SYNTHESES AND PROPERTIES OF SOME FIVE-AND SIX-COORDINATE COPPER(II) COMPLEXES WITH ACETYLACETONATE AND THE STRUCTURAL CHARACTERISATION OF A BIGUANIDE-ACETYLACETONATE DOUBLE SALT

Autor:	H. Pritzkow, S. K. Hota, C.R. Saha
Rok vydání:	1984
Předmět:	Diketone Acetylacetone Inorganic chemistry chemistry.chemical_element Crystal structure Copper Double salt chemistry.chemical_compound Crystallography chemistry X-ray crystallography Materials Chemistry Orthorhombic crystal system Physical and Theoretical Chemistry Single crystal
Zdroj:	Journal of Coordination Chemistry. 13:131-142
ISSN:	1029-0389 0095-8972
DOI:	10.1080/00958978408079765
Popis:	Compounds of formulae [M(Hbg)2] [Cu(acac)2 X]2 (1) and [Ni(Rbg)2] [Cu(acac)2 Cl2] (2) (acac = acetylacetonate, X = Cl, Br, I; M = Cu, Ni; Hbg = biguanide, Rbg = N-alkylbiguanide, R = CH3 C2 H5) have been prepared by the interaction of the respective chelates in methanol. The presence of five and six coordinate copper(II) in the anions of (1) and (2) respectively is suggested from their conductance data, electronic and vibrational spectra, magnetic moments and thermal analyses. Compound (1), where M = Cu and X = Cl has been characterized by single crystal X-ray crystallography. Crystals are orthorhombic, space group Pbca with Z = 4 with a = 15.218(2), b = 15.986(3), c = 14.565(3)A. The structure was solved by Patterson and Fourier methods and refined by least-squares methods to R = 0.052 and RW = 0.052 for 4267 reflexions and R = 0.065 for all 5206 reflexions. The structure consists of square-planar [Cu(Hbg)2]2+ cations and square-pyramidal [Cu(acac)2 Cl]− anions. The nonhydrogen atoms of the cati...
Databáze:	OpenAIRE
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