Synthesis of α,ω-bis(diphenylphosphino)alkane and α,ω-bis(diphenylphosphino)(poly)ether ligands and complexes of rhodium(I) |
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Authors: | D.Harry M.W. Thewissen Klaas Timmer Jan G. Noltes Jan W. Marsman Richard M. Laine |
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Affiliation: | Institute of Applied Chemistry T.N.O., P.O. Box 5009, 3502 JA Utrecht, The Netherlands;S.R.I. International, Physical Organic Chemistry Department, 333 Ravenswood Ave, Menlo Park, Calif. 94025, U.S.A. |
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Abstract: | α,ω-Bis(diphenylphosphino)alkane and α,ω-bis(diphenylphosphino)(poly)ether ligands can be prepared in very high yields via reaction of the appropriate dihalide with two equivalents of LiPPh2. For the [Rh(COD)()][ClO4] complexes of these ligands, the ligands with five or less atoms in the alkane or ether bridge form monomeric complexes via η2-coordination. In general the ligands with eight or more atoms in the bridge give di- or polynuclear species. In addition the long chain diphosphino-polyethers form – to a small extent – monomeric species by η2-coordination. |
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Keywords: | Authors to whom correspondence should be addressed. |
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