Preparation, fluxional behaviour, and decomposition of bis(cyclopentadienyl)iodonitrosylvanadium. X-Ray crystal structure of [(cpVI)2{cpV(NO)}2(µ-O)4]

Abstract

cp₂VX(NO)(cp = C₅H₅,X = Br, I) are fluxional molecules in which linear and bent VNO groups interconvert; the molecule with the linear VNO group necessarily contains at least one ring with less than η₅hapticity, While cp₂VI(NO) decomposes in vacuo in tetrahydrofuran solution to give [(cpVI)₂{cpV(NO)}₂(µ-O)₄]whose X-ray crystal structure is reported.