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.
SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2009;
72:339-342. [PMID:
19019724 DOI:
10.1016/j.saa.2008.09.018]
[Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/10/2008] [Revised: 09/25/2008] [Accepted: 09/28/2008] [Indexed: 05/27/2023]
Abstract
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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