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Issue 25, 2017
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Structural, spectral and magnetic properties of Ni(ii), Co(ii) and Cd(ii) compounds with imidazole derivatives and silanethiolate ligands

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Abstract

A series of new metal heteroleptic complexes have been obtained in simple reactions of 1-(3-aminopropyl)-imidazole (api) and 1,4-bis(imidazol-1-yl)-butane (bbi) ligands with metal silanethiolates or acetylacetonates. The obtained complexes are the coordination polymers [Ni{SSi(tBuO)3}2(μ-api)]n1, [Co{SSi(tBuO)3}2(μ-api)]n2, [Cd{SSi(tBuO)3}2(μ-api)·2CH3OH]n3, [Cd{SSi(tBuO)3}2(μ-bbi)·CHCl3]n4 and the dimer [Co{SSi(tBuO)3}2(μ-bbi)·3CH3OH]25. Another coordination polymer with the formula [Ni(acac)2(μ-bbi)·9CHCl3]n6 was obtained in the reaction of Ni(acac)2 with (tBuO)3SiSH (TBST) and bbi; however, the silanethiolate residue didn't coordinate to the metallic center as intended. The molecular structures of 1–6 were determined by single-crystal X-ray diffraction. Compounds 1–5 were additionally characterized by thermogravimetry (TGA) and powder X-ray diffraction. The emission spectra of the Cd complexes 3 and 4 were recorded in the solid state at ambient temperature, whereas 1, 2 and 5 were subjected to magnetic studies. Variable-temperature magnetic measurements of the polycrystalline sample 1 suggest the presence of weak intra-chain magnetic interactions between the nickel(II) ions. Magnetic studies of 2 and 5 show their paramagnetic behavior. For sample 1 as well as samples 2 and 5, a noticeable influence of single-ion magnetic anisotropy on their magnetic behavior has been revealed.

Graphical abstract: Structural, spectral and magnetic properties of Ni(ii), Co(ii) and Cd(ii) compounds with imidazole derivatives and silanethiolate ligands

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Supplementary files

Article information


Submitted
23 Mar 2017
Accepted
25 May 2017
First published
26 May 2017

CrystEngComm, 2017,19, 3506-3518
Article type
Paper

Structural, spectral and magnetic properties of Ni(II), Co(II) and Cd(II) compounds with imidazole derivatives and silanethiolate ligands

D. Kowalkowska, A. Dołęga, N. Nedelko, Z. Hnatejko, Ł. Ponikiewski, A. Matracka, A. Ślawska-Waniewska, A. Strągowska, K. Słowy, M. Gazda and A. Pladzyk, CrystEngComm, 2017, 19, 3506
DOI: 10.1039/C7CE00555E

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