Abstract
Trinuclear copper(II) complexes with diacyldihydrazines of aliphatic dicarboxylic acids (from succinic acid to heptadioic acid) and salicylic acid were synthesized. The complexes were studied by chemical analysis, thermogravimetry, and IR spectroscopy. The structure of trinuclear copper(II) complex with diacylhydrazine of glutaric and salicylic acids of the [Cu3L3 · 4Py] · 2Py composition was determined by X-ray crystallography. The complex has a molecular structure and contains three nonequivalent copper atoms. The Cu(2)...Cu(3) distance is 8.506 A; the Cu(2)...Cu(1) and Cu(3)...Cu(1) distances are 4.612 and 4.588 A, respectively. The coordination polyhedra of two copper atoms are tetragonal pyramids, and the third copper atom has a square environment. An interest feature of the complex under study is the induced closure of the bent eight-membered chelate ring containing carbon atoms of a polymethylene spacer.
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