SYNTHESIS, PROPERTIES AND MOLECULAR-STRUCTURES OF IRON(III), COBALT(II), NICKEL(II), COPPER(II), COPPER(I) AND ZINC(II) COMPLEXES WITH N,N-BIS(PYRAZOL-1-YLMETHYL)BENZYLAMINE

A newly prepared ligand, N,N-bis(pyrazol-1-ylmethyl)benzylamine (L) re acted with metal ions to form [FeLCl(3)], [NiL(NCS)(2)MeOH)], [MLX(2)] (M = Co-II, Cu-II or Zn-II, X = Cl-, Br- or NCS-) and [(CuLI)(2)]. Th e crystallographically determined structures of [(CoLCl(2)] and [CoL(N CS)(2)] reveal the co-ordination sphere of cobalt(II) to be intermedia te between distorted tetrahedral and trigonal bipyramidal. In [NiL(NCS )(2)(MeOH)] the co-ordination sphere of nickel(II) ion is distorted oc tahedral while that of copper(II) in [CuLCl(2)] is distorted square py ramidal. The complex [(CuLI)(2)] displays distorted tetrahedral geomet ry around copper(I), and [ZnLBr(2)] shows distorted tetrahedral geomet ry around zinc(II).