Carbon-13 nuclear magnetic and chlorine-35 nuclear quadrupole resonance spectra of chloro(trifluoromethyl)phosphines and chloro(trifluoromethyl)phosphine oxides

Abstract

The ³⁵Cl n.q.r. and ¹³C n.m.r. spectra of the series of compounds P(CF₃)_nCl_{3 –n} and P(CF₃)_nCl_{3 –n}O with O < n < 3 have been recorded. The results show that both the ³⁵Cl n.q.r. frequencies and the ¹J(CP) coupling constants are very sensitive to substitution on the phosphorus atom. The trends in these parameters are discussed; they are consistent with a high electronegativity for the CF₃ group.