A STUDY OF THE STRUCTURE AND PROPERTIES OF MIXED-LIGAND Cu(II) COMPLEXES WITH HEXAFLUOROACETYLACETONE AND METHYL-, PHENYL-KETOIMINES
P. A. Stabnikov, I. V. Korolkov, V. V. Krisyuk, I. A. Baidina
Keywords: mixed-ligand copper(II) complexes, crystal structure, molecular packing, volatility
Abstract
The synthesis and X‑ray single crystal study of two mixed-ligand Cu(II) complexes are performed: (CH3C(NCH3)CHC(O)CH3)(CF3C(O)CHC(O)CF3)Cu (1) (space group P21/c , a = 7.0848(12) Å, b = 17.854(3) Å, c = 11.837(2) Å, β = 100.495(6)°, V = 1472.4(4) Å3, Z = 4), (CH3C(NC6H5)CHC(O)CH3)⋅(CF3C(O)CHC(O)CF3)Cu (2) (space group P-1, a = 9.1119(4) Å, b = 9.6954(4) Å, c = 11.1447(6) Å, α = 113.784(2)°, β = 92.383(2)°, γ = 95.402(2)°, V = 893.52(7) Å3, Z = 2). The structures are molecular, formed from neutral mixed-ligand copper complexes. The central copper atom has the (3O+N) coordination environment with average Cu–O distances of 1.948 Å and Cu–N of 1.932 Å; the chelate O–Cu–N angle (average) is 94.0°. In the structures, the complexes are linked into dimeric associates with Cu…Cu distances of 3.197 Å (for 1) and 3.246 Å (for 2). The volatility of mixed-ligand complexes 1 and 2 is in between of that of the starting homo-ligand complexes.
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