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

https://hrcak.srce.hr/132159

Publication date:

1.9.1999.

Visits: 1.107 *