Abstract
New palladium nitrosyl carboxylate complexes Pd 8(CO) 4− m (NO) m (NO 2) 4(RCO 2) 8 ( m = 2, 4) were obtained by the treatment of palladium carbonyl carboxylates clusters cyclo-Pd n (μ-CO) n (μ-RCO 2) n ( n = 6) ( 1) with gaseous nitrogen monoxide. These complexes are the products of CO substitution in early described Pd 8(CO) 4(NO 2) 4(RCO 2) 8 clusters. By adding an excess of corresponding acid to reaction mixture Pd 4(CO) 2(NO)(RCO 2) 5 complexes were obtained, their structures were determined by X-ray diffraction analysis. These clusters are intermediate products of transformation of 6-nuclear initial clusters into various 8-nuclear complexes. This fact demonstrates that carboxylate ligands can be used as stabilizers for intermediate unstable polynuclear palladium compounds.
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