Nickel complexes with N2O donor ligands:: Syntheses, structures, catalysis and magnetic studies

被引：51

作者：

Chakraborty, Jishnunil

Nandi, Mahasweta

Mayer-Figge, Heike

Sheldrick, William S.

Sorace, Lorenzo

Bhaumik, Asim

Banerjee, Pradyot ^{[1
]}

机构：

[1] Indian Assoc Cultivat Sci, Dept Inorgan Chem, Kolkata 700032, W Bengal, India

[2] Indian Assoc Cultivat Sci, Ctr Adv Mat, Dept Mat Sci, Kolkata 700032, W Bengal, India

[3] Ruhr Univ Bochum, Lehrstuhl Analyt Chem, D-4630 Bochum, Germany

[4] Univ Florence, Lab Mol Magnet, Florence, Italy

来源：

EUROPEAN JOURNAL OF INORGANIC CHEMISTRY | 2007年 / 32期

关键词：

nickel; N; O ligands; epoxidation; heterogeneous catalysis; magnetic properties;

D O I：

10.1002/ejic.200700500

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

Two new terephthalato-bridged tetranuclear polymeric Ni-II complexes, namely [Ni4L41(mu-tp-kappa(4)-O)(H2O)(2)(mu-tP-kappa(2)-O)center dot 2C(2)H(5)OH center dot CH3OH center dot 3H(2)O (1) and [Ni4L42(mu-tP-kappa(4)-O)(H2O)2(mu-tp-kappa(2)-O)]center dot 3H(2)O (2) [L-1 = N-(3-aminopropyl)-5-bromosalicylaldirnine and L 2 = N-(3-aminopropyl)salicylaldimine], are reported along with the syntheses and structures of the dicyanoargentate-bridged polymeric complexes [Ni(L-1)(H2O)-{Ag(CN)(2)}](alpha) (3) and [Ni(L-3)(MeOH){Ag(CN)(2)}]alpha (4) [L-3 = N-(3amino-2,2-dimethylpropyl)-5-bromosalicylaldimine]. All four complexes are found to be effective heterogeneous catalysts for the epoxidation of alkenes such as styrene, a-methylstyrene and cyclohexene in the presence of tert-butyl hydroperoxide. The variable -temperature magnetic susceptibility measurements (300-2 K) of complex 1 show a fair degree of antiferromagnetic coupling between the Ni-II centers. ((c) Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2007)

引用

页码：5033 / 5044

页数：12