G. Etemadmoghadam et al., DIPHOSPHIRANES - NEW PRECURSORS OF SIGMA-DIPHOSPHAALLYL OR PI-DIPHOSPHAALLYL COMPLEXES, Phosphorus, sulfur and silicon and the related elements, 76(1-4), 1993, pp. 301-304
The metalation reactions of the functionalized diphosphiranes 1a-b wit
h the anionic metal transition complexes (M = Mo, W, Co) afford the si
gma- or pi- diphosphaallyl complexes (2 or 3, respectively) as functio
n of the intracyclic carbon atom substituents. The thermal lability of
these complexes is detected by variable-temperature NMR spectroscopy.