Reactions of 16-electron bis-acetylene molybdenum and tungsten complexes with isocyanides, dienes, and trispyrazolylborate anion; crystal and molecular structure of [Mo{(C3H3n2)2C3(CF3)3CH(CF3)}(η5-C5H5)]

Abstract

Complexes [MX(CF₃C₂CF₃)₂(η⁵-C₅H₅)] react with (a) isocyanides to form N-alkyltetrakis(trifluoromethyl)-cyclopentadienimine compounds (M = Mo, X = CF₃; M = W, X = Cl), (b) buta-1,3-diene to give a 17-electron complex (M = Mo, X = Cl), and (c) potassium trispyrazolylborate to give an unusual electronegatively substituted η³-allylic system, (M = Mo, X = Cl), the identity of which has been established by a single crystal X-ray diffraction study.