Synthesis and molecular structures of complexes of TlBrI2 with pyridine N-oxide and some substituted pyridine N-oxides

Abstract The following compounds, TlBrI 2 (PyO) 2 , TlBrI 2 (2-PicO) 2 , TlBrI 2 (3-PicO) 2 , TlBrI 2 (4-PicO) 2 , TlBrI 2 (4-Cl-PyO) 2 , TlBrI 2 (4-CN-PyO) 2 , TlBrI 2 (4-NO 2 -PyO) 2 and TlBrI 2 (4-CH 3 O-PyO) 2 , have been prepared and characterized by elemental analysis. The solids behave as non-electrolytes in acetonitrile solution and are monomers in benzene. Vibrational (IR and Raman) spectra suggest that the most probable structure is that of a trigonal bipyramid with the halogen atoms in equatorial positions and the two ligands in axial positions.