NMR Relaxation, Spectra, and Structure of Paramagnetic Complexes of 1,3-Diaryl-5-quinoxalylformazans in Solution Full article
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Journal of Structural Chemistry
ISSN: 0022-4766 , E-ISSN: 1573-8779 |
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Output data | Year: 1990, Volume: 31, Number: 2, Pages: 231-238 Pages count : 8 DOI: 10.1007/bf00752689 | ||||
Tags | Relaxation Rate; Nickel Complex; Cobalt Complex; Paramagnetic Shift; Proton Relaxation Rate | ||||
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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
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
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
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
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:
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