Title of article
Two novel macrocyclic monooxo-tetraamines and the stabilities of their Cu(II) complexes
Author/Authors
Dian Chen، نويسنده , , Yizhen Sun، نويسنده , , Arthur E. Martell، نويسنده , , Michael J. Welch ، نويسنده ,
Issue Information
روزنامه با شماره پیاپی سال 2002
Pages
6
From page
119
To page
124
Abstract
The synthesis and characterization of two novel macrocyclic monooxo-tetraamines: 1,4,8,11-tetraazacyclotetradecane-3-one (1) and 1,4,7,10-tetraazacyclododecane-2-one (2) are described. Equilibrium constants for their Cu(II) complexes were determined by direct potentiometry. The formation constants (KMH−1L=[MH−1L]/[M][L][H−1]) of Cu(II)−1 in 0.100 M KCl at 25.0 °C is 1013.26; that for the 2 isomer is 103.35. The pM values of ligands 1 and 2 are 17.9 and 8.5, respectively. The results are compared with three monooxo-macrocyclic tetraamines (3, 4, 5) and some dioxomacrocyclic tetraamines.
Keywords
Stability constants , Cu(II) complexes , Synthesis , Macrocyclic polyamines
Journal title
INORGANICA CHIMICA ACTA
Serial Year
2002
Journal title
INORGANICA CHIMICA ACTA
Record number
1321354
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