IUPAC/Dissociation-Constants: v2.3e

This release includes the labeled data, digitization report, method keys, and partial reference keys as part of the IUPAC Digitized pKa Dataset. For more information, please review the Data Digitization Report attached in this repository. Our validation process is ongoing and will continue; please be advised that a few errors and inconsistencies may still exist.

The digitized books in this collection include:

• Serjeant: International Union of Pure and Applied Chemistry, E. P Serjeant and Boyd Dempsey. Ionisation Constants of Organic Acids in Aqueous Solution; Oxford/Pergamon, 1979 (Oxford IUPAC chemical data series)
• Perrin: International Union of Pure and Applied Chemistry, DD Perrin. Dissociation Constants of Organic Bases in Aqueous Solution; Butterworths, 1965
• Perrin Supplement: International Union of Pure and Applied Chemistry, DD Perrin. Dissociation Constants of Organic Bases in Aqueous Solution, Supplement; Butterworths, 1972

Fixed in this version:

• perrin1948 - pKa2 to pKa1, pKa3 to pKa2
• perrin1968 - pKa2 to pKa1, pKa3 to pKa2
• perrin_supp7759, perrin_supp7764 - to pKaH1, pKa1, pKa2
• serjeant2404 - pKa3 to pKa2
• serjeant2824 - pKa2 to pKa1
• serjeant4860 - pKa3 to pKa1
• serjeant4873: pKa2 to pKa1, pKa3 to pKa2
• serjeant4946 - pKa2 to pKa1, pKa3 to pKa2
• serjeant5079 - pKa2 to pKa1
• serjeant5999 - now reordered to pKa1, ... pKa4, comporting with acidity trends of EDTA
• serjeant6019 - as above
• serjeant6022 - as above
• serjeant5690 - as above
• serjeant5691 - as above
• serjeant5693 - as above; pKa1 ... pKa6
• serjeant5693 - as above
• serjeant4033 - removed incorrect Remarks text
• perrin_supp4942-4945 - made pKaH1 and pKaH(carbonium) consistent (thanks to @Shorku in #7)
• perrin_supp7760, 7761 - to pKa2

Other changes:

• Updated README to point to the RSC Advances manuscript.
• Updated contact information and bumped year to 2026.