Issue 49, 2020, Issue in Progress
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RSC Advances

Novel tetrahedral cobalt(ii) silanethiolates: structures and magnetism†

Daria Kowalkowska-Zedler,a   Natalia Nedelko,b   Katarzyna Kazimierczuk,a   Pavlo Aleshkevych,b   Renata Łyszczek,c   Anna Ślawska-Waniewska*b  and  Agnieszka Pladzyk ORCID logo *a  

* Corresponding authors

a Department of Inorganic Chemistry, Faculty of Chemistry, Gdańsk University of Technology, Narutowicza Str. 11/12, 80-233 Gdańsk, Poland
E-mail: agnieszka.pladzyk@pg.edu.pl

b Institute of Physics, Polish Academy of Sciences, Aleja Lotników 32/46, 02-668 Warsaw, Poland

c Department of Coordination and General Chemistry and Crystallography, Institute of Chemical Sciences, Faculty of Chemistry, Maria Curie-Skłodowska University in Lublin, M.C. Skłodowska Sq. 2, 20-031 Lublin, Poland

Abstract

Three heteroleptic complexes of Co(II) tri-tert-butoxysilanethiolates have been synthesized with piperidine [Co{SSi(OtBu)3}2(ppd)2] 1, piperazine [Co{SSi(OtBu)3}2(NH3)]2(μ-ppz)·2CH3CN 2, and N-ethylimidazole [Co{SSi(OtBu)3}2(etim)2] 3. The complexes have been characterized by a single-crystal X-ray, revealing their tetrahedral geometry on Co(II) coordinated by two nitrogen and two sulfur atoms. Complexes 1 and 3 are mononuclear, whereas 2 is binuclear. The spectral properties and thermal properties of 1–3 complexes were established by FTIR spectroscopy for solid samples and TGA. The magnetic properties of complexes 1, 2, and 3 have been investigated by static magnetic measurements and X-band EPR spectroscopy. These studies have shown that 1 and 3, regardless of the similarity in structure of CoN2S2 cores, demonstrate different types of local magnetic anisotropy. Magnetic investigations of 2 reveal the presence of weak antiferromagnetic intra-molecular Co(II)–Co(II) interactions that are strongly influenced by the local magnetic anisotropy of individual Co(II) ions.

Graphical abstract: Novel tetrahedral cobalt(ii) silanethiolates: structures and magnetism

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Article information

DOI
https://doi.org/10.1039/D0RA06036D
Article type
Paper
Submitted
10 Jul 2020
Accepted
31 Jul 2020
First published
06 Aug 2020
This article is Open Access
Creative Commons BY-NC license

RSC Adv., 2020,10, 29100-29108

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Novel tetrahedral cobalt(II) silanethiolates: structures and magnetism

D. Kowalkowska-Zedler, N. Nedelko, K. Kazimierczuk, P. Aleshkevych, R. Łyszczek, A. Ślawska-Waniewska and A. Pladzyk, RSC Adv., 2020, 10, 29100 DOI: 10.1039/D0RA06036D

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