Preparation and structural characterization of [RuCl2(CO)2{Te(CH2SiMe3)2}2] and [RuCl2(CO){Te(CH2SiMe3)2}3]
摘要:
The objective of the present work was to synthesize mononuclear ruthenium complex [RuCl2(CO)(2){Te(CH2SiMe3)(2)}(2)] (1) by the reaction of Te(CH2SiMe3)(2) and [RuCl2(CO)(3)](2). However, the stoichiometric reaction affords a mixture of 1 and [RuCl2(CO){Te(CH2SiMe3)(2))(3)] (2). The X-ray structures show the formation of the cis(CI), cis(C), trans(Te) isomer of I and the cis(CI), mer(Te) isomer of 2. The Te-125 NMR spectra of the complexes are reported. The complex distribution depends on the initial molar ratio of the reactants. With an excess of [RuCl2(CO)(3)](2) only I is formed. In addition to the stoichiometric reaction, a mixture of I and 2 is observed even when using an excess of Te(CH2SiMe3)(2-) Complex 1 is, however, always the main product. In these cases the Te-125 NMR spectra of the reaction solution also indicates the presence of unreacted ligand. (C) 2007 Elsevier B.V. All rights reserved.