A LINEAR CORRELATION BETWEEN THE P-31 NMR SHIFTS OF CYCLIC PHOSPHINES AND THE 0–17 SHIFTS OF THE CORRESPONDING PHOSPHINE OXIDES

Abstract

The O-17 NMR shifts for phosphine oxides based on six different heterocyclic ring systems, representing 16 data points, were plotted against the P-31 shifts of the corresponding phosphines. A linear correlation with R = 0.96 resulted. Each heterocyclic system occupied its own region of the correlation line, with no overlap. There was no correlation between the O-17 NMR shifts and the P-31 shifts of the phosphine oxides.

Key Words:

• Phosphorus NMR
• oxygen NMR
• phosphine oxides
• phosphines
• aminophosphines