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TABLE OF CONTENTS

Volume 22 Issue 7 , Pages 353 - 413 (July 2008)


Full Papers

Synthesis, spectral characterization, electrochemistry and catalytic activities of Cu(II) complexes of bifunctional tridentate Schiff bases containing ObondNbondO donors (p 353-358)
A. Manimaran, R. Prabhakaran, T. Deepa,. Natarajan, C. Jayabalakrishnan
Published Online: May 6 2008 8:48AM
DOI: 10.1002/aoc.1400

 

Paramagnetic copper(II) complexes of the type [Cu(PPh3)(L)] (where, L = bifunctional tridentate Schiff bases) have been synthesized and characterized by analytical, spectral (UV-Vis, FT-IR, EPR) and electrochemical data. The catalytic activity of the complexes has been found for the oxidation alcohols to their corresponding carbonyl compounds in the presence of N-methylmorpholin-N-oxide as co-oxidant.

 

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Microwave-assisted synthesis, characterization, biotoxicity and antispermatogenic activity of some antimony(III) complexes with NcapO and NcapS donor ligands (p 359-368)
Karuna Mahajan, Monika Swami, S. C. Joshi, R. V. Singh
Published Online: May 6 2008 8:48AM
DOI: 10.1002/aoc.1401

 

A new series of phenylantimony chloride and antimonychloride with Schiff base ligands L1H and L2H having NS and NO donor systems were synthesized in an open vessel under microwave irradiations using a domestic microwave oven. The present study was undertaken to evaluate the antispermatogenic effects of the ligands and complexes on male albino rats. The treatment with the ligands and their phenyantimony derivatives at dose levels of 20 mg per rat per day did not cause any significant change in the body weight, but a significant reduction in the weights of reproductive organs was observed. Arrest of spermatogenesis was noted at various stages with production of primary spermatocytes (preleptotene and pachytene), secondary spermatocytes and step-19 spermatids found to be decreased. Biochemical parameters of tissues, i.e. protein, sialic acid, cholesterol content of testes and seminal vesicular fructose, also showed significant reduction. Further, the serum testosterone concentrations were also decreased after treatment of ligands and their antimony(III) derivatives.

 

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Organotin(IV) carboxylates of cyclopropane carboxylic acid and 3-cyclohexylpropanoic acid: synthesis, characterization and biological activity. The crystal structure of bis(cyclopropanecarboxylato) tetramethyldistannoxane (p 369-377)
Moumita Sen Sarma, Aniruddha Saha, Abhijit Roy
Published Online: May 28 2008 5:16AM
DOI: 10.1002/aoc.1403

 

New biologically active tri-and diorganotincarboxylates of cyclopropane carboxylic acids and 3-cyclohexyl propanoic acid-crystal structure of a bis(dicarboxylato tetraorganodistannoxane) complex {[Me2Sn(cyclo-CH2)2CHCOO]2O}2 have been synthesized.

 

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Solvent-etching preparation and enhanced emission of acetylferrocene organometallic nanoparticles (p 378-382)
Pin-Shi Yuan, Qing-Sheng Wu
Published Online: May 28 2008 5:16AM
DOI: 10.1002/aoc.1409

 

A new type of acetylferrocene organometallic nanoparticles was prepared by a simple solvent-etching method. The fluorescence intensity was greatly increased in the nanoparticles compared with that of bulk materials in solid state.

 

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Synthesis and structure of novel spirosilanes. Combination of 1,2-hydroboration and 1,1-organoboration (p 383-388)
Bernd Wrackmeyer, Ezzathan, Rhettempe
Published Online: May 28 2008 5:16AM
DOI: 10.1002/aoc.1411

 

Spirosilanes are formed in the reaction of tetra(alkyn-1-yl)silanes Si(CC-R1)4 with 9-borabicyclo[3.3.1]nonane (9-BBN) in a 1:2 ratio via twofold 1,2-hydroboration, followed by twofold intramolecular 1,1-vinylboration.

 

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Synthesis and structural investigations on R2 Sn(IV)-D-aldonic acid complexes (R = methyl; butyl). Their effect on a new toxicity test organism, Liza saliens (Osteichthyes, Mugilidae): a histological study (p 389-396)
Nuccio Bertazzi, Girolamo Casella, Paolo D'Agati, Tiziana Fiore, Caterina Mansueto, Valentina Mansueto, Claudia Pellerito, Lorenzo Pellerito, Michelangelo Scopelliti
Published Online: May 28 2008 5:16AM
DOI: 10.1002/aoc.1412

 

In the R2Sn(IV)-D-aldonate complexes [(R = Me, Bu; D-aldonate = D-Galactonate2- (Galn), D-Gluconate2- (Glun), D-Gulonate2- (Guln), D-Ribonate2- (Ribn)], the ligands behave as dianionic bidentate agents. For the water-soluble Me2SnGalactonate and Me2SnGluconate, in water solution 1H, 13C and 119Sn NMR spectroscopy allowed elucidation of the structure of the occurring species, showing that the chelation is attained via carboxylate group and the alternate coordination between O2 and O4 alkoxydic oxygens. For Me2SnGluconate self-association was also observed.

 

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Palladium-catalyzed Heck coupling of 2-vinylpyridine with aryl chlorides (p 397-401)
Ming Li, Ruimao Hua
Published Online: May 28 2008 5:16AM
DOI: 10.1002/aoc.1414

 

An efficient PdCl2(PCy3)2-catalyzed cross-coupling reaction of 2-vinylpyridine with aryl chlorides to afford trans-2-styrylpyridines with a variety of functional groups on the benzene ring is described.

 

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New biosurfactants based on germylated fatty compounds (p 402-406)
N.atir, A. Eladib, A. Castel, P. Rivière, Z. Benmaarouf
Published Online: May 28 2008 5:16AM
DOI: 10.1002/aoc.1415

 

A simple and efficient method for producing amphiphilic germylated compounds has been developed by hydrogermylation of fatty acid methyl esters. The germylated precursors afford a micelle-type assembly in various solvents as evident by the formation of nanoparticles, micrometer spheres and lamellar forms.

 

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Copper perchlorate hexahydrate: a highly efficient catalyst for the cyanosilylation of aldehydes (p 407-411)
Anjoy Majhi, Sung Sooim, Ho Subim
Published Online: May 28 2008 5:16AM
DOI: 10.1002/aoc.1416

 

Cu(ClO4)6H2O has been found to be an efficient catalyst for cyanosilylation reaction of aldehydes in THF at room temperature with low catalytic loading (1.0 mol%) in short reaction time (mostly within 10 min).

 

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Book Reviews

Gadi Rothenberg. Catalysis - Concepts and Green Applications Wiley-VCH 2008. 279 pages; (hardback). ISBN-978-3 527-31824-7 (p 412)
Helmut Bönnemann
Published Online: May 28 2008 5:16AM
DOI: 10.1002/aoc.1408

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Bruno Pignataro (Editor). Tomorrow's Chemistry Today: Concepts in Nanoscience, Organic Materials and Environmental Chemistry. Wiley-VCH, 2008. 465 pages; (Hardcover). ISBN-10: 3-527-31918-2. ISBN-13: 978-3-527-31918-3 (p 413)
Neil Champness
Published Online: May 28 2008 5:16AM
DOI: 10.1002/aoc.1424

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