MAGNETOSTRUCTURAL CHARACTERIZATION OF CU-4(PRZ)2(L)2CL-CENTER-DOT-CH3CH2OH (LH=1,1-DI-2-PYRIDYL-1-ETHOXIMETHANOL, PRZH=PYRAZOLE)

The title compound, Cu2C17H16O2.5Cl2, is a copper(II) complex, in which each dimeric unit has two copper atoms bridged by a pyrazolato ligand, a di(2-pyridyl)]methane ligand, and an oxygen atom from the modified methylene group that links the two pyridine rings (O-C-O-CH2CH3). The complex crystallizes in the monoclinic group P2(1)/n, a = 7.7330(1), b = 19.589(6), c = 13.123(2)Angstrom, beta = 95.020(0)degrees, V = 1980.3(7)Angstrom(3), Z = 4, Fw = 514.3, D-0 = 1.725 g cm(-3) lambda(Mo K alpha) = 0.71073 Angstrom, F(000) = 1032, mu = 2.44 mm(-1), R = 0.044 for 2209 observed reflections, Rw = 0.047, s = 0.086. Each dimer is linked to the next unit by long chlorine bonds (Cu(2')-Cl(1) = 2.846(2)Angstrom). These tetrameric units form zigzagged chains through copper-chlorine bonds of 3.380(2)Angstrom. The copper(II) complex presents antiferromagnetic behavior with T(M) = 161 K.