ScienceAsia 18 (1992): 163-173 |doi: 10.2306/scienceasia1513-1874.1992.18.163

SYNTHESES AND CHARACTERISATION OF COMPLEXES [Cu(dpyam)₂ (0₂CCH₃)]X, X = [NO₃3]^-, [O₂CCHg]^-, Cl^-, Br^-, I^- AND [PF₆]^-. CRYSTAL STRUCTURE OF [Cu(dpyam)₂ (0₂CCH₃)] [NO₃]

SUJITTRA ADULDECHA^a AND BRIAN HATHAWAY^b

ABSTRACT: The complexes [Cu(dpyam)₂ (0₂CCH₃)]X, X=[NO₃3]^-[I], [CH₃C0₂]^-[II], Cl^-[III], Br^-[IV], I^-[V] and [PF₆]-[VI], were prepared directly from their components. A single crystal structural analysis of [I] has been performed and is the first reported crystal structure of this series involving the di-2-pyridylamine (dpyam) and acetate ligands. [1] crystallises in the monoclinic space group P2₁/C with a = 13.216(3), b = 8.068 (2), C = 22.161(4) A, = 92.011 (3), U = 2361.50 A³, D_m = 1.50, D_c = 1.48 Mg m^-3 and Z = 4. R = 0.0477 for 1887 unique reflections. The structure involves a cis-ocrahedral CuN₄0₂ chromophore, but with very asymmetrically coordinated OXO groups, .10 = [Cu^-O(2)]^-[Cu.0(1)] = 0.643 (8) A. The structure of [I] is best described as a square-pyramidal cis-distorted octahedron (4 + 1 + 1*). Details of the syntheses and electronic spectra are discussed for allcomplexes.

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a Chemistry Department, Khon Kaen University, Khon Kaen, Thailand
b Chemistry Department, University College, Cork, Ireland.

Received March 19, 1990