Correlated proton affinities of arylphosphines

Theoretical gas phase proton affinities are presented at the MP2 level for phenylphosphine, dimethylphenylphosphine and the bicyclic phosphines phenylphosphabicyclo(3,3,1) nonane and 1H,5H-benzo(ij)-5-phosphadecalin. The latter two species have proton affinities larger than triphenylphosphine.