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TABLE OF CONTENTS

Volume 20 Issue 3 , Pages 161 - 233 (March 2006)


Speciation Analysis and Environment

Methylation of tin(II) by methyl iodide: influences of different environmental factors on the efficiency and reactioninetics (p 161-167)
Chen Baowei, Jiang Guibin, Yang Ruiqiang, Liu Jiyan
Published Online: Jan 31 2006 8:12AM
DOI: 10.1002/aoc.1032

 

Different species of inorganic tin at different pH water have different reaction activity. As a relatively weak nucleophilic ion, high concentration Cl- would obstruct methylation reaction of tin

 

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Bioorganometallic Chemistry

Synthesis of cyclopentadienyltricarbonylrhenium substituted benzhydryl species and oestrogen receptor binding properties (p 168-174)
D. Plazdotuk, F. Le Bideau, A. Pérez-Luna, E. Stéphan, A. Vessières, J. Zakrzewski, G. Jaouen
Published Online: Feb 1 2006 12:12PM
DOI: 10.1002/aoc.1034

 

New CpRe(CO)3-substituted benzhydryl compounds were prepared from the condensation of varied aryllithium species with 6-(4-methoxyphenyl) fulvene followed by a transmetallation process involving an appropriate metallic source. The relative binding affinity values of these complexes were measured for both the and forms of the oestrogen receptor (ER or ER).

 

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Materials, Nanoscience and Catalysis

Vinyl polymerization of norbornene with novel nickel (II) diphosphinoamine/methylaluminoxane catalytic system (p 175-180)
Zhengguang Sun, Fangming Zhu, Qing Wu, Shang-an Lin
Published Online: Dec 16 2005 4:12AM
DOI: 10.1002/aoc.1024

 

The novel Ni (II) complex/MAO system dis- played high catalytic activity for vinyl polymerization of norbornene. The catalytic activity could be up to 7.63 × 105 g PNBE (mol Ni h)-1, and could obtain the polynorbornene with high molecular weight and broad molecular weight distribution.

 

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Nickel (II) complexes supported by a fluorinated beta-diketiminate backbone ligand: synthesis, catalytic activity toward norbornene polymerization, and the oxygenated species (p 181-186)
Yongfei Li, Long Jiang, Lingyun Wang, Haiyang Gao, Fangming Zhu, Qing Wu
Published Online: Jan 30 2006 4:14AM
DOI: 10.1002/aoc.1042

 

Nickel (II) complexes of fluorinated -diketiminate backbone ligands were synthesized and studied for norbornene polymerization when activated by MAO. The obtained polynorbornenes are vinyl type by NMR and IR analysis. Treatment of the nickel complex with oxygen gives rise to intramolecular aerobic hydroxylation.

 

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Synthesis of novel palladium N-heterocyclic-carbene complexes as catalysts for Heck and Suzuki cross-coupling reactions (p 187-192)
Ismail Özdemir, Murat Yigcaronit, Engin Çetinkaya, Bekir Çetinkaya
Published Online: Jan 31 2006 8:12AM
DOI: 10.1002/aoc.1038

 

Five novel palladium-carbenes have been prepared and characterized. These palladium-carbene complexes are excellent catalysts for the Heck and Suzuki cross-coupling reaction.

 

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Synthesis, crystal structure and electrochemical properties of three isocloso eleven-vertex ferrocenecarboxylate ruthenaborane clusters (p 193-202)
Jianmin Dou, Qingliang Guo, Libin Wu, Dacheng Li, Daqi Wang, Huaisheng Wang, Yantuan Li
Published Online: Jan 31 2006 8:12AM
DOI: 10.1002/aoc.1031

 

Three 11-vertex ferrocenecarboxylate ruthenaborane clusters: [PPh3(H2O)(FcCO2)RuB10H8Cl] (1), [(PPh3)2ClRu(PPh3)(FcCO2)RuB10H9]·0.5CH2Cl2 (2 × 0.5CH2Cl2) and [PPh3(FcCO2)2RuB10H8] (3) were synthesized by reaction of [RuCl2(PPh3)3] with closo-[B10H10]2- and C5H5FeC5H4COOH (FcCO2H) in refluxing CH2Cl2 solution.

 

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Preparation, spectral characterization, electrochemistry, EXAFS, antibacterial and catalytic activity of new ruthenium (III) complexes containing ONS donor ligands with triphenylphosphine/arsine (p 203-213)
R. Prabhakaran, V.rishnan,. Pasumpon, D. Sukanya, E. Wendel, C. Jayabalakrishnan, H. Bertagnolli,. Natarajan
Published Online: Dec 12 2005 4:50AM
DOI: 10.1002/aoc.1026

 

Mononuclear ruthenium (III) complexes of the type [RuX(EPh3)2(L)] (X = Cl or Br; L = dibasic tridentate Schiff base ligand; E = P or As) were synthesized and characterized by elemental analysis, IR, EPR, EXAFS and cyclic voltammetry. The results confirm an octahedral structure for the new complexes. The complexes showed high catalytic activity in the oxidation of alcohols and also exhibited considerable antibacterial activity towards microbials.

 

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Main Group Metal Compounds

A mild and efficient palladium-triethylsilane system for reduction of olefins and carbon-carbon double bond isomerization (p 214-219)
Maryam Mirza-Aghayan, Rabah Boukherroub, Mohammad Bolourtchian
Published Online: Jan 30 2006 4:14AM
DOI: 10.1002/aoc.1036

 

The versatility of palladium(II) acetate and palladium on activated charcoal catalysts with triethylsilane has been investigated in the hydrogenation and the isomerization of carbon-carbon double bond of 1-alkenes.

 

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Triphenyltin hydroxide as a precursor for the synthesis of nanosized tin-doped TiO2 photocatalysts (p 220-225)
Fernando Fresno, David Tudela, A. Javier Maira, Francisco Rivera, Juan M. Coronado, Javier Soria
Published Online: Dec 19 2005 5:11AM
DOI: 10.1002/aoc.1030

 

The reaction of TiCl4 with Ph3SnOH in CH2Cl2 proceeds to the formation of tin-doped TiO2 photocatalysts by means of dehydration of Ph3SnOH and hydrolysis of TiCl4. The materials obtained have a high activity for the photooxidation of toluene in the gas phase, one of them being particularly promising.

 

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Structural study of C,N-chelated monoorganotin(IV) halides (p 226-232)
Petr Novák, Zdencaronka Padecaronlková, Ivana Císarcaronová, Lenkaolárcaronová, Alescaron Ruringzcaroniccaronka, Jaroslav Holeccaronek
Published Online: Jan 31 2006 8:12AM
DOI: 10.1002/aoc.1033

 

Three monoorganotin(IV) compounds of general formula LCNSnX3, where LCN is 2-(dimethylaminomethyl)phenyl- group and X = Cl (1), Br (2) and I (3), were prepared and characterized using XRD and NMR techniques. Compound 1 reacts with moisture producing [(LCN)2HSnCl2]+ [LCNSnCl4]-. Compound 3 decomposes to (LCN)2SnI2, SnI2 and I2 when heated. Compound 2 was reacted with NH4F yielding an equilibrium of fluorine-containing species. The major products were [LCNSnF5]2- and [(LCNSnF3)2(µ2-F)2]2- (4a). When 2 was reacted with another fluorinating agent, LCN(n-Bu)2SnF, an oligomeric product [LCNSnF2(µ2-F)2]n was observed. Further addition of NH4F led to subsequent formation of 4a. The structure of fluorinated products was investigated by 1H, 19F and 119Sn NMR spectroscopy.

 

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Book Reviews

Edited by T. Takahashi. Metallocenes in Regio- and Stereoselective Synthesis (Series: Topics in Organometallic Chemistry, Vol. 8). Springer, 2005, 244 pp; ISBN 3-540-01606-6 (hardcover) (p 233)
Thomas Lazar
Published Online: Feb 20 2006 5:09AM
DOI: 10.1002/aoc.1028

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