in (2). Compound (1) is obtained from (Me3CN[DOUBLE BOND])3S and C2F5[BOND]NCO, and (2) from (Me3SiN[DOUBLE BOND])3S and i-C3F7[BOND]NSO.

  3. Book Reviews

    1. Top of page
    2. Reviews
    3. Communications
    4. Book Reviews
    1. Book Review: Gas Chromatography with Glass Capillary Columns. By W. Jennings (page 237)

      Gerhard Spiteller

      Article first published online: 22 DEC 2003 | DOI: 10.1002/anie.197902371

SEARCH

SEARCH BY CITATION