Halide abstraction from [(η5-C5H5)NbCl4] leading to novel cationic niobium(V) species: crystal structure of the ‘double’ hexachloroantimonate(V) salt [(η5-C5H5)NbCl(MeCN)4]3+[(η5-C5H5)Nb(MeCN)6]4+[SbCl6]7·7MeCN
Abstract
Sequential removal of chloride ions from [(η5-C5H5)NbCl4] can be realised using antimony(V) chloride in acetonitrile under controlled stoichiometry; the formation and structural characterisation of the novel Nb(V) cations [(η5-C5H5)NbCl(MeCN)4]3+ and ([η5-C5H5)Nb(MeCN)6]4+ are described.