Theoretical gas phase proton affinities are presented at the MP2 level
for phenylphosphine, dimethylphenylphosphine and the bicyclic phosphi
nes phenylphosphabicyclo(3,3,I)nonane and 1H,5H-benzo(ii)-5-phosphadec
alin, The latter two species have proton affinities larger than triphe
nylphosphine.