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A new series of iodocarbonyl ruthenium(II) complexes with unsymmetrical phosphine-phosphine sulfide ligands of the type Ph2P(CH2)nP(S)Ph2, n = 1-4: Isolation and structural investigation

A new series of iodocarbonyl ruthenium(II) complexes with unsymmetrical phosphine-phosphine sulfide ligands of the type Ph2P(CH2)nP(S)Ph2, n = 1-4: Isolation and structural investigation. Dutta, Dipak Kumar; Chutia, Pratap; Woollins, J. Derek; Slawin, Alexandra M. Z. (Material Science Division, Regional Research Laboratory (CSIR), Jorhat, Assam 785006, India). Inorganica Chimica Acta, 359(3), 877-882 (English) 2006 Elsevier B.V. CODEN: ICHAA3. ISSN: 0020-1693. DOCUMENT TYPE: Journal CA Section: 78 (Inorganic Chemicals and Reactions) Section cross-reference(s): 75 Hexacoordinated chelate complex cis-[Ru(CO)2I2(P?S)] (1a) {P?S = h2-(P,S)-coordinated} and pentacoordinated nonchelate complexes cis-[Ru(CO)2I2(P~S)] (1b-d) {P~S = h1-(P)-coordinated} are produced by the reaction of polymeric [Ru(CO)2I2]n with equimolar quantity of the ligands Ph2P(CH2)nP(S)Ph2 {n = 1(a), 2(b), 3(c), 4(d)} in CH2Cl2 at room temp. The bidentate nature of the ligand a in the complex 1a gives a five-membered chelate ring which confers extra stability to the complex. However, 1:2 (Ru:L) molar ratio reaction affords the hexacoordinated nonchelate complexes cis,cis,trans-[Ru(CO)2I2(P~S)2] (2a-d) irresp. of the ligands. All the complexes show two equally intense terminal n(CO) bands in the range 2028-2103 cm-1. The n(PS) band of complex 1a occurs 23 cm-1 lower region compared to the corresponding free ligand suggesting chelation via metal-S bond formation. X-ray crystallog. of 1a reveals that the Ru(II) atom occupies the center of a slightly distorted octahedral geometry. The complexes also were characterized by elemental anal. 54006-28-9 is just another one chemical used in this study., 1H, 13C and 31P NMR spectroscopy. .