The preparation and properties of some pentachloroalkoxo complexes of niobium(IV)

Article abstract of DOI:10.1021/ic50007a031

A number of complexes of the type (BH)₂Nb(OR)Cl₅ have been prepared by electrolytic reduction of NbCl₅ in HCl-saturated alcohols, followed by the addition of alcoholic solutions of BH⁺ ions (B is an amine such as CH₃NH₂, pyridine, quinoline, etc.). All compounds show normal, spin-only paramagnetism for the d¹ ion. Spectra of aromatic -inium salts are complicated and suggest that there is an interaction with the Nb(OR)Cl₅^- ion. The interaction seems to result in weakening of the aromatic C-H and the alkoxo C-O bonds and a distortion of the complex ion to greater tetragonality.