|
|||||
|
|
Alkyne oligomerization catalyzed by molybdenum(0) complexes |
|
| Authors: | G.Attilio Ardizzoia S Brenna G LaMonica A Maspero N Masciocchi |
| Affiliation: | a Dipartimento di Chimica Inorganica, Metallorganica ed Analitica, Università di Milano, Via Venezian 21, 20133 Milan, Italy b Dipartimento di Scienze Chimiche, Fisiche e Matematiche, Università dell'Insubria, Via Valleggio 11, 22100 Como, Italy c Dipartimento di Chimica Strutturale e Stereochimica Inorganica, Università di Milano, Via Venezian 21, 20133 Milan, Italy |
| Abstract: | 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 C3 symmetry, with the ligands in fac disposition; complex 2, of idealized C2 symmetry, is obtained by substitution of one CO and one pyrazole in 1 by two DMAD ligands, and shows the rare trans configuration of π-bound acetylenic moieties. |
| Keywords: | Molybdenum Cyclotrimerization Catalysis Powder diffraction Crystal structure |
| 本文献已被 ScienceDirect 等数据库收录！ | |