Hägele G. Protolysis and Complex Formation of Organophosphorus Compounds-Characterization by NMR-Controlled Titrations.
Molecules 2019;
24:molecules24183238. [PMID:
31492010 PMCID:
PMC6766815 DOI:
10.3390/molecules24183238]
[Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2019] [Revised: 08/26/2019] [Accepted: 09/02/2019] [Indexed: 11/16/2022] Open
Abstract
Phosphonic acids, aminophosphonic acids, and phosphonocarboxylic acids are characterized by an advanced hyphenated technique, combining potentiometric titration with NMR spectroscopy. Automated measurements involving 13C, 19F and 31P nuclei lead to “pseudo 2D NMR” spectra, where chemical shifts or coupling constants are correlated with analytical parameters. Dissociation constants, stability constants, dynamic and specific chemical shifts are determined. Macroscopic and microscopic dissociation equilibria are discussed.
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