Synthesis, structures and magnetic properties of octahedral Co(III) complexes of heteroaromatic hydrazones with tetraisothiocyanato Co(II) anions

Octahedral Co(III) complexes with heteroaromatic hydrazones ((E)-N,N,N-trimethyl-2-oxo-2-(2-(1-(pyridin-2-yl)ethylidene)hydrazinyl)ethan-1-aminium chloride and (E)-2-(1-(thiazol-2-yl)ethylidene)hydrazine-1-carbothioamide) and tetraisothiocyanato Co(II) complex anions have been synthesized, characterized by elemental analysis, IR and NMR spectroscopy, single-crystal X-ray diffraction and magnetic measurements. NMR spectroscopy showed that octahedral Co(III) complex cations of both compounds are stable in DMSO solution. Measured effective magnetic moments, which completely originates from complex anion [Co(NCS)(4)](2-) are practically constant and very close to the expected value for Co2+ ion with spin S = 3/2 and completely quenched orbital angular momentum. Co(III) ions in octahedral complex cations are in a low spin magnetic state with S = 0 and do not contribute to the magnetic signal.

Keywords:

Thiocyanate / Hydrazones / Co(III) and Co(II) complexes / X-ray / Magnetic properties

Source:
Polyhedron, 2018, 155, 425-432

Publisher:

Oxford : Pergamon-Elsevier Science Ltd

Funding / projects:

Interactions of natural products, their derivatives and coordination compounds with proteins and nucleic acids (RS-172055)
Slovenian Research Agency (P-0175 and P2-0348)

Note:

This is the peer-reviewed version of the article: Čobeljić, B., Turel, I., Pevec, A., Jagličić, Z., Radanović, D., Anđelković, K.,& Milenković, M. R. (2018). Synthesis, structures and magnetic properties of octahedral Co(III) complexes of heteroaromatic hydrazones with tetraisothiocyanato Co(II) anions. Polyhedron, 155, 425-432. https://doi.org/10.1016/j.poly.2018.08.070
The published version: https://cer.ihtm.bg.ac.rs/handle/123456789/2374

DOI: 10.1016/j.poly.2018.08.070

ISSN: 0277-5387

WoS: 000449137000051

Scopus: 2-s2.0-85053480667

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	5

TY  - JOUR
AU  - Čobeljić, Božidar
AU  - Turel, Iztok
AU  - Pevec, Andrej
AU  - Jagličić, Zvonko
AU  - Radanović, Dušanka
AU  - Anđelković, Katarina
AU  - Milenković, Milica R.
PY  - 2018
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/2374
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/4286
AB  - Octahedral Co(III) complexes with heteroaromatic hydrazones ((E)-N,N,N-trimethyl-2-oxo-2-(2-(1-(pyridin-2-yl)ethylidene)hydrazinyl)ethan-1-aminium chloride and (E)-2-(1-(thiazol-2-yl)ethylidene)hydrazine-1-carbothioamide) and tetraisothiocyanato Co(II) complex anions have been synthesized, characterized by elemental analysis, IR and NMR spectroscopy, single-crystal X-ray diffraction and magnetic measurements. NMR spectroscopy showed that octahedral Co(III) complex cations of both compounds are stable in DMSO solution. Measured effective magnetic moments, which completely originates from complex anion [Co(NCS)(4)](2-) are practically constant and very close to the expected value for Co2+ ion with spin S = 3/2 and completely quenched orbital angular momentum. Co(III) ions in octahedral complex cations are in a low spin magnetic state with S = 0 and do not contribute to the magnetic signal.
PB  - Oxford : Pergamon-Elsevier Science Ltd
T2  - Polyhedron
T1  - Synthesis, structures and magnetic properties of octahedral Co(III) complexes of heteroaromatic hydrazones with tetraisothiocyanato Co(II) anions
VL  - 155
SP  - 425
EP  - 432
DO  - 10.1016/j.poly.2018.08.070
ER  -

@article{
author = "Čobeljić, Božidar and Turel, Iztok and Pevec, Andrej and Jagličić, Zvonko and Radanović, Dušanka and Anđelković, Katarina and Milenković, Milica R.",
year = "2018",
abstract = "Octahedral Co(III) complexes with heteroaromatic hydrazones ((E)-N,N,N-trimethyl-2-oxo-2-(2-(1-(pyridin-2-yl)ethylidene)hydrazinyl)ethan-1-aminium chloride and (E)-2-(1-(thiazol-2-yl)ethylidene)hydrazine-1-carbothioamide) and tetraisothiocyanato Co(II) complex anions have been synthesized, characterized by elemental analysis, IR and NMR spectroscopy, single-crystal X-ray diffraction and magnetic measurements. NMR spectroscopy showed that octahedral Co(III) complex cations of both compounds are stable in DMSO solution. Measured effective magnetic moments, which completely originates from complex anion [Co(NCS)(4)](2-) are practically constant and very close to the expected value for Co2+ ion with spin S = 3/2 and completely quenched orbital angular momentum. Co(III) ions in octahedral complex cations are in a low spin magnetic state with S = 0 and do not contribute to the magnetic signal.",
publisher = "Oxford : Pergamon-Elsevier Science Ltd",
journal = "Polyhedron",
title = "Synthesis, structures and magnetic properties of octahedral Co(III) complexes of heteroaromatic hydrazones with tetraisothiocyanato Co(II) anions",
volume = "155",
pages = "425-432",
doi = "10.1016/j.poly.2018.08.070"
}

Čobeljić, B., Turel, I., Pevec, A., Jagličić, Z., Radanović, D., Anđelković, K.,& Milenković, M. R.. (2018). Synthesis, structures and magnetic properties of octahedral Co(III) complexes of heteroaromatic hydrazones with tetraisothiocyanato Co(II) anions. in Polyhedron
Oxford : Pergamon-Elsevier Science Ltd., 155, 425-432.
https://doi.org/10.1016/j.poly.2018.08.070

Čobeljić B, Turel I, Pevec A, Jagličić Z, Radanović D, Anđelković K, Milenković MR. Synthesis, structures and magnetic properties of octahedral Co(III) complexes of heteroaromatic hydrazones with tetraisothiocyanato Co(II) anions. in Polyhedron. 2018;155:425-432.
doi:10.1016/j.poly.2018.08.070 .

Čobeljić, Božidar, Turel, Iztok, Pevec, Andrej, Jagličić, Zvonko, Radanović, Dušanka, Anđelković, Katarina, Milenković, Milica R., "Synthesis, structures and magnetic properties of octahedral Co(III) complexes of heteroaromatic hydrazones with tetraisothiocyanato Co(II) anions" in Polyhedron, 155 (2018):425-432,
https://doi.org/10.1016/j.poly.2018.08.070 . .