ChemPlusChem

Cover image for Vol. 77 Issue 5

May 2012

Volume 77, Issue 5

Pages 331–411

  1. Cover Picture

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      Cover Picture: Synthesis and Thermolysis of the Phosphorus-Rich Manganese(I) Complex [Mn2(μ-Br){cyclo-(P4tBu3)PtBu}(CO)6]: From Complexes to Metal Phosphides (ChemPlusChem 5/2012) (page 331)

      Dr. Aslihan Kircali, René Frank, Prof. Dr. Santiago Gómez-Ruiz, Prof. Dr. Barbara Kirchner and Prof. Dr. Evamarie Hey-Hawkins

      Article first published online: 10 MAY 2012 | DOI: 10.1002/cplu.201290020

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      The cover picture shows the thermolysis (up to 1000 °C) of the first phosphorus-rich manganese(I) complex [Mn2(μ-Br){cyclo-(P4tBu3)PtBu}(CO)6] with formation of antiferromagnetic (below 103 K) Mn2P as the final product via a phosphorus-rich phase (calculated as Mn2P5) at 315 °C. In their Full Paper on page 341 ff., E. Hey-Hawkins et al. describe the synthesis of the molecular precursor from Na[cyclo-(P5tBu4)] and [MnBr(CO)5]. The rearrangement of [cyclo-(P5tBu4)] into [cyclo-(P4tBu3)PtBu] was rationalized by theoretical studies. Cover designed by Volkan Senol.

  2. Masthead

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    1. Masthead: ChemPlusChem 5/2012 (page 332)

      Article first published online: 10 MAY 2012 | DOI: 10.1002/cplu.201290021

  3. Graphical Abstract

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    1. Graphical Abstract: ChemPlusChem 5/2012 (pages 333–337)

      Article first published online: 10 MAY 2012 | DOI: 10.1002/cplu.201290022

  4. News

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    1. Spotlights on our sister journals: ChemPlusChem 5/2012 (pages 338–340)

      Article first published online: 10 MAY 2012 | DOI: 10.1002/cplu.201290023

  5. Communications

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    1. Synthesis and Thermolysis of the Phosphorus-Rich Manganese(I) Complex [Mn2(μ-Br){cyclo-(P4tBu3)PtBu}(CO)6]: From Complexes to Metal Phosphides (pages 341–344)

      Dr. Aslihan Kircali, René Frank, Prof. Dr. Santiago Gómez-Ruiz, Prof. Dr. Barbara Kirchner and Prof. Dr. Evamarie Hey-Hawkins

      Article first published online: 28 FEB 2012 | DOI: 10.1002/cplu.201200013

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      A complex matter: Na[cyclo-(P5tBu4)] reacts with two equivalents of [MnBr(CO)5] to give the phosphorus-rich manganese(I) complex [Mn2(μ-Br){cyclo-(P4tBu3)PtBu}(CO)6] (see structure) containing a [{cyclo-(P4tBu3)}PtBu] ligand. The rearrangement of [cyclo-(P5tBu4)] to [cyclo-(P4tBu3)PtBu] was rationalized by theoretical studies. Thermolysis of up to 1000 °C gives Mn2P.

    2. [18F]Si-RiboRGD: From Design and Synthesis to the Imaging of αvβ3 Integrins in Melanoma Tumors (pages 345–349)

      Dr. Eric Amigues, Dr. Jürgen Schulz, Dr. Magali Szlosek-Pinaud, Prof. Philippe Fernandez, Dr. Sandrine Silvente-Poirot, Dr. Séverine Brillouet, Prof. Frédéric Courbon and Prof. Eric Fouquet

      Article first published online: 1 MAR 2012 | DOI: 10.1002/cplu.201200022

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      The winning combination: A new and promising 18F-labeled RGD derivative has been efficiently prepared by exploiting the advantages of “click” chemistry and a one-step labeling protocol where a silicon-based building blocks was used (see figure). This derivative could be a new starting point for improved visualization of αvβ3-positive tumors by positron emission tomography.

    3. Organometallic Strontium Borohydrides: Synthesis, X-ray Structures, Catalytic Polymerization of ε-Caprolactone, and Density Functional Calculations (pages 350–353)

      Dr. Sebastian Marks, M. Sc. Magdalena Kuzdrowska, Prof. Dr. Peter W. Roesky, Dr. Liana Annunziata, Dr. Sophie M. Guillaume and Prof. Dr. Laurent Maron

      Article first published online: 22 MAR 2012 | DOI: 10.1002/cplu.201200052

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      The first organometallic strontium–borohydride complexes [(η5-C5Me5)Sr(BH4)(thf)2]2 (see structure), [{(Me3SiNPPh2)2CH}Sr(BH4)(thf)2], and [Sr(BH4)2(thf)2] have been isolated. Polyesters with the highest molar mass prepared from a molecular alkaline earth metal were obtained from these complexes in the controlled ring-opening polymerization of ε-caprolactone (PCL). α,ω-Dihydroxytelechelic PCLs were obtained, in agreement with density functional calculations.

  6. Full Papers

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    1. Shedding Light on Intermolecular Metal–Organic Ring Interactions by Theoretical Studies (pages 354–360)

      Dr. Konstantis F. Konidaris, Dr. Athanassios C. Tsipis and Dr. George E. Kostakis

      Article first published online: 14 MAR 2012 | DOI: 10.1002/cplu.201200018

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      Nice as pie: The nature of a metal–organic ring interactions between CuII and malonamide-N,N′-diacetic acid have been investigated using density functional calculations. All compounds form almost planar five- and six-membered chelated rings which are stacked similarly to ππ aromatic systems, in the absence of any aromatic ring (see figure).

    2. The Binding of a Hydroxy-9,10-anthraquinone CuII Complex to Calf Thymus DNA: Electrochemistry and UV/Vis Spectroscopy (pages 361–369)

      Dr. Partha S. Guin, Prof. Parikshit C. Mandal and Dr. Saurabh Das

      Article first published online: 14 MAR 2012 | DOI: 10.1002/cplu.201100046

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      [Cu(AS)2(H2O)2], a 1:2 sodium 1,4-dihydroxy-9,10-anthraquinone-2-sulphonate CuII complex (see structure), interacts with calf thymus DNA at physiological pH. The binding constant and size of the binding site have been evaluated by UV/Vis spectroscopy and cyclic voltammetry. Nonlinear curve fitting was used for the first time to analyze the interaction of the complex with DNA through cyclic voltammetry. AS is a simple analogue of anthracycline anticancer drugs.

    3. Novel Fe3+-Based 1H MRI β-Galactosidase Reporter Molecules (pages 370–378)

      Prof. Jian-Xin Yu, Dr. Praveen K. Gulaka, Dr. Li Liu, Prof. Vikram D. Kodibagkar and Prof. Ralph P. Mason

      Article first published online: 13 MAR 2012 | DOI: 10.1002/cplu.201100072

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      Molecular imaging promises non-invasive detection of enzyme activity in vivo: Previously, β-galactosidase activity representing lacZ expression in tumors was demonstrated based on signal loss in T2*-weighted 1H MRI following cleavage of 3,4-cyclohexenoesculetin-β-D-galactopyranoside (S-Gal) as a reporter. A series of newly synthesized analogues promises enhanced utility by generating both T1 and T2 contrast, as demonstrated to selectively detect β-gal activity in transfected human cancer cells.

    4. Stable and Water-Dispersible Graphene Nanosheets: Sustainable Preparation, Functionalization, and High-Performance Adsorbents for Pb2+ (pages 379–386)

      Hongjie Song, Liying Hao, Yunfei Tian, Xiangyu Wan, Lichun Zhang and Prof. Yi Lv

      Article first published online: 22 MAR 2012 | DOI: 10.1002/cplu.201200012

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      On a friendly footing: The preparation and functionalization of graphene nanosheets from graphene oxide using tea polyphenols as simultaneous reductant and functionalization reagent has been achieved in one step (see scheme; Go=graphene oxide, TPG=tea polyphenols–graphene). This environmentally friendly, simple, and low-cost method can be extended to large-scale preparation. The nanosheets, having a mostly single-layer structure, show high adsorbance for Pb2+.

    5. Permethylated Salts and Radicals Derived from Azo peri-Naphthalenes (pages 387–395)

      Dr. D. Scott Bohle, Zhijie Chua, Timothy Johnstone, Dr. Andrey G. Moiseev, Dr. Inna Perepichka and Kristopher A. Rosadiuk

      Article first published online: 13 MAR 2012 | DOI: 10.1002/cplu.201200021

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      Easy-bake nitrenium: By a simple two-step process one can produce, in high yield, salts of azo peri-naphthalene cations, which are intensely colored, stable, soluble carbene analogues (see figure). In the interest of making this a valuable addition to every chemist's toolbox, a comprehensive synthesis, discussion, and characterization of several derivatives of this distinctive class of chromophores is presented.

    6. Synthesis, Chiral Resolution, and Absolute Configuration of Functionalized Tröger’s Base Derivatives: Part II (pages 396–403)

      Dipl.-Chem. Christian Benkhäuser-Schunk, Dipl.-Chem. Boris Wezisla, Dipl.-Chem. Kirstin Urbahn, Dr. Ulf Kiehne, Dr. Jörg Daniels, Dr. Gregor Schnakenburg, Prof. Dr. Frank Neese and Prof. Dr. Arne Lützen

      Article first published online: 15 MAR 2012 | DOI: 10.1002/cplu.201200029

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      Tröger's base derivatives have been prepared and resolved by HPLC or recycling HPLC techniques on a chiral stationary phase on a semipreparative scale. The absolute configurations of the resolved enantiomers were assigned by quantum chemical circular dichroism calculations and/or by X-ray crystallography (see figure).

    7. Synthesis and Structure of Binuclear O/S-Bridged Organobismuth Complexes and Their Cooperative Catalytic Effect on CO2 Fixation (pages 404–410)

      Dr. Renhua Qiu, Zhengong Meng, Prof. Dr. Shuangfeng Yin, Xingxing Song, Dr. Nianyuan Tan, Dr. Yongbo Zhou, Kun Yu, Xinhua Xu, Prof. Dr. Shenglian Luo, Prof. Dr. Chak-Tong Au and Prof. Dr. Wai-Yeung Wong

      Article first published online: 14 MAR 2012 | DOI: 10.1002/cplu.201200030

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      Bridge the gap: Three air-stable binuclear sulfur-bridged organobismuth complexes have been synthesized and were found to show high cooperative catalytic effect on CO2 transformation into cyclic carbonates with epoxides (see scheme). By using a sulfur atom for bridging and varying the nitrogen substituent, one can regulate the ligand system of the bismuth centers to mimic those of the natural metalloenzymes.

  7. Preview

    1. Top of page
    2. Cover Picture
    3. Masthead
    4. Graphical Abstract
    5. News
    6. Communications
    7. Full Papers
    8. Preview
    1. You have free access to this content
      Preview: ChemPlusChem 6/2012 (page 411)

      Article first published online: 10 MAY 2012 | DOI: 10.1002/cplu.201290024

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