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Abstract
The crystal structure of cyanomethyltris-(2,4,6-trimethylphenyl)phosphonium tetraiodomercurate(II), [Mes3-PH2CN]2˙Hgl42–, is reported, and the bonding and conformational characteristics of the cation are compared with those related structures which also exist in a propeller conformation. The dynamic stereochemistry of Mes3PH2CN, Mes3PH3, and Mes3P, as studies by 1H n.m.r. spectroscopy, is described. The calculated ΔG‡values for enantiomerisation of the propeller configuration, assumed to occur via the two-ring flip mechanism, are discussed in the context of related studies. For Mes3PH2CN, the enantiomerisation mechanism is related to the conformation in the crystalline state.
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Schedule a callMore From: Journal of the Chemical Society, Perkin Transactions 2
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