Diastereoisomeric organophosphorus compounds. Part 4. Proton and phosphorus-31 nuclear magnetic resonance spectra of compounds of the type [RR′P(X)]2Y and RR′P(X)–Y–(Z)PRR′(R = CH3, R′= t-C4H9)

Abstract

When R and R′ are simple alkyl groups, compounds of the type [RR′P(X)]₂Y give rise to[AR_tX_n]₂ spectra (assuming X and Y are non-magnetic). Explicit expressions for resonance frequencies and intensities of A (³¹P) and R and X (¹H) are derived. Data are given for rac-[RR′P]₂, meso-[RR′P(S)]₂, rac-[RR′P(S)]₂, meso-[RR′P(S)]₂O, and rac-[RR′P(S)]₂S. The results are discussed and compared to those for asymmetric compounds of the type RR′P(S)–PRR′ and RR′P(S)–S–PRR′.