METAL SUPPORTED MACROCYCLES - SYNTHESIS AND CHARACTERIZATION OF SOME NEW 1,3-BIS(BENZIMIDAZOL-1-YL-METHYLENE)BENZENE AND ,4-BIS(BENZIMIDAZOL-1-YL-METHYLENE)BENZENE-BRIDGED METAL(II) CATION COMPLEXES

Two new non-chelating bidentate ligands 1,3-bis(benzimidazol-1-yl-meth ylene)benzene, hereafter 1,3-BIX, and 1,4-bis[benzimidazol-1-yl-methyl ene]benzene, hereafter 1,4-BIX, have been synthesized and their comple xes with M(II) salts (M = Co, Ni, Cu, Zn, Pd and Pt) have been prepare d and characterized using elemental analysis, magnetic moment measurem ent, IR, UV-vis and C-13 NMR and FAB-MS (in some cases) studies. Cu-II , Pd-II and Pt-II metal ions yield dinuclear square-planar complexes v iz. [enM(BIX)](2)X(4) (en = 1,2 diaminoethane; M = Pd or Pt, X = NO3; M = Cu, X = ClO4, BIX = 1,3- or 1,4-BIX). Co-II chloride forms dimeric tetrahedral [Co(BIX)Cl-2](2), whereas Ni-II and Zn-II chlorides yield polymeric [M(BIX)Cl-2](n) complexes. Copyright (C) 1997 Elsevier Scie nce Ltd.