EXTENDED NETWORK VIA HYDROGEN-BOND LINKAGES OF ZIGZAG COORDINATION CHAINS MU-OH)(MU-H2O))(N)](N-2(TRANS-OXEN)(MU-OCN)(2)](N) [H(2)OXEN = N,N'-BIS(2-AMINOETHYL)-OXAMIDE]() OR [CU)

The trans-oxamidato-bridged polymeric complexes [Cu-2(trans-oxen)(mu-O H)(mu-H2O)(n)Br-n . 2nH(2)O 1 and [Cu-2-(trans-oxen)(mu-OCN)(2)](n). . nH(2)O 2 [H(2)oxen = N,N'-bis(2-aminoethyl)oxamide] with zig-zag co-o rdination chains were synthesized and characterized by single-crystal X-ray diffraction methods. The cationic chains [{Cu-2(trans-oxen)(mu-O H)(mu-H2O)}(n)](n+) in 1 bridged alternately by trans-oxamidate, mu-OH and mu-H2O arranged in three directions intersect with one another to yield an extended network via the interchain hydrogen bonds formed by metal-co-ordinated OH- and H2O and the solvate water molecules with t he linkages Cu-OH OH-Cu and Cu-H2O...H2O...H2O-Cu. The neutral chains [Cu-2(trans-oxen)(mu-OCN)(2)](n) in 2 bridged alternately by trans-oxa midate and double cyanate bridges in an asymmetric M-bonded end-on mod e are joined together by bridging H2O molecules via the hydrogen bond linkage Cu(oxen)...H2O...(oxen)Cu to produce the extended network stru cture. The magnetic calculations showed the presence of antiferromagne tic couplings between the copper(II) ions through both the trans-oxami date and mu-OH or cyanate bridges.