Alkyne oligomerization catalyzed by molybdenum(0) complexes

被引：35

作者：

Ardizzoia, GA

Brenna, S

LaMonica, G

Maspero, A

Masciocchi, N

机构：

[1] Univ Milan, Dipartimento Chim Inorgan Metallorgan & Anali, I-20133 Milan, Italy

[2] Univ Insubria, Dipartimento Sci Chim Fis & Matemat, I-22100 Como, Italy

[3] Univ Milan, Dipartimento Chim Struttural & Stereochim Inorgan, I-20133 Milan, Italy

来源：

JOURNAL OF ORGANOMETALLIC CHEMISTRY | 2002年 / 649卷 / 02期

关键词：

molybdenum; cyclotrimerization; catalysis; powder diffraction; crystal structure;

D O I：

10.1016/S0022-328X(02)01114-2

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

Three new molybdenum(0) complexes, [Mo(CO)(3)(Hpz)(3)] (1), [Mo(CO)(2)(Hpz)(2)(DMAD)(2)] (2), (DMAD = dimethyl acetylenedicarboxylate) and [Mo(CO)(3)(1-Me-imidazole)(3)] (3) were synthesized and characterized. Their activity and selectivity in alkyne cyclotrimerization and co-trimerization reactions was investigated. The molecular structures of 1 and 2 have been determined by unconventional powder and standard single-crystal diffraction methods, respectively. 1 consists of a pseudo-octahedral complex of C-3 symmetry, with the ligands in fac disposition; complex 2, of idealized C-2 symmetry, is obtained by substitution of one CO and one pyrazole in 1 by two DMAD ligands, and shows the rare trans configuration of pi-bound acetylenic moieties. (C) 2002 Published by Elsevier Science B.V.

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页码：173 / 180

页数：8

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