Synthesis of bis(pyrazol-1-yl)methanes with organogermyl and organosilyl groups on the methine carbon and their reaction with W(CO)5(THF). X-ray crystal structures of Ph3GeCHPz2W(CO)4 and Me3SiCHPz2W(CO)4 (Pz=3,5-dimethylpyrazole)
作者:Liang-Fu Tang、Wen-Li Jia、Xue-Mei Zhao、Pan Yang、Ji-Tao Wang
DOI:10.1016/s0022-328x(02)01658-3
日期:2002.9
partial decomposition of ligands to yield a certain amount of PzW(CO)5 as by-products. These new ligands and complexes have been characterized by 1H-NMR, IR and elemental analysis. The molecular structures of complexes Ph3GeCHPz2W(CO)4 and Me3SiCHPz2W(CO)4 (Pz=3,5-dimethylpyrazole) have been determined by X-ray structure analysis, indicating that bis(pyrazol-1-yl)methanes act as chelating bidentate
在次甲基碳上具有有机锗基和有机甲硅烷基的一系列新的双(吡唑-1-基)甲烷配体MCHPz 2(M = Ph 3 Ge,PhMe 2 Si,i Pr 3 Si或Me 3 Si; Pz = 3, 5-二甲基吡唑或3,4,5-三甲基吡唑是通过双(吡唑-1-基)甲基锂与三苯基溴化锗和有机甲硅烷基氯的反应制得的。在回流的THF中用W(CO)5(THF)处理这些配体产生了新的杂双金属配合物MCHPz 2 W(CO)4作为主要产物,伴随有配体的部分分解产生一定量的PzW(CO)5作为副产品。这些新的配体和络合物已通过1 H-NMR,IR和元素分析进行了表征。通过X射线结构分析确定了配合物Ph 3 GeCHPz 2 W(CO)4和Me 3 SiCHPz 2 W(CO)4(Pz = 3,5-二甲基吡唑)的分子结构,表明双(吡唑-1 -基)甲烷在这些络合物中充当螯合双齿配体,有机金属基团位于次甲基碳的轴向位置。