Abstract: It has been established that the experimental values of the proton relaxation rates for paramagnetic complexes of nickel and cobalt of the type ML2 [HL = 1,3-diaryl-5-(3-chloro-2-quinoxalyl)formazans] are in good agreement with the values obtained from calculations based on x-ray diffraction data for the isostructural diamagnetic cadmium complex CdL2 under the assumption that the dipole-dipole interaction makes the predominant contribution to the rate of electron-nuclear relaxation of the nucleus under consideration, i.e., under the assumption that tau(1n)-1 approximately r-6, where tau(1n) is the relaxation time of the nucleus under consideration, and r is the distance from the metal cation (the unpaired electron) to that nucleus. The values of r in NiL2 calculated from the experimental values of tau(1n) differ from the analogous distances in CdL2 by +/- 7%.

Cite: Kessenikh A.V. , Shmelev L.V. , Krol' I.A. , Stepanov A.G.
NMR Relaxation, Spectra, and Structure of Paramagnetic Complexes of 1,3-Diaryl-5-quinoxalylformazans in Solution
Journal of Structural Chemistry. 1990. V.31. N2. P.231-238. DOI: 10.1007/bf00752689 WOS Scopus РИНЦ OpenAlex

Original: Кессених А.В. , Шмелев Л.В. , Кроль И.А. , Степанов А.Г.
ЯМР-релаксация, спектры и структура парамагнитных комплексов 1,3-диарил-5-хиноксалилформазанов в растворе
Журнал структурной химии. 1990. Т.31. №2. С.57-64. РИНЦ ANCAN

Dates:

Submitted:	Apr 29, 1988
Published print:	Mar 1, 1990

Identifiers:

Web of science:	WOS:A1990HQ34600009
Scopus:	2-s2.0-34249953912
Elibrary:	47574232
OpenAlex:	W2313355905

Citing: Пока нет цитирований

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