Organo-functionalised arsine and stibine organometallics; syntheses and structural characterisations of 1,3- (PhC C)(2)Sb (2)(CH2)(3), As(C CPh)(3), R2AsCH2AsR2 R = Me3SiC C-, (Me3Si)(2)N- and 2-SPy with pi-stacking in the latter

Paver, M.A., Joy, J.S., Coles, S.J., Hursthouse, M.B. and Davies, J.E. (2003) Organo-functionalised arsine and stibine organometallics; syntheses and structural characterisations of 1,3- (PhC C)(2)Sb (2)(CH2)(3), As(C CPh)(3), R2AsCH2AsR2 R = Me3SiC C-, (Me3Si)(2)N- and 2-SPy with pi-stacking in the latter. Polyhedron, 22 (1), 211-216. (doi:10.1016/S0277-5387(02)01339-6).

Abstract

A series of dinuclear organo-functionalised stibine and arsine ligands incorporating a range of hard, soft and pi-donor moieties have been synthesised from the reactions of Cl2Sb(CH2)(3)SbCl2 and Cl2AsCH2AsCl2 with a range of organolithium reagents. The X-ray structures of 1,3-[(PhCdropC)(2)Sb](2)(CH2)(3) (1), As(CdropCPh)(3) (2), R2AsCH2AsR2 [R = Me(3)SiCdropC, 3; (Me3Si)(2)N, 4; and 2-SPy 5] have been determined. Compound 5 associates into pseudo dimers as a result of intermolecular pi-pi stacking between the pyridyl groups on one end of two separate diarsine molecules. Whereas the bridging unit remains intact during the syntheses of 1 and 3-5, the formation of the mononuclear trisacetylide species 2, involves the unexplained cleavage of the bridging methylene unit.

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Contributors

Author: S.J. Coles

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