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Crystal chemistry of complex Cu(II) compounds. I. Mechanism of substitution reactions

F.Hanic

Slovak Academy of Sciences, Bratislava

 

Abstract: Crystal chem. structure of [Cu2(OAc)4(H2O2)2] (Van Niekerk and Schoening, CA 47, 6727g) and of [Cu2(OAc)4(C5H5N)2] were studied and compared. Substitution in complex Cu(II) compds. occurs at the position of the weakest bound ligand. As soon as the substituting ligand (L1) with a strong field enters the coordination sphere of Cu, the weakest bound ligand (L2) is orientated trans to ligand L1 and thus the trans position becomes most susceptible to substitution with addnl. ligand L1. Cis derivs. form only with chelating ligands such as ethylenediamine or o-phenylenediamine. The crystal field of complex Cu(II) compds. should be regarded as a dynamic system, which changes by the effect of new substituents entering the crystal field so that a pair of weak bonds can be orientated in the direction of all 3 axes of the co.ovrddot.ordination octahedron.

Full paper in Portable Document Format: 151a14.pdf (in Slovak)

 

Chemical Papers 15 (1) 14–19 (1961)

Thursday, May 23, 2024

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