Phosphorus, Sulfur and Silicon and the Related Elements p. 2337 - 2350 (2007)
Update date:2022-08-17
Topics:
Bogdn
Pczely
Haegele
The stability constants of the complexes of one oligophosphonic acid (ethane-1,1,2-triphosphonic acid 1), five phosphonocarboxylic acids (ethane-1,2-diphospho-no-1-carboxylic acid 2, propane-1,1-diphosphono-2,3- dicarboxylic acid 3, ethane-1,2-diphosphono-1,2-dicarboxylic acid 4, ethane-1-phosphono-1,2-dicarboxylic acid 5, and propane-1-phosphono-1,2,3- tricarboxylic acid 6), and ethane-1,1,2-tricarboxylic acid 7 with Cu2 +, Ni2 +, Zn2 +, Cd2 + and Ca2 + were determined by pH-metric titrations. The six ligands of type HNL (N = 4 - 6) form mononuclear MLHn (n = 0, 1, , N-1) complexes with chelate structure. The calcium complexes seem to be less stable than the transition metal complexes.
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