Dipole moments of some metal complexes of six new monothio-β-diketones containing perfluoroalkyl group

Abstract

Dipole moments of nickel(II), palladium(II) and cobalt(III) complexes of six new monothio-β-diketones R 1C(SH) = CHCOR 2 (R 1 = phenyl, 2′-naphthyl and 2′-thienyl; R 2 = C 2F 5 and CF 2CF 2CF 3) were determined by static-polarization measurements. With same R 2 the dipole moments varies when R 1 arranged as 2′-thienyl > 2′-naphthyl > phenyl. With same R 1 the dipole moments varies as C 3F 7 > C 2F 5. The latter values are small: 0.03–0.37 D for the nickel, 0.08–0.24 D for the palladium and 0.12–0.16 D for the cobalt complexes. Nickel(II) and palladium(II) complexes definitely have cis-square-planar structures Cobalt(III) complexes perhaps have the facial-octahedral configurations.