Rhodium(I) complexes of α-keto-stabilised 1,2-bis(diphenylphosphino)alkane mono ylides

Saravanabharathi, D. ; Venkatakrishnan, T. S. ; Nethaji, M. ; Krishnamurthy, Setharampattu S. (2003) Rhodium(I) complexes of α-keto-stabilised 1,2-bis(diphenylphosphino)alkane mono ylides Proceedings of the Indian Academy of Sciences - Chemical Sciences, 115 (5-6). pp. 741-749. ISSN 0253-4134

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Official URL: http://www.ias.ac.in/chemsci/Pdf-OctDec2003/Pc3361...

Related URL: http://dx.doi.org/10.1007/BF02708264

Abstract

Rhodium(I) complexes of the hybrid ylide-phosphine ligands, Ph2P(CH2) n PPh2(CHC(O)C6H5) (n = 1: dppm-yl, or 2: dppe-yl) have been synthesised from [Rh(μ-C1)(COD)]2 (COD = 1,5-cyclooctadiene) and characterized by NMR spectroscopic and X-ray structural methods. The dppe-yl behaves as an ambidentate ligand; it functions as a monodentate P-donor ligand with a dangling ylidic carbon in the neutral chloro complex, [(COD)Rh(Cl)(dppe-yl)] (1), whereas replacement of the chloride by a non-coordinating counter anion results in the formation of the complexes, [(COD)Rh(L-L')]+ (L-L' = dppe-yl (2) or dppm-yl (3)) respectively in which the ligands are bonded to the metal via the phosphorus and the ylidic carbon atoms. The 1,5-cyclooctadiene (COD), present in the Rh(I) precursor, remains intact in the products. The structures of 1,2 and3 have been confirmed by X-ray crystallography.

Item Type:Article
Source:Copyright of this article belongs to Indian Academy of Sciences.
Keywords:Rh(I) Complexes; Ylide-phosphine; Ambidentate Coordination; Crystal Structure; NMR
ID Code:17860
Deposited On:16 Nov 2010 12:35
Last Modified:17 May 2016 02:31

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