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Дата последнего поиска статьи во внешних источниках: 28 июля 2014 г.
Аннотация:Resorcinolbased ruthenium bis(phosphinite) complexes were synthesized. Complexes RuCl(CO)[2,6-(But2PO)2C6H3] (9) and RuH(CO)[2,6-(But2PO)2C6H3] (10) were obtained by cyclometallation of 1,3(But2PO)2C6H3 with RuCl2(DMSO)4 in 2-methoxyethanol in the presence of Hünig´s base. The interconversion of complexes 9 and 10 was studied. The addition of carbon monoxide to complexes 9 and 10 yielded 18e adducts, RuCl(CO)2[2,6-(But2PO)2C6H3] (11) and RuH(CO)2[2,6-(But2PO)2C6H3] (12), respectively. In the case of complex 9, this reaction is reversible. Reaction of complex 10 with trifluoroacetic acid resulted in complex Ru(CF3COO)(CO)[2,6-(But2PO)2C6H3] (13), which reacted with carbon monoxide to give complex Ru(CF3COO)(CO)2[2,6-(But2PO)2C6H3] (14). Based on the IR spectral data, the TFA ligand in complexes 13 and 14 is bound in a bi and monodentate fashion, respectively. The structure of compound 9 was determined by Xray diffraction analysis.
Key words: ruthenium, pincer complexes, bis(phosphinite) ligands, carbonyls, hydrides, Xray diffraction analysis.