FIRST HETEROBIMETALLIC Mn~(II)/M~(II)(M = Cu, Ni) COMPLEXES WITH OPEN-CHAIN ALIPHATIC SCHIFF-BASE LIGANDS OBTAINED BY DIRECT TEMPLATE SYNTHESIS

摘要

Four new heterobimetallic complexes [CuL~1][MnCL_4] (1), [CuL~2][MnCl_4] (2), [NiL~1][MnCl_4] (3), [NiL~2][MnCl~4] (4) (L~1 =4,6,6-trimethyl-l,9-diamino-3,7-di-aza-nona-3-ene; L~2 = l,15-dihydroxy-7,9,9-trimethyl-3,6,10,13-tetra-aza-pentadeca-6-ene) have been prepared from elemental metals, ethylenediamine dihydrochloride or its N-(2-hydroxyethyl) derivative and acetone by the template condensation reaction. All complexes have been characterized by elemental analysis, IR and UV-Visible spectroscopy. The structures of 2 and 3 have been determined by X-ray crystallography (2: Orthorhombic, Pna2_1 a = 20.136(4), b = 11.185(2), c=10.251(2)A, Z = 4;3: Orthprhombic, Pca2_1, a= 14.335(2), b = 11.405(2), c = 11.154(2)A, Z = 4 ). Both crystals consist of alternating complex cations [ML]~(2+) and anions [MnCl_4]~(2-) linked together by N-H- centre dot centre dot centre dot -Cl-Mn and O-H- centre dot centre dot centre dot -Cl-Mn hydrogen bonds forming 2D corrugated sheets in (2) and ID helical chains in (3). Complex 2 represents the first single crystal structure elucidation of the complex containing L~2.