ELECTRONIC AND BONDING PROPERTIES OF ACETYLACETONATO COPPER(II) COMPLEXES - MOLECULAR STRUCTURE OF [CU(ACETYLACETONATO)(1,10-PHENANTHROLINE)(CLO4)(0.5CH(3)CN)]

摘要

The preparation and characterization of mixed ligand complexes, [Cu (acac)(NN)(ClO4)] (acac = acetylacetonate, NN = N,N,N',N'-tetramethylethylene-diamine, 2,2'-bipyridine, 1,10-phenanthroline (phen), and neocuproine), are reported. The structure of [Cu(acac)(phen)(ClO4)(0.5CH(3)CN)] determined from three-dimensional X-ray diffraction data comprises discrete square pyramidal [Cu(acac)(phen)(ClO4)] and [Cu (acac)(phen)(CH3CN)](ClO4) units, with the perchlorate or the CH3CN on the apex. The CH3CN is coordinated in an unusual bent mode with a Cu-N-C angle of 129.2(9)degrees. Analysis of the electronic spectra of the complexes suggests the sequence of d orbitals as d(xy) d(z)2 > d(x)2(-y)2 similar to d(xz) > d(yz). In these square pyramidal complexes, acetylacetonate ligands are pi donors whilst heterocyclic diimines are not participated in pi interactions. [References: 45]