piano stool geometry in the solid state by coordination of one additional acetonitrile molecule to molybdenum. The same geometry is observed upon reaction of [1]BF4 and [2]PF6 with 2,6-dimethylphenyl isocyanide (XyNC) to afford the isocyanide complexes [1(CNXy)]BF4 and [2(CNXy)]PF6. Their CN stretching vibrations are observed at 2041 and 2030 cm−1, confirming the electron richness and strong π-electron-releasing
配体1,2-双(1,3-
二异丙基-4,5-二甲基
咪唑啉-2-亚
氨基)
乙烷(BL i Pr)与1,2-双(1,3,4,5-四甲基
咪唑啉-的反应2-亚
氨基)
乙烷(BL我)与
环庚三烯基-
钼配合物[(η 7 -C 7 ħ 7)的Mo(CH 3 CN)3 ] X(X = BF 4,PF 6)导致
乙腈取代并形成稳定16电子半夹心络合物(η 7 -C 7 ħ 7)的Mo(BL我
镨)] BF 4,[ 1 ] BF 4和[(η 7-C 7 H 7)Mo(BL Me)] X,[ 2 ] X(X = BF 4,PF 6),其中两个可以在晶体学上表征为揭示未变形的两足钢琴凳的几何形状。循环伏安法研究显示,相对于
二茂铁/
二茂铁对(0 V),E °= −1.095 V和E °= −1.138 V的负氧化还原电位非常负,这表明电子富集的
金属络合物非常高。[氧化2 ] X具有(η 7 -C 7 ħ 7)BF 4或[
铁(η