PREPARATION OF [4-T-BUTYL-2,6-BIS(N,N-DIMETHYLAMINOMETHYL)PHENYL]-THIOXOPHOSPHINE SULFIDE WITH INTRAMOLECULAR PARTICIPATION OF NITROGEN LONE-PAIR IN STABILIZATION

The 4-t-butyl-2,6-bis(N,N-dimethylaminomethyl)phenyl group was utilized to prepare [4-t-butyl-2.6-bis(N,N-dimethylaminomethyl)phenyl]thioxophosphine sulfide. A P-31 NMR chemical shift of the thioxophosphine sulfide shows a high field shift by 153 ppm compared with that of (2,4,6-tri-t-butylphenyl)thioxophosphine sulfide, suggesting a strong intramolecular participation with the lone-pair electrons of the nitrogen atom in stabilization of the -P(=S)2 group.