Several competing fragmentation reactions, initiating directly
from the molecular ion, which are common to p- and m- substituted
N,N-dimethyl-N\u27- phenyl-formamidine, were examined. IP, AP and
daughter/parent ion ratio measurements were made to provide some
insight into the substituent effects on reaction mechanisms. The
results obtained were compared with those found for the compounds
N,N-dimethyl-N\u27-pyridyl-4-formamidine and isomeric 3-formamidine.
The substituent constant o/ for the nitrogen in the pyridine
ring was determined
