Mono- and bimetallic chromium(III) complexes containing 2,3,5,6-tetrakis-(α-pyridyl)pyrazine as a tridentate ligand:: synthesis and spectroscopic characterization

被引：6

作者：

Bitzer, R

Filgueiras, CAL

Lopes, JGS

Santos, PS

Herbst, MH

机构：

[1] Univ Fed Rio de Janeiro, Inst Quim, Dept Quim Inorgan, BR-21945970 Rio De Janeiro, Brazil

[2] Univ Sao Paulo, Inst Quim, Inst Milenio Mat Complexos, Lab Espectroscopia Mol, BR-05513970 Sao Paulo, Brazil

[3] Univ Fed Rio de Janeiro, Inst Fis, Dept Fis Solidos, BR-21945970 Rio De Janeiro, Brazil

来源：

TRANSITION METAL CHEMISTRY | 2005年 / 30卷 / 05期

关键词：

D O I：

10.1007/s11243-005-6737-9

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

We have investigated the reactions between 2,3,5,6-tetrakis(alpha-pyridyl)pyrazine (TPP) and CrCl3 center dot 6H(2)O in 1:2 and 2.6:1 (Cr-III:TPP) stoichiometric ratios. The resulting products, [Cr(TPP)Cl-3] (1) and [(CrCl3)(2)-mu-TPP] (2), respectively, have been characterized by elemental and thermogravimetric analyses, molar conductivities, vibrational and electronic spectroscopy, and powder e.p.r. spectroscopy at room temperature. In both (1) and (2), TPP behaves as a tridentate ligand. Whereas (1) is a monometallic species with three uncoordinated nitrogen atoms, (2) is bimetallic with TPP as a bridging ligand.

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页码：636 / 642

页数：7

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