Synthesis and acid–base properties of (1H-benzimidazol-2-yl-methyl)phosphonate (Bimp<sup>2−</sup>). Evidence for intramolecular hydrogen-bond formation in aqueous solution between (N-1)H and the phosphonate group
作者:María José Sánchez-Moreno、Raquel B. Gómez-Coca、Alfonso Fernández-Botello、Justyn Ochocki、Andrzej Kotynski、Rolf Griesser、Helmut Sigel
DOI:10.1039/b301281f
日期:——
constants taken from the literature show that this latter pKa value is far too large and this allows the conclusion that an intramolecular hydrogen bond is formed between the (N-1/N-3)H site and the phosphonate group of Bimp2-; the formation degree of this hydrogen-bonded isomer is estimated to be 98 +/- 2%. The general relevance of this and the other results are shortly discussed and the species distribution