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Novel tetrahedral cobalt(II) silanethiolates: structures and magnetism

Abstrakt

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.

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Kategoria:
Publikacja w czasopiśmie
Typ:
artykuły w czasopismach
Opublikowano w:
RSC Advances nr 10, strony 29100 - 29108,
ISSN: 2046-2069
Język:
angielski
Rok wydania:
2020
Opis bibliograficzny:
Kowalkowska-Zedler D., Nedelko N., Kazimierczuk K., Aleshkevych P., Łyszczek R., Ślawska-Waniewska A., Pladzyk A.: Novel tetrahedral cobalt(II) silanethiolates: structures and magnetism// RSC Advances -Vol. 10,iss. 49 (2020), s.29100-29108
DOI:
Cyfrowy identyfikator dokumentu elektronicznego (otwiera się w nowej karcie) 10.1039/d0ra06036d
Weryfikacja:
Politechnika Gdańska

wyświetlono 142 razy

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