CRYSTAL STRUCTURE OF ADDUCTS OF COPPER(II) ACETYLACETONATE AND HEXAFLUOROACETYL- ACETONATE WITH 4-AMINOPYRIDINE
P. A. Stabnikov, G. I. Zharkova, N. I. Alferova, A. P. Zubareva, E. A. Shusharina, N. V. Pervukhina
Keywords: copper(II) ?-diketonates, 4-aminopyridine, crystal structure
Pages: 378-382
Abstract
Single crystal X-ray diffraction is used to investigate two synthesized β-diketonate complexes of copper(II) with aminopyridine: Cu(4-NH2Py)(aa)2 (I) and Cu(4-NH2Py)(hfa)2 (II). The crystals of I and II have a monoclinic system; the unit cell parameters of I are: P21/n space group, a = 8.2921(3) Å, b = 14.7243(5) Å, с = 13.4970(4) Å, β = 102.426(1)°, V = 1609.32(9) Å3, Z = 4; for II: С2/c space group, a = 23.5704(5) Å, b = 11.4977(2) Å, с = 16.0285(3) Å, β = 109.265(1)°, V = 4100.6(1) Å3, Z = 8. The structures of I and II are molecular; they are composed of isolated molecules. The coordination polyhedron of the copper atom is formed by the О atoms of two acetylacetonate ligands (Cu-O 1.940(2)-2.171(2) Å) in I and the O atoms of two hexafluoroacetylacetonate ligands (Cu-O 1.940(2)-2.215(3) Å) in II. The molecules of 4-NH2Py are bonded to the copper atom via the nitrogen atom of the aromatic ring (Cu-N 2.008(2) Å in I and Cu-N 1.978(3) Å in II). Noncoordinated amino groups join the molecules of the complexes together by means of N-H…O hydrogen bonds.
|
