31P chemical shifts and31P—−13C coupling effects in the stereochemical analysis of benzo-7-phosphanorbornene derivatives
作者:Louis D. Quin、F. Christian Bernhardt
DOI:10.1002/mrc.1260231110
日期:1985.11
The first phosphines based on the benzo‐7‐phosphanorbornene system have been prepared and found to have extremely deshielded 31P nuclei. The phosphine with a P‐tert‐butyl group gives the most downfield value (δ +152.5) ever recorded for a tertiary phosphine. The lone‐pair orientation in phosphines controls the magnitude of 2J (PC) and 3J (PC), and these effects were used to determine stereochemical