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Effect of peripheral donor substituents on the binding modes of phosphinomethanide ligands. Synthesis and crystal structures of alkali metal derivatives of an O-functionalised phosphinomethanide ligand

Lookup NU author(s): Dr Keith Izod, Jonathan Young, Professor William Clegg, Dr Ross Harrington

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Abstract

The O-functionalised tertiary phosphine {(Me3Si) 2CH}P(C6H4-2-CH2OMe)2 (9) is accessible via the reaction of {(Me3Si)2CH}PCl 2 with two equivalents of in situ generated 2-LiC6H 4CH2OMe. Phosphine 9 is readily deprotonated by Bu nLi to give the lithium phosphinomethanide [[{(Me3Si) 2C}P(C6H4-2-CH2OMe)2]Li] (13), which undergoes metathesis reactions with the alkoxides MOR [M = Na, K, R = But; M = Rb, R = 2-ethylhexyl] to give the heavier alkali metal phosphinomethanides [[{(Me3Si)2C}P(C6H 4-2-CH2OMe)2]M]n in good yields [M = Na (14), n = 2; M = K (15), Rb (16), n = ∞]. Compounds 9, [{(Me 3Si)2CH}P(C6H4-2-CH 2OMe)2LiBr]2 (10), and 14-16 have been studied by X-ray crystallography; in the solid state 14 adopts a dimeric structure, whereas 15 and 16 crystallise as one-dimensional polymers. © The Royal Society of Chemistry 2005.

Publication metadata

Author(s): Izod K, Young J, Clegg W, Harrington RW

Publication type: Article

Publication status: Published

Journal: Dalton Transactions

Year: 2005

Issue: 9

Pages: 1658-1663

Date deposited: 09/07/2010

ISSN (print): 1477-9226

ISSN (electronic): 1477-9234

Publisher: Royal Society of Chemistry

URL: http://dx.doi.org/10.1039/b502416a

DOI: 10.1039/b502416a

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