Journal
DALTON TRANSACTIONS
Volume -, Issue 14, Pages 1377-1382Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/b617257a
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A series of racemic and optically pure aminoalkylferrocenyldichlorophosphanes has been prepared by reaction of phosphorus trichloride with the corresponding lithiated aminoalkylferrocene precursors. Crystal structures of racemic 1-dichlorophosphanyl-2-N,N-dimethylaminomethylferrocene, racemic 1-dichlorophosphanyl-2-N,N-dimethylaminomethyl-3-triphenylsilylferrocene and (S)-N,N-dimethyl1-[(R)-2-(dichlorophosphanyl) ferrocenyl] ethylamine reveal short intramolecular N (. . .) P distances, which are suggestive of weak N -> P dative bonds. The aminoalkylferrocenyldichlorophosphanes can be used for the preparation of the corresponding primary phosphanes, one of which was characterised by X-ray crystallography. Optically pure (R)-N, N-dimethyl-1-[(S)-2-(phosphanyl)ferrocenyl] ethylamine can easily be lithiated twice to give the first enantiomerically pure lithium-phosphorus closo cluster compound, which was also structurally characterised.
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