Studies in Boron-Oxygen, Boron-Nitrogen and Boron-Sulphur Bonded Complexes

Abstract

Reactions of 2-isopropoxy-1,3,2-benzodioxaborole and 2-isopropoxy-1,3-dithiaborole with benzaldehyde-2-mercaptoanil in equimolar ratio and salicylaldehyde-2-mercaptoanil and 2-hydroxyacetophenone-2-mercaptoanil in 1:1 and 2:1 (boron: ligand) molar ratios have yielded a new class of coordination compounds of boron. The resulting (where Z = C₆H₄ and Z¹ = C₂H₄) types of complexes are sharp melting, coloured solids. These were characterized on the basis of elemental analyses, molecular weight determinations and conductance measurements. The mode of bonding in these complexes has been discussed with the help of IR, ¹H NMR, ¹¹B NMR and mass spectral studies.