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. 2013 May 6;2(3):106–114. doi: 10.1002/open.201300009

Table 4.

Ligand orbital energies ε [eV] and proton affinities [kcal mol−1][a]

ε(LP) ε(π*) PA
NH3 −6.05 +1.42 +201.4
PH3 −6.63 −0.24 +185.2
CO −8.93 −1.92 +141.5

[a] Computed at ZORA-BLYP/TZ2P. LP: lone pair, π*: acceptor orbital. Proton affinities (PA) from enthalpies at 298.15 K and 1 atm.