M. Yoshifuji et al., A STABILIZED PHOSPHINOTHIOYLIDENE GENERATED BY DESELENATION OF A SELENOXOTHIOXOPHOSPHORANE, Chemistry Letters, (10), 1993, pp. 1715-1718
o(2,4-di-t-butyl-6-dimethylaminophenyl)phosphorane was prepared and wa
s deselenated with tris(dimethylamino)phosphine to give the correspond
ing phosphinothioylidene (thioxophosphine, thionophosphine, or phosphi
nidene sulfide), for the first time, as a thermally stable compound, w
hich is considered to be stabilized with the lone pair electrons of th
e o-dimethylamino group.