Structure of the uncharged, anionic, and cationic forms of aminoalkylcarboxylic and aminoalkylphosphonic complexones

This review is concerned with an analysis of the structure of aminocarboxylic and aminophosphonic acids from the data of X-ray diffraction studies. Monoamino and diamino (also triamino) complexones, the prototropic tautomerism of complexones, and the structural characteristics of their hydrohalides are examined successively. 51 references.