Donor-acceptor compounds. IX. Pyridine, 2-,3- and 4-methylpyridine n-oxides complexes with SbCl3 and SbCl5.

Article abstract of DOI:10.1016/S0020-1693(00)91086-7

The interaction of SbCl₃ with pyridine, 2-, 3- and 4-picoline N-oxides by spectrophotometric, dielectrometric and conductometric titrations has been investigated. The formation of complexes in 1:1 and 1:2 molar ratio for SbCl₃ and adducts 1:1, when the acceptor was SbCl₅, is confirmed. The dipole moments of the formed complexes have been calculated. The following adducts: SbCl₃ · PyO, SbCl₃ · (4-PicO)₂, SbCl₅ · PyO, SbCl₅ · 2-PicO, SbCl₅ · 3-PicO, and SbCl₅ ·(4-PicO) have been isolated and their most significatives IR frequencies are reported and assigned. Those located within 600-250cm^-1 range are consistent with a C^4v symmetry for SbCl₅ complexes. All the isolated solids are non-electrolytes in acetonitrile.