Phenylimidopentachloroniobate(V) Dianion with N-Allylphenylammonium Counterion

Bis[phenyl(2-propenyl)ammonium] pentachloro(phenylimido)niobate(V), (C9H12N)(2) [NbCl5 (C6H5N)], is a product of the reaction of niobium pentachloride and N-allylphenylamine. The coordinated secondary amine loses its allyl group and forms an imino bond to the metal. Unreacted N-allylphenylamine behaves as a proton acceptor and is a counterion in the solid state. In the crystalline state, the asymmetric unit consists of two octahedral pentachloro(phenylimido)niobate(V) dianions and four N-allylphenylammonium cations.