Synthesis and characterization of rhenium(III) and (V) pyridylimidazole complexes

被引：40

作者：

Gerber, TIA ^{[1
]}

Hosten, E

Mayer, P

Tshentu, ZR

机构：

[1] Univ Port Elizabeth, Dept Chem, ZA-6000 Port Elizabeth, South Africa

[2] Univ Munich, Dept Chem, D-81377 Munich, Germany

来源：

JOURNAL OF COORDINATION CHEMISTRY | 2006年 / 59卷 / 03期

关键词：

rhenium(III); rhenium(V); oxo-bridge; crystal structure; bidentate N; N;

D O I：

10.1080/00958970500069063

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

Reaction of trans-[ReOCl3(PPh3)(2)] with 2-(2'-pyridyl) imidazole (pimH) in methanol led to the isolation of the rhenium(III) salt [ReCl2(pimH)(PPh3)(2)](ReO4) (1). However, with 2-(2'-pyridyl)- 1-methylimidazole (pimMe) as ligand, the complex [ReCl3(pimMe)(PPh3)] (2) was obtained. The monooxorhenium(V) complexes [ReOCl3(pimR)] (R = H, Me) could only be prepared by the reduction of [ReO4](-) with an equimolar amount of PPh3 in the presence of pimR and hydrochloric acid in acetic acid. With four equivalents of PPh3, compounds 1 and 2 were obtained. Using (n-Bu4N)[ReOCl4] as starting material, the mu-oxo dimers [Re2O3(pimR)(2)Cl-4] were isolated as the only products. These new compounds have been characterized by X-ray crystallography, (HNMR)-H-1 and IR spectroscopy. In 1 the [ReO4](-) counterion is tightly associated with the cationic complex through N-(HReO3-)-Re-... hydrogen bonding. Despite being paramagnetic, (HNMR)-H-1 spectra for 1 and 2 could be fully assigned.

引用

页码：243 / 253

页数：11

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