摘要:
The ratio (k(exp) + k(isc))/k(PYR) was determined as a function of temperature for the singlet nitrenes derived from pentafluoro, 2,6-difluoro, and 2,4,6-trifluorophenyl azide where k(PYR), k(exp), and k(isc) are the absolute rate constants of reaction of the nitrene with pyridine, ring expansion, and intersystem crossing, respectively. Activation parameters were deduced for the three singlet nitrene processes.