Cyclic organophosphorus compounds. XVIII—the mass spectroscopy of some 2‐amino‐1,3,2‐dioxaphosphorinans, cyclic phosphorodiamidates and phosphorodiamidothionates

Abstract

AbstractStepwise replacement of O in 1,3‐dioxa‐2‐phospha(V)‐cyclohexanes (or related ring systems) by NR (R=H or Me) leads to an increase in the stability of the hetero‐ring ions produced under electron impact conditions. In the case of the 2‐phenoxy derivatives, there is also an increased abundance of [MPhO]+ or [MPhOH]+ ions, and, for the 2‐sulphides, a reduction in the abundance of [M‐S]+˙ and [M‐SH]+ ions, with a concurrent increase in that of [M‐PhS]+ ions. Such trends have been correlated with ultraviolet photoelectron spectral data on a qualitative basis.