Some reactions and spectroscopic studies of tris(pentafluorophenyl)arsenic and -antimony(III and V) derivatives

The reactions of tris(pentafluorophenyl)arsenic(III) with iodine monochloride, iodine monoazide, and dithiocyanogen yielded corresponding oxidative-addition products of the type (C6F5)3As(V)XY (X=I, Y=Cl, N3; X=Y=NCS). The elemental sulphur also added oxidatively with tris(pentafluorophenyl)arsenic(III) yielding tris(pentafluorophenyl)arsine(V) sulphide. Some displacement reactions were also carried out to synthesize mixed pseudohalide derivatives of the type (C6F5)3M(N3)NCS (M=As and Sb) and their insertion reactions were studied with phenyl isothiocyanate which yielded the corresponding 1,2-cycloaddition products, i.e. tetrazole-5-thiones. The compounds were characterized by elemental analysis, molar conductance, UV, IR and 19F NMR spectroscopic studies.