Complexes of niobium pentachloride with the Schiff bases

Complex compounds of niobium pentachloride with azomethines on the basis of β-hydroxynaphthaldehyde and aromatic amines have been synthesized for the first time. The data of the element analysis and physicochemical investigations have shown that the above complexes are the compounds of molecular type with coordination by nitrogen atom of azomethine. The Nb(5) coordination number is 6,7 and 8. The ratio of NbCl5:L is 1:1 and 1:2 in the complexes The compound with 1:3 ratio has been obtained for β-hydroxynaphthalaniline. All the complexes are diamagnetic. The dependence of specific and molecular electric conductivity of complex solutions in dimethylformamide on the temperature has been studied. It is shown that specific conductivity in diluted solutions decreases, while molecular electric conductivity increases over the parabolic curve with the temperature increase. The conductivity of complexes with 1:2 composition is higher than that with the composition of 1:1. Studied are derivatograms of the complexes, as well as their infrared spectra