1 Proton acids, Lewis acids, hard acids, soft acids and superacids.- 2 Gas-phase proton-transfer equilibria.- 3 Proton-transfer and the solvation of ammonium ions.- 4 Participation of hydroxylic solvent molecules.- 5 Hydrogen bonding and proton-transfer reactions in non-aqueous solvents.- 6 Fast and slow proton-transfer reactions in solution.- 7 The Brønsted relation; significance of the exponent.- 8 Substrate isotope effects.- 9 Solvent isotope effects.- 10 Tunnelling in hydrogen transfer reactions.- 11 Neighbouring group participation.- 12 Proton-transfer in enzymatic catalysis.- 13 Heterogeneous proton-transfer reactions.
