Komplexone XXIX. Ein grosser Chelateffekt besonderer Art

摘要: Complexing agents of the type: (HOOCCH2)(2=N(CH2))n N = (CH2COOH)2 with n-values from 2–8 have been investigated. The stability constants 1:1 complexes Ca2+, Cd2+ and Hg2+ determined for nearly whole series these complexons a few values obtained also Mg2+, Sr2+, Ba2+ Go2+. There is generally strong decrease in complex when n increased 2 t o 4, where an almost constant value reached which does not alter anymore to appreciable extent hy further increase chain length 11. mercury behave exceptionally. Replacement one or two CH2-groups connecting nitrogens by O, S, N(CH2) increases great if new 5-membered chelate rings can be formed coordination this heteroatom.