DIPOLE-MOMENTS OF SOME METAL-COMPLEXES OF 4 NEW MONOTHIO-BETA-DIKETONES

Dipole moments have been determined by static polarization measurements for the nickel(II), copper(II), zinc(II), palladium(II), platinum(II) and cobalt(III) chelates of the fluorinated monothio-β-diketones RC(SH)CHCHOF3 [R = 4′-C2H5C6H4, 4′-OC2H5C6H4, 3′,5′-(CH3O)2C6H3 and 3′, 4′, 5′-(CH3O)3C6H2]. The moments indicate cis-square-planar configurations for the nickel, palladium and platinum complexes. The zinc complexes have tetrahedral structures and the configuration of copper complexes lies between square-planar and tetrahedral structures. The cobalt complexes perhaps have facial-octahedral configurations. The presence of steric hindrance when R is 3′, 4′, 5′-(CH3O)3C6H2 lower the dipole moments. Such hindrance is absent with R as 3′,5′-(CH3O)2C6H3. © 1979.