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TABLE OF CONTENTS

Volume 21 Issue 9 , Pages 719 - 820 (September 2007)


Contents

Contents (p i-v)

Published Online: Jul 26 2007 4:22AM
DOI: 10.1002/aoc.1315

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Bioorganometallic Chemistry

Dicoumarol complexes of Cu(II), Fe(II) and Fe(III): preparation, characterization, in-vitro antibacterial and DNA binding activity (p 719-727)
Pramod B. Pansuriya, Mohan N. Patel
Published Online: Jun 7 2007 4:24AM
DOI: 10.1002/aoc.1246

 

The synthesized dicoumarol complexes have been well characterized using spectroscopic techniques. They exhibit good antibacterial activity. The molecular analyses result of plasmid pBR322 DNA gel electrophoresis suggests effective DNA binding with metal complexes.

 

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Metal-based sulfonamides: synthesis, characterization, antibacterial, antifungal and cytotoxic properties of pyrrolyl- and thienyl-derived compounds (p 728-738)
Zahid H. Chohan, Muhammad M. Naseer
Published Online: Jun 21 2007 6:53AM
DOI: 10.1002/aoc.1279

 

Pyrrolyl and thienyl derived sulphonamides and their metal complexes have been synthesized and characterized by elemental analyses, molar conductances, magnetic moments, IR, NMR and electronic spectral data. These compounds have been screened for in-vitro antibacterial activity against four Gram-negative (E. coli, S. flexeneri, P. aeruginosa and S. typhi) and two Gram-positive (B. subtilis and S. aureus) bacterial strains and, for in-vitro antifungal activity against T. longifusus, C. albicans, A. flavus, M. canis, F. solani and C. glaberata. The brine shrimp bioassay was also carried out to study their in-vitro cytotoxic properties against Artemia salina.

 

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Synthesis, spectral, thermal, DNA interaction and antimicrobial properties of novel Cu(II) heterochelates (p 739-749)
Pramod B. Pansuriya, Mohan N. Patel
Published Online: Jun 21 2007 6:47AM
DOI: 10.1002/aoc.1287

 

Cu(II) heterochelates have been syn- thesized and characterized using spectroscopic technique. All the chelates exhibit higher antimicrobial activity than parental compounds. The absorption titration for sperm herring DNA and gel electrophoresis for pBR322 DNA show interpretative interaction of DNA with Cu(II) heterochelates.

 

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Speciation Analysis and Environment

Arsenic sorption and redox transformation on iron-impregnated ordered mesoporous carbon (p 750-757)
Zhimang Gu, Baolin Deng
Published Online: Jun 25 2007 11:35AM
DOI: 10.1002/aoc.1283

 

Batch experiments showed that arsenic sorption onto FeOMC depended on pH and some anions (i.e., PO43- and SiO32-). Arsenate was observed in the systems spiked with only arsenite under alkaline conditions, attributed to both direct and catalytic oxidation of arsenite on the solid surfaces. Arsenic sorption under various pH conditions could be well explained by the surface complexation model.

 

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Materials, Nanoscience and Catalysis

Synthesis, structure and characterization of some Schiff bases bearing phenylferrocene (p 758-762)
Faiz Ullah Shah, Zareen Akhter, Humaira M. Siddiqi, Masood Parvez
Published Online: Jun 7 2007 4:15AM
DOI: 10.1002/aoc.1255

 

Some novel Schiff bases bearing phenyl fer-a1255ga.eps rocene were synthesized and subsequently characterized by spectroscopic methods and elemental analyses. The structure of compound F1 was also determined by single crystal analysis.

 

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Synthesis, characterization and soft transformation of some bis(cyclopentadienyl) Ti(IV) and Zr(IV) complexes of Schiff's base ligands to nano-sized titania or zirconia materials (p 763-771)
Namita Sharma, Vinita Sharma, Rakesh Bohra, V. S. Raju
Published Online: Jun 7 2007 4:18AM
DOI: 10.1002/aoc.1262

 

Derivatives of the types Cp2MCl2-n{O(C6H4)a1262ga.eps CH6H5}n and Cp2MCl2-n{OC(CH3)(R)6H5}n (where R = CH3 or C6H5 and n = 1 or 2) have been prepared and characterized by spectroscopic and FAB mass and TGA studies. These derivatives undergo soft transformation to pure titania and zirconia at low sintering temperatures as indicated by XRD and SEM studies.

 

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Highly efficient N-Heterocyclic carbene-palladium complex-catalyzed multicomponent carbonylative Suzuki reaction: novel practical synthesis of unsymmetric aryletones (p 772-776)
ShuZhan Zheng, LiWen Xu, ChunGu Xia
Published Online: Jun 21 2007 10:13AM
DOI: 10.1002/aoc.1289

 

Highly efficient and chemoselective N- heterocyclic carbene palladium complexes-catalyzed multicomponent carbonyltive Suzuki reaction with sodium tetraphenylborate used as phenylating reagent has been demonstrated in this paper. Both electron-rich and electron-deficient aryl iodides gave unsymmetric aryletones in excellent yields.

 

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Remarkable solvent effects in the hydro- and solvothermal synthesis of copper-1,10-phenanthroline complexes (p 777-781)
Xiong-Bin Chen, Bin Chen, Yi-Zhi Li, Xiao-Zeng You
Published Online: Jun 25 2007 11:32AM
DOI: 10.1002/aoc.1267

 

A new complex [(Cu(II)/Cu(I))2(ophen)4 (Htpt)]·2H2O has been synthesized and characterized. The X-ray structural analysis of [(Cu(II)/Cu(I))2(ophen)4(Htpt)]·2H2O reveals two crystallographically independent dimeric [Cu2(ophen)2]+ units bridged by two µ1- carboxylate groups of the tpt ligand into a butterfly-shaped molecule in the crystal structure.

 

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Fluoride effect on the palladium-phenanthroline catalyzed carbonylation of nitroarenes to carbamates (p 782-787)
Michela Gasperini, Fabio Ragaini, Sergio Cenini, Emma Gallo, Simone Fantauzzi
Published Online: Jun 26 2007 4:07AM
DOI: 10.1002/aoc.1292

 

Fluorides promote the palladium-phenanthroline catalyzed carbonylation of nitroarenes to carbamates. The effect is more evident on the rate of the reaction at short reaction times, but a positive effect on selectivity is also observed under certain conditions. The effect is observed even under conditions under which chloride inhibits the reaction. Tetraethylammonium is a better countercation than sodium.

 

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Synthetic and catalytic investigations of ruthenium(III) complexes with triphenylphosphine/triphenylarsine and tridentate Schiff base (p 788-793)
S. Priyarega, R. Prabhakaran,. R. Aranganayagam, R.arvembu,. Natarajan
Published Online: Jun 28 2007 10:05AM
DOI: 10.1002/aoc.1281

 

The hexacoordinate ruthenium(III) complexes of the type [RuB(EPh3)2(L)] (B = Cl or Br; E = P or As; L = tridentate Schiff base dianion) were synthesized and characterized by analytical and spectral techniques. The new complexes were found to catalyze the oxidation of benzyl alcohol and cyclohexanol to corresponding carbonyl compounds in presence of N-methylmorpholine-N-oxide.

 

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Reactions of [Cp*Ru(H2O)(NBD)]+ with alkynes (p 794-797)
Wei-Cheng Xiong, Guang-Ao Yu, Quan Gan, Jun Yin, Xiang-Gao Meng, Sheng Hua Liu
Published Online: Jul 3 2007 5:20AM
DOI: 10.1002/aoc.1288

 

Formal [2 + 2 + 2] addition reactions of [Cp*Ru(H2O) (NBD)]BF4 (NBD = norbornadiene) with PhCCR (R = H, COOEt) give [Cp*Ru(6-C6H5C9H8R)] BF4 (1a, R = H; 2a, R = COOEt), respectively. While treatment of [Cp*Ru(H2O)(NBD)]BF4 with PhCCCCPh give [Cp*Ru(6-C6H5CCCCPh)] BF4(3a). Their structures were determined by X-ray crystallography.

 

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Main Group Metal Compounds

Cyanosilylation of carbonyl compounds catalyzed by sodium L-histidine (p 798-803)
Soney C. George, Sung Sooim, Gurusamy Rajagopal
Published Online: Jun 7 2007 6:45AM
DOI: 10.1002/aoc.1278

 

Sodium L-histidine acts as a highly effective catalyst for the cyanosilylation of various carbonyl compounds to the corresponding cyanohydrin trimethylsilyethers up to 99% yield. The reaction proceeds smoothly with 1 mol% of the catalyst loading at room temperature.

 

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A supramolecular hydrogen-bonded complex between 1,3,5-tris(diisobutylhydroxysilyl)benzene and trans-bis(4-pyridyl)ethylene (p 804-808)
Jens Beckmann, Sanna L. Jänicke
Published Online: Jun 7 2007 4:13AM
DOI: 10.1002/aoc.1261

 

1,3,5-tris(diisobutylhydroxysilyl)benzene and trans-bis(4-pyridyl)ethylene form a supramolecular 1:1 complex featuring both SiOH·O(H)Si and SiOH·N hydrogen bonds. The supramolecular motif differs substantially from previously reported complexes between 1,3,5-tris(diisopropylhydroxysilyl)benzene and related spacer bridged 4,4-bis(pyridines).

 

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Enantioselective cyanosilylation of aldehydes catalyzed by Mn(salen) complex/triphenyl phosphine oxide (p 809-813)
Sung Sooim, Ju Myungwak, Soney C. George
Published Online: Jun 21 2007 6:50AM
DOI: 10.1002/aoc.1284

 

Various aldehydes were subjected to enantioselective addition of TMSCN catalyzed by 1/Ph3PO. The reaction proceeds smoothly with 0.25 mol% of catalyst loading at 0 °C, giving up to 95% yield and 67% ee.

 

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Some addition reactions of bisgermavinylidene (p 814-818)
Wing-Por Leung,wok-Waian, Cheuk-Wai So, Thomas C. W. Mak
Published Online: Jun 21 2007 6:42AM
DOI: 10.1002/aoc.1293

 

The reaction of bisgermavinylidene [(Me3SiNPPh2)2CGeGeC(PPh2NSiMe3)2] (1) with AdNCO (Ad = Adamantyl) and Ph3SiOH afforded the [2 + 2] cycloaddition product [(Me3SiNPPh2)2CGeC(O)NAd] (2) and the base-stabilized germanium(II) triphenylsiloxide [H2C(PPh2NSiMe3)2Ge(OSiPh3)2] (3), respectively. The X-ray structures of 2 and 3 have been determined.

 

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Book Reviews

Claas Junghans and Adam Levy. Intellectual property management: a guide for scientists, engineers, financiers and managers. Wiley-VCH, 2005, 170pp; ISBN 3-527-31286-2 (hardcover) (p 819)
Ruth Soetendorp
Published Online: Jul 26 2007 4:22AM
DOI: 10.1002/aoc.1285

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Antonio Mendez-Vilas (ed.). Modern multidisciplinary applied microbiology: exploiting microbes and their interactions. Wiley-VCH, August 2006, 82pp; ISBN 978-3-527-31611-3 (hardcover) (p 820)
Richard O. Jenkins
Published Online: Jul 26 2007 4:22AM
DOI: 10.1002/aoc.1291

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