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• 189813-72-7 bis(1-methyl-4,5-diphenylimidaz-2-olyl)(benzyloxy)methane 

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Synthesis and Coordination Chemistry of the Bis(imidazole) Ligand, Bis(1-methyl-4,5-diphenylimidaz-2-oyl)(benzyloxy)methane

The synthesis and characterization of the new Lmidazole ligand bis(1-methyl-4,5-diphenylimidaz-2-oyl)(benzyloxy)methane (BimOBz) and its copper(II) complexes [Cu(BimOBz)2][BF4]2·2H2O), (1·2H2O), [Cu(BimOBz)(NO3)2]·CH2Cl2 (2·CH2Cl2) and [Cu(BimOBz)Cl2]·2EtOH (3·2EtOH) are presented. The X-ray crystallographic parameters determined are as follows: 1·solv (solv = petroleum ether) C84H66N8B2CuF8O 2, 1456.65, monoclinic space group (P21/a), a = 20.862(8) A?, b = 19.110(5) A?, c = 22.452(9) A?, β= 110.09(3)°, Z = 4, R = 0.129, and Rw = 0.139. 2·CH2Cl2, C41H36N6Cl2O7, 859.22, monoclinic space group (P21/c), a = 9.748(1) A?, b= 14.157(5) A?, c = 17.209(2) A?, β= 103.709(8)°, Z = 4, R = 0.066, and Rw = 0.087. 3·2EtOH, C44H38N4Cl2CuO2, 789.26, monoclinic space group (P21/a), a = 17.171(5) A, b = 13.988(3) A?, c = 17.897(5) A?, β= 112.52(2)°, Z = 4, R = 0.084, and Rw = 0.092. The geometry at these CuII centers is distorted tetrahedral in 1 and 3 and essentially square-planar in 2, and this difference is reflected in their EPR spectra, especially the value of Az; 1 (solid, gx = 2.06. gy = 2.13, gz = 2.30, Az = 94 × 10-4 cm-1), 3 (CH2Cl2, 77 K, gx = gy = 2.06, gz = 2.37, Az = 75 × 10-4 cm-1), 2 (solid, gx = gy = 2.06, gz = 2.28, Az = 169 × 10-4cm-1). 1 displays a reversible, one-electron CuII/CuI couple in CH2Cb and MeCN at potentials of +0.62 and +0.49 V vs SCE, respectively.