2-phosphaallyl anion

Through a rather complicated sequence of meanwhile fully understood reaction steps ethyl benzoate and lithium bis(trimethylsilyl)phosphanide form tris(l,2-dimethoxyethane-0,0 )-lithium 3-phenyl-l,3-bis(trimethylsilyl)-l,2-diphosphapropenide and 3,5-diphenyl-l,2-bis(tri-methylsilyl)-l,2,4-triphospholide. X-ray structure determinations on orange or green, metallically lustrous, crystals show the compoxmds to be ionic in the solid and to contain a 1,2-diphosphaallyl and a 2-phosphaallyl anion, respectively. Dark red tetrakis(tetra-... 

A 2-phosphaallyl anion as part of a five membered heterocycle [27, 35] When in the already discussed reaction between ethyl benzoate and lithium bis(trimethylsilyl)phosphanide the molar ratio of the educts is changed finally from 1 3 to 1 1, dark green, metallically lustrous, air sensitive crystals of... 

Phosphaallyl anions are also being studied in the research groups of, e.g., Niecke [33] and Denis [34]. 

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