Vibrational, P-31 NMR and crystallographic studies of diiodine adducts of some bidentate tertiary phosphine sulfides
Apperley, David C., Bricklebank, Neil, Hursthouse, Michael B., Light, Mark E. and Coles, Simon J. (2001) Vibrational, P-31 NMR and crystallographic studies of diiodine adducts of some bidentate tertiary phosphine sulfides. Polyhedron, 20, (15-16), 1907-1913. (doi:10.1016/S0277-5387(01)00773-2).
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Treatment of bis(dipbenylphosphino)methane disulfide (dppmS) or bis(diphenylphosphino)ethane disulfide (dppeS) with diiodine in dichloromethane yields the adducts dppmS .I-4 1 and dppeS .I-4 2, respectively, whose structures have been solved by X-ray crystallography. Compounds 1 and 2 consist of discrete molecular units containing bent P-S-I and linear S . . .I-I geometries that can be interpreted in terms of donation of electron density from sulfur to diiodine. Consistent with this interpretation, the P-S bonds are lengthened compared to the unco-ordinated phosphine sulfides, and the I-I bonds are lengthened compared to unco-ordinated diiodine. Both compounds can therefore be described as 'charge-transfer' complexes. The two S . . .I-I moieties in 1 are inequivalent having markedly different bond lengths and angles. In 2 both S . . .I-I moieties are identical. The structural features of 1 and 2 are in accordance with Raman and P-31 CP MAS NMR data.
|Keywords:||tertiary phosphine sulfide, bis(diphenylphosphino)methane disulfide, bis(diphenylphosphino)ethane disulfide, diiodine, charge-transfer complexes|
|Subjects:||Q Science > QD Chemistry|
|Divisions:||University Structure - Pre August 2011 > School of Chemistry
|Date Deposited:||21 Jun 2006|
|Last Modified:||01 Jun 2011 04:27|
|Contributors:||Apperley, David C. (Author)
Bricklebank, Neil (Author)
Hursthouse, Michael B. (Author)
Light, Mark E. (Author)
Coles, Simon J. (Author)
|Contact Email Address:||firstname.lastname@example.org|
|RDF:||RDF+N-Triples, RDF+N3, RDF+XML, Browse.|
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