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TABLE OF CONTENTS

Volume 21 Issue 3 , Pages 129 - 209 (March 2007)


Contents

Contents (p i-iii)

Published Online: Jan 30 2007 11:35AM
DOI: 10.1002/aoc.1218

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Bioorganometallic Chemistry

Synthesis, magnetic property and DNA cleavage behavior of a new dialkoxo-bridged diiron(III) complex (p 129-134)
Jing-Yuan Xu, Jin-Lei Tian, He-Dong Bian, Shi-Ping Yan, Dai-Zheng Liao, Peng Cheng, Pan-Wen Shen
Published Online: Jan 30 2007 11:35AM
DOI: 10.1002/aoc.1199

 

A new dialkoxo-bridged diiron(III) com-plex is presented. Cryomagnetic analyses indicated a moderate antiferromagnetic interaction between Fe(III) ions. The binding interaction of DNA with the diiron complex was investigated by spectroscopic and agarose gel electrophoretic methods, showing moderate cleavage activity on pBR322 plasmid DNA.

 

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Materials, Nanoscience and Catalysis

Catalysis by Ir(III), Rh(III) and Pd(II) metal ions in the oxidation of organic compounds with H2O2 (p 135-138)
Praveen. Tandon, Gayatri, Sumita Sahgal, Manish Srivastava, Santosh B. Singh
Published Online: Jan 30 2007 11:35AM
DOI: 10.1002/aoc.1169

 

Activation of H2O2 by traces of transition metal ions results in good to excellent yields of organic compounds. This one pot system is eco-friendly convenient, and oxidizes a wide range of organic compounds. Regeneration of solvent make it highly economical.

 

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Multinuclear enantiopure titanium self-assembly complexes - synthesis, characterization and application to organic synthesis (p 139-145)
Bernd Schetter, Christoph Stosiek, Burkhard Ziemer, Rainer Mahrwald
Published Online: Jan 30 2007 11:35AM
DOI: 10.1002/aoc.1183

 

The synthesis of two multinuclear chiral titanium complexes has been described as well as the application of these complexes in direct aldol addition and carbonyl-ene reaction. High regio- and diastereoselectivities were observed.

 

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Short Communications

Solvothermal synthesis of TiO2: anatase nanocrystals and rutile nanofibres from TiCl4 in acetone (p 146-149)
Yu Wu, Hong-Mei Liu, Bo-Qing Xu
Published Online: Jan 30 2007 11:35AM
DOI: 10.1002/aoc.1184

 

We demonstrate low temperature (110 °C) solvothermal syntheses of single-phase titania from TiCl4 in acetone. Small, uniform and yet size-tunable (5-10 nm) anatase titania nanocrystallites are synthesized using a low concentration of TiCl4 in acetone; rutile nanofibers are obtained using a high concentration of TiCl4.

 

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Materials, Nanoscience and Catalysis

Two novel benzenedicarboxylate-metal complexes: synthesis, crystal structures and fluorescent properties (p 150-155)
Yi-Shan Song, Bing Yan, Zhen-Xia Chen
Published Online: Jan 30 2007 11:35AM
DOI: 10.1002/aoc.1187

 

Two novel benzenedicarboxylate- metal complexes [Sm(nphth) (Hnphth)(H2O)3·H2O]2 and [Zn (nphth)(bipy)(H2O) H2O]2 (2) (H2nphth = 3-nitrophthalic acid, bipy = 2,2-bipyridine) have been synthesized under hydrothermal condition. Both of which and characterized exhibit dimeric structure with different coordination mode of nphth ligand and show differentinds of luminescence.

 

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Heterogeneous dehalogenation of arylhalides in the presence of ionic liquids (p 156-160)
C. André Ohlin, Zolt´n Béni, G´bor Laurenczy, Nuria Ruiz, Anna M. Masdeu-Bultó
Published Online: Jan 30 2007 11:35AM
DOI: 10.1002/aoc.1194

 

Dehydrohalogenation of haloaromatics in ionic liquids- derived from ethylmethylimidazolium or similar salts has been performed using PdC, Pd(OAc)2 and other catalysts using formate salts as a hydrogen source. In the ionic liquid [emim][BF4], chlorobenzene was dehalogenated by up to 40%, bromobenzene up to 25% and iodobenzene up to 41% in 2 h. Reactions in the absence of the ionic liquid were also performed.

 

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Structural studies on ruthenium(II) complexes used in interphase catalysis for the hydrogenation ofetones (p 161-171)
Venkatarishnan, Helmut Bertagnolli
Published Online: Jan 30 2007 11:35AM
DOI: 10.1002/aoc.1195

 

Structural studies performed on catalytically active ruthenium(II) complexes indicate that the complexes retain their structural integrity when they are embedded on polysiloxane matrices to form stationary phase materials. The AXAFS studies reveal that the variations in the catalytic activity of the complexes with different ligands can be correlated to the differences in the electronic structure around the active ruthenium center.

 

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Preparation, characterization and catalytic oxidation properties of bis-quaternary ammonium peroxotungstates and peroxomolybdates complexes (p 172-176)
Xianying Shi, Junfa Wei
Published Online: Jan 30 2007 11:35AM
DOI: 10.1002/aoc.1196

 

Several novelinds of bis-quaternary ammonium peroxotungstate and peroxomolybdate complexes have been synthesized and complexes characterized by elemental analysis, IR and Raman spectroscopy. Their catalytic properties in mild oxidation of benzyl alcohol and ring-substituted benzyl alcohols were investigated with aqueous 30% H2O2 under halide- and organic solvent-free conditions.

 

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Synthesis, structure, and activity of (PhCH2NH2)2CuCl2 for oxidative coupling of 2-naphthylamine (p 177-182)
Guofu Zi, Li Xiang, Yadong Zhang, Qiuwen Wang, Zhanbin Zhang
Published Online: Jan 30 2007 11:35AM
DOI: 10.1002/aoc.1197

 

Oxidative coupling of 2-naphthyl-amine (1) using a simple effective oxidation reagent (PhCH2NH2)2-CuCl2 (2) gives the intermediate [{1,1-(C10H6)2-2,2-(NH2)2}2- CuCl] Cl·CH3OH·3H2O (3), which is decomposed to give 2,2-diamino-1,1-binaphthyl (4) in a moderate yield.

 

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Main Group Metal Compounds

A highly efficient synthesis of (Z)-1-aryl-2-silyl-1- stannylethenes and their conversion to (E)-2- arylethenyl-, (Z)-2-(2-pyridyl)ethenyl- and allenyl-silanes (p 183-197)
Takanori Endo, Fumio Sasaki, Hisashi Hara, Jyunko Suzuki, Shizuka Tamura, Yoshikazu Nagata, Tetsuro Iyoshi, Atsuhiro Saigusa, Taichi Nakano
Published Online: Jan 30 2007 11:35AM
DOI: 10.1002/aoc.1186

 

A Pd(dba)2-P(OR)3 combina-tion allowed the silastannation of acetylenes to take place at room temperature, producing (Z)-2-silyl-1-stannyl-1-phenylethene in high yield. Protodemetallation of the novel (Z)-silyl(stannyl) ethenes produced (E)-vinylsilanes, (Z)-vinylsilane or allenylsilane, depending on the silyl(stannyl) ethene.

 

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Short Communications

Aluminum phthalocyanine: an active and simple catalyst for cyanosilylation of aldehydes (p 198-202)
Gurusamy Rajagopal, Sung Sooim, Soney C. George
Published Online: Jan 30 2007 11:35AM
DOI: 10.1002/aoc.1189

 

Aluminum phthalocyanine (AlPc) in the presence of Ph3PO acts as a highly effective catalyst for cyanosilylation of various aldehydes to the corresponding cyanohydrin trimethylsilyl ethers. The reaction proceeds smoothly with 5 mol% catalyst loading at room temperature, giving up to 96% yield.

 

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Main Group Metal Compounds

Semiempirical studies on the interactions of dialkyldi(aquo)tin cations, [R2Sn(H2O)2]2+, with selected nucleotides (p 203-208)
Eduardo P. Cassús, Sergio P. Machado, James L. Wardell
Published Online: Jan 30 2007 11:35AM
DOI: 10.1002/aoc.1192

 

Interactions of [R2Sn(H2O)2]2+ with 5-AMP, 5-GMP, 5- CMP, 5-UMP and 5-IMP have been studied by semi-empirical methods. The preferred sites of interaction were calculated to be the ribose O2 and O3 hydroxyl oxygens and/or the phosphate oxygens, with the nitrogen sites in the bases the least attractive to the tin compounds.

 

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Errata

Erratum: Ying-Tao Yu and Bo-Qing Xu, Shape-controlled synthesis of Pt evolution of the tetrahedral shape. Appl. Organomet. Chem. 2006; 20: 638-647. (p 209)

Published Online: Jan 30 2007 11:35AM
DOI: 10.1002/aoc.1164

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