1732 Russian Chemical Bulletin, Vol. 47, ,.Vo. 9, September, 199S ... BK Shcherbakov,* FI Bel'skii, A. Yu. Gukasova, Yu. M. Polikarpov, and M. L KabachniM ... AN Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, 28 ul. Vavilova, 117813 Moscow, Russian Federation. Fax." + 7 (095) I35 5085 ... Key words: aminoatkylidenediphosphonic acids, synthesis; zwinerion; dissociation con- stant, suability constant.