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Effects of Ring Size on Spectral Properties of Copper(II)‐Diaminodiamide Complexes in Aqueous Solution
Author(s) -
Len ChingHohn,
Chung ChungSun
Publication year - 1991
Publication title -
journal of the chinese chemical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.329
H-Index - 45
eISSN - 2192-6549
pISSN - 0009-4536
DOI - 10.1002/jccs.199100073
Subject(s) - chemistry , copper , ring size , aqueous solution , ring (chemistry) , chelation , absorption (acoustics) , ion , absorption spectroscopy , spectral line , inorganic chemistry , analytical chemistry (journal) , organic chemistry , physics , quantum mechanics , astronomy , acoustics
The electronic absorption spectra of aqueous solutions containing copper(II) ion and N, N′‐bis(carbamoylmethyl)trimethylenediamine(L‐1, 3, 1) at 25.0 ± 0.1°C and 0.10 mol L −1 NaClO 4 , were measured as a function of pH. The absorption maxima and the molar absorptivities of [Cu(L‐l, 3, l)] 2+ , [Cu(H. 1 L‐1, 3, 1)] + , and [Cu(H ‐2 L‐l, 3, l)] were calculated from these spectra. A comparison of the spectral parameters of these complexes with those of the copper(lI)‐diaminodiamide complexes containing 6, 5, 6‐and 6, 6, 6‐membered ring systems indicates that the chelate ring size has significant effects on these spectral parameters.