Synthesis and characterization of boron complexes of nitrogen, oxygen and sulphur donor ligands

Abstract

The 1:1 and 1:2 molar reactions of triisopropoxyborane with ONO and ONS donors, semicarbazones and thiosemicarbazones of 2-hydroxy-2-phenylacetophenone and 3-hydroxy-2-butanone, lead to the formation of (Pr<em>ⁱ</em>O)B(ONO), (ON OH)B(ON O), (Pr<em>ⁱ</em>O)B(ON S)and (ON S)B(ON’S) types of complexes. These have been characterized by elemental analysis, conductivity measurements and molecular weight determinations. Electronic, IR, ¹H NMR, ^l3C NMR and ¹¹B NMR spectral studies have been used to deduce the structures of the resulting boron complexes.