Croatica Chemica Acta, Vol. 72 No. 2-3, 1999.
Original scientific paper
The Weak Metal-Water Bond in Diphenylborylated Organoaquacobaloximes and Rhodoximes Leads to the Formation of an Unusual Dinuclear Rh(III) Complex
Renata Dreos
; Dipartimento di Scienze Chimiche, Università di Trieste, Via L. Giorgieri 1, 34127, Trieste, Italy
Giorgio Nardin
; Dipartimento di Scienze Chimiche, Università di Trieste, Via L. Giorgieri 1, 34127, Trieste, Italy
Lucio Randaccio
; Dipartimento di Scienze Chimiche, Università di Trieste, Via L. Giorgieri 1, 34127, Trieste, Italy
Giovanni Tauzher
; Dipartimento di Scienze Chimiche, Università di Trieste, Via L. Giorgieri 1, 34127, Trieste, Italy
Sara Vuano
; Dipartimento di Scienze Chimiche, Università di Trieste, Via L. Giorgieri 1, 34127, Trieste, Italy
Abstract
The synthesis and characterization of a series of RM(DBPh2)2(H2O) complexes (M = Co and Rh) and the X-ray structure of the dinuclear [n-PrRh(DH)(DBPh2)]2 (1) obtained by recrystallization of n-PrRh(DBPh2)2(H2O) in non coordinating solvent are reported.
The crystals of (1) are built up by neutral centrosymmetric dinuclear [n-PrRh(DH)(DBPh2)]2 units and CH2Cl2 crystallization molecules in the ratio 1:1. The Rh ion of one n-PrRh(DH)(DBPh2) unit achieves hexacoordination by coordination of one of the oxime O at-oms of the other unit. The formation of the dimer by recrystallization of n-PrRh(DBPh2)2(H2O) in non coordinating solvent may be ascribed to the concomitant effect of the weak metal-water bond in the monomeric aqua complex, the strong tendency of Rh to achieving hexacoordination in such organo derivatives, and the ease of losing a BPh2 bridge of the diphenylborylated organorhodoximes.
Keywords
organorhodoximes; organocobaloximes; borylated; aqua-derivatives; dinuclear; synthesis; structure
Hrčak ID:
132159
URI
Publication date:
1.9.1999.
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