Proton affinity (data page)
Proton affinities are quoted in kJ/mol, in increasing order of gas-phase basicity of the base.
Base |
Proton affinity |
|---|---|
Neutral molecules |
|
Helium |
178 |
Neon |
201 |
Argon |
371 |
Dioxygen |
422 |
Dihydrogen |
424 |
Krypton |
425 |
Hydrogen fluoride |
490 |
Dinitrogen |
495 |
Xenon |
496 |
Nitric oxide |
531 |
Carbon dioxide |
548 |
Methane |
552 |
Hydrogen chloride |
564 |
Hydrogen bromide |
569 |
Nitrous oxide |
571 |
Carbon monoxide |
594 |
Ethane |
601 |
Nitrogen trifluoride |
602 |
Hydrogen iodide |
628 |
Carbonyl sulfide |
632 |
Acetylene |
641 |
Arsenic trifluoride |
649 |
Silane |
649 |
Sulfur dioxide |
676 |
Hydrogen peroxide |
678 |
Ethylene |
680 |
Phosphorus trifluoride |
697 |
Water |
697 |
Carbon disulfide |
699 |
Phosphoryl trifluoride |
702 |
2,4-Dicarba-closo-heptaborane(7) |
703 |
Hydrogen sulfide |
712 |
Hydrogen selenide |
717 |
Hydrogen cyanide |
717 |
Formaldehyde |
718 |
Carbon monosulfide |
732 |
Cyanogen chloride |
735 |
Arsine |
750 |
Benzene |
759 |
Methanol |
761 |
Methanethiol |
784 |
Ethanol |
788 |
Acetonitrile |
788 |
Phosphine |
789 |
Nitrogen trichloride |
791 |
Ethanethiol |
798 |
Propanol |
798 |
Propane-1-thiol |
802 |
Hydroxylamine |
803 |
Dimethyl ether |
804 |
Glyceryl phosphite |
812 |
Borazine |
812 |
Acetone |
823 |
Diethyl ether |
838 |
Dimethyl sulfide |
839 |
Iron pentacarbonyl |
845 |
Ammonia |
854 |
Methylphosphine |
854 |
Hydrazine |
856 |
Diethyl sulfide |
858 |
1,6-Dicarba-closo-hexaborane(6) |
866 |
Aniline |
877 |
P(OCH2)3CCH3 |
877 |
Ferrocene |
877 |
Dimethyl sulfoxide |
884 |
Dimethyl formamide |
884 |
Trimethyl phosphate |
887 |
Trimethylarsine |
893 |
Methylamine |
896 |
Tri-O-methyl thiophosphate |
897 |
Dimethylphosphine |
905 |
Trimethyl phosphite |
923 |
Dimethylamine |
923 |
Pyridine |
924 |
Trimethylamine |
942 |
Trimethylphosphine |
950 |
Triethylphosphine |
969 |
Triethylamine |
972 |
Lithium hydroxide |
1008 |
Sodium hydroxide |
1038 |
Potassium hydroxide |
1100 |
Caesium hydroxide |
1125 |
Anions |
|
Trioxophosphate(1â) |
1301 |
Iodide |
1315 |
Pentacarbonylmanganate(1â) |
1326 |
Trifluoroacetate |
1350 |
Bromide |
1354 |
Nitrate |
1358 |
Pentacarbonylrhenate(1â) |
1389 |
Chloride |
1395 |
Nitrite |
1415 |
Hydroselenide |
1417 |
Formate |
1444 |
Acetate |
1458 |
Phenoxide |
1470 |
Cyanide |
1477 |
Hydrosulfide |
1477 |
Cyclopentadienide |
1490 |
Ethanethiolate |
1495 |
Nitromethanide |
1501 |
Arsinide |
1502 |
Methanethiolate |
1502 |
Germanide |
1509 |
Trichloromethanide |
1515 |
Formylmethanide |
1533 |
Methylsulfonylmethanide |
1534 |
Anilide |
1536 |
Acetonide |
1543 |
Phosphinide |
1550 |
Silanide |
1554 |
Fluoride |
1554 |
Cyanomethanide |
1557 |
Propoxide |
1568 |
Acetylide |
1571 |
Trifluoromethanide |
1572 |
Ethoxide |
1574 |
Phenylmethanide |
1586 |
Methoxide |
1587 |
Hydroxide |
1635 |
Amide |
1672 |
Hydride |
1675 |
Methanide |
1743 |
Source: Jolly, William L. (1991). Modern Inorganic Chemistry (2nd Edn.). New York: McGraw-Hill. ISBN 0-07-112651-1.