Synthesis and thermodynamic properties of novel tripod ligands and their cobalt(II), nickel(II), copper(II) and zinc(II) complexes

Three novel compounds, based on the 1,3,5-benzene core with C^sub 3^-symmetry, have been prepared and characterized by elemental analysis, i.r. and ^sup 1^H-n.m.r. Thermodynamic properties of the ligands and their Co^sup II^, Ni^sup II^, Cu^sup II^, and Zn^sup II^ metal complexes have been investiga...

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Bibliographic Details
Published in:Transition metal chemistry (Weinheim) 2002-05, Vol.27 (4), p.384
Main Authors: Lin, Hua-kuan, Wang, Xu, Su, Xun-cheng, Zhu, Shou-rong, Chen, Yun-ti
Format: Article
Language:English
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Summary:Three novel compounds, based on the 1,3,5-benzene core with C^sub 3^-symmetry, have been prepared and characterized by elemental analysis, i.r. and ^sup 1^H-n.m.r. Thermodynamic properties of the ligands and their Co^sup II^, Ni^sup II^, Cu^sup II^, and Zn^sup II^ metal complexes have been investigated and the corresponding stability constants obtained at 25.0 ± 0.1 °C and with I = 0.1 mol dm^sup -3^ in KNO^sub 3^ by potentiometric titration. A linear free energy relationship exists between the stability constants of complexes and the protonation constants of ligands in the ternary system of the Cu^sup II^-5-substituted phenanthroline-tripod ligand complexes.[PUBLICATION ABSTRACT]
ISSN:0340-4285
1572-901X
DOI:10.1023/A:1015051002413