Low-Coordinate Tin and Lead Cations

Taylor, Morgan J, Saunders, Amy J, Coles, Martyn P and Fulton, J Robin (2011) Low-Coordinate Tin and Lead Cations. Organometallics, 30 (6). pp. 1334-1339. ISSN 0276-7333

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A series of low-coordinate tin and lead cationic complexes have been synthesized using the bulky ß-diketiminate ligand [{N(2,6- iPr2C6H3)C(Me)}2CH] - (BDI) to stabilize the metal center. Two different routes to [(BDI)Sn]+[X]- and [(BDI)Pb]+[X]- were explored (X = B(C6F5)4, AlCl4, MeB(C6F5)3): abstraction of the chloride with a Lewis acid from (BDI)SnCl and (BDI)PbCl and abstraction of a methyl group with a borane from (BDI)SnMe and (BDI)PbMe. The crystal structures of the tin and lead cations were determined; in both, solvent molecules were found to coordinate to the metal center. In the case of [(BDI)Pb]+[B(C 6F5)4]-, a dichloromethane molecule was found. Density functional theory (DFT) calculations showed that this could be due to crystal packing. In the case of [(BDI)Sn]+[MeB(C 6F5)3]-, an ether molecule was coordinated to the tin metal center. DFT calculations revealed a significant energy gain for the coordinated ether as opposed to the free molecules.

Item Type: Article
Schools and Departments: School of Life Sciences > Chemistry
Depositing User: Morgan Taylor
Date Deposited: 06 Feb 2012 18:34
Last Modified: 19 Mar 2012 11:12
URI: http://sro.sussex.ac.uk/id/eprint/17231
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