A NEW POLYMERIC COMPOUND CONTAINING COPPER(II)-CHLORANILATE CHAINS - SYNTHESIS, CRYSTAL-STRUCTURE AND MAGNETIC-PROPERTIES OF [CU(DCMB)(CA)](N) (DCMB=3,3'-DICARBOMETHOXY-2,2'-BIPYRIDYL, CA EQUALS DIANION OF 3,6-DICHLORO-2,5-DIHYDROXY-1,4-BENZOQUINONE)

The crystal structure of the one-dimensional complex [Cu(DCMB)(CA)](n) , where DCMB=3,3'-dicarbomethoxy-2,2'-bipyridyl, CA=dianion of chloran ilic acid, has been determined by X-ray diffraction at room temperatur e. The compound crystallizes in the monoclinic system, space group C2/ c (No.15), with a=13.633(2), b=12.773(3), c=12.722(6) Angstrom, beta=9 9.65(3)degrees and Z=4. The copper atoms are coordinated in a distorte d octahedral arrangement by two nitrogen atoms of DCMB and four oxygen atoms of the bridging, bis-chelating CA ligands. Thereby infinite 'zi gzag' chains are formed consisting of Cu2+ and the chloranilate dianio ns. The magnetic susceptibility of the compound has been investigated between 280-4.2 K. The magnetic data are well reproduced using the exp ression for isotropically coupled S=1/2 ions in antiferromagnetic chai ns. The exchange coupling constant (2J) and the g value were estimated to be -0.31(2) and 2.33(1) cm(-1), respectively.