✦ LIBER ✦

pH-metric and spectrophotometric study of copper(II), nickel(II) and zinc(II) homo- and heterobinuclear complexes with diethylenetriamine and imidazole in aqueous medium

✍ Scribed by R.N. Patel; N. Singh; R.P. Shrivastava; Subodh Kumar; K.B. Pandeya

Publisher: Elsevier Science
Year: 2000
Tongue: English
Weight: 455 KB
Volume: 89
Category: Article
ISSN: 0167-7322
DOI: 10.1016/s0167-7322(00)90014-x

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✦ Synopsis

Homo-and heterobinuclear complexes of copper(II) nickel(II) and zinc(II) with diethylenetriamine and imidazole have been investigated using pH-metry in aqueous medium at 25±1 ° and 1 = 0.1 M NaCIO4 and EPR in frozen aquo-methanol (1:1) at 77 K. The experimental data have provided evidence for the following homo-and heterobinuclear species (A = diethylenetriamine and B = imidazole): M2(A)2(B) 4". M2(A)2(B-H) 5~, MIM2(A)2(B) 4+ and MIM;(A)2(B-H) 3+. Deprotonation of bridging ligand in homo-and heterobinuclear complexes takes place at pit>7.0.

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