,
volume 45
,
issue 6
,
pages 402-410
Spin State of the Iron(II) and Cobalt(II) 2,6-Di(5-Amino-1H-Pyrazol-3-yl)pyridine Complexes in Solution and in Crystal
A. A. Pavlov
1
,
I A Nikovskii
1
,
A V Polezhaev
1, 2
,
D Yu Aleshin
1, 3
,
E K Melnikova
1, 4
,
Ya A Pankratova
4
,
Yu V Nelyubina
1, 5
Publication type: Journal Article
Publication date: 2019-06-24
scimago Q4
wos Q4
SJR: 0.189
CiteScore: 1.7
Impact factor: 1.1
ISSN: 10703284, 16083318
General Chemistry
General Chemical Engineering
Abstract
The cobalt(II) and iron(II) complexes with 2,6-di(5-amino-1H-pyrazol-3-yl)pyridine (L), CoL2(ClO4)2 (I) and FeL2(ClO4)2 (II), are synthesized by the template reaction, isolated in the individual form, and characterized by elemental analysis, NMR spectroscopy, and thermogravimetry. The structures of complexes I and II (including the iron(II) complex obtained as two new solvate forms (FeL2(ClO4)2 ∙ 2(C2H5)2O ∙ H3CN (IIa) and FeL2(ClO4)2 ∙ (C2H5)2O ∙ CH3CN ∙ 0.75H2O (IIb)) are confirmed by X-ray diffraction analysis. The data obtained in the crystal (by the X-ray diffraction method) and in solutions (using the proposed approach to an analysis of paramagnetic shifts in 1H NMR spectra) indicate that the metal ion in the complexes exists in the high-spin state (S = 3/2 for Co(II) and S = 2 for Fe(II)) and undergoes no temperature-induced spin transition in a range of 120–300 K.
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Pavlov A. A. et al. Spin State of the Iron(II) and Cobalt(II) 2,6-Di(5-Amino-1H-Pyrazol-3-yl)pyridine Complexes in Solution and in Crystal // Russian Journal of Coordination Chemistry/Koordinatsionnaya Khimiya. 2019. Vol. 45. No. 6. pp. 402-410.
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Pavlov A. A., Nikovskii I. A., Polezhaev A. V., Aleshin D. Yu., Melnikova E. K., Pankratova Ya. A., Nelyubina Yu. V. Spin State of the Iron(II) and Cobalt(II) 2,6-Di(5-Amino-1H-Pyrazol-3-yl)pyridine Complexes in Solution and in Crystal // Russian Journal of Coordination Chemistry/Koordinatsionnaya Khimiya. 2019. Vol. 45. No. 6. pp. 402-410.
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TY - JOUR
DO - 10.1134/S1070328419060046
UR - https://doi.org/10.1134/S1070328419060046
TI - Spin State of the Iron(II) and Cobalt(II) 2,6-Di(5-Amino-1H-Pyrazol-3-yl)pyridine Complexes in Solution and in Crystal
T2 - Russian Journal of Coordination Chemistry/Koordinatsionnaya Khimiya
AU - Pavlov, A. A.
AU - Nikovskii, I A
AU - Polezhaev, A V
AU - Aleshin, D Yu
AU - Melnikova, E K
AU - Pankratova, Ya A
AU - Nelyubina, Yu V
PY - 2019
DA - 2019/06/24
PB - Pleiades Publishing
SP - 402-410
IS - 6
VL - 45
SN - 1070-3284
SN - 1608-3318
ER -
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BibTex (up to 50 authors)
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@article{2019_Pavlov,
author = {A. A. Pavlov and I A Nikovskii and A V Polezhaev and D Yu Aleshin and E K Melnikova and Ya A Pankratova and Yu V Nelyubina},
title = {Spin State of the Iron(II) and Cobalt(II) 2,6-Di(5-Amino-1H-Pyrazol-3-yl)pyridine Complexes in Solution and in Crystal},
journal = {Russian Journal of Coordination Chemistry/Koordinatsionnaya Khimiya},
year = {2019},
volume = {45},
publisher = {Pleiades Publishing},
month = {jun},
url = {https://doi.org/10.1134/S1070328419060046},
number = {6},
pages = {402--410},
doi = {10.1134/S1070328419060046}
}
Cite this
MLA
Copy
Pavlov, A. A., et al. “Spin State of the Iron(II) and Cobalt(II) 2,6-Di(5-Amino-1H-Pyrazol-3-yl)pyridine Complexes in Solution and in Crystal.” Russian Journal of Coordination Chemistry/Koordinatsionnaya Khimiya, vol. 45, no. 6, Jun. 2019, pp. 402-410. https://doi.org/10.1134/S1070328419060046.