| 19019724 |
Deb B, Sarmah BJ, Borah BJ, Dutta DK: Synthesis, characterisation and thermal studies of ruthenium (II) carbonyl complexes of functionalised tripodal phosphine chalcogen donor ligands, [CH (3) C (CH (2) P (X) Ph (2))(3)], where X=Se, S, O. Spectrochim Acta A Mol Biomol Spectrosc. 2009 Mar;72(2):339-42. Epub 2008 Oct 14.
The polymeric ruthenium (II) carbonyl complex, [Ru (CO)(2) Cl (2)](n) reacts with 1,1,1-tris-(diphenylphosphinomethyl) ethane trichalcogenide ligands, [CH (3) C (CH (2) P (X) Ph (2))(3)], where X=Se (a), S (b) and O (c) in 1:1 (metal:ligand) molar ratio to afford hexa-coordinated complexes of the type eta (2)-(X,X)-[Ru (CO)(2) Cl (2) P (3) X (3)] (1a-c). The complexes 1a-c exhibit two equally intense nu (CO) bands in the range 1979-2060cm (-1) indicating cis-disposition of the two terminal carbonyl groups. The values of nu (CO) frequencies containing different ligands, in general, follow the order: P (3) O (3)> P (3) S (3)> P (3) Se (3) which may be explained in terms of 'Soft-Hard' (Ru (II)-O) and 'Soft-Soft' (Ru (II)-S/Se) interactions. The complexes have been characterized by elemental analyses, mass, (1) H, (31) P, (77) Se and (13) C NMR spectroscopy. The thermal stability of the complexes has also been studied. |
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