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Issue 44, 2016
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N–H⋯O and N–H⋯Cl supported 1D chains of heterobimetallic CuII/NiII–SnIV cocrystals

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Abstract

The Schiff base H2L1 [N,N′-ethylenebis(3-methoxysalicylaldimine)] or H2L2 [N,N′-ethylenebis(3-ethoxysalicylaldimine)] was reacted with MCl2·xH2O and SnCl4·5H2O to afford the supramolecular heterobimetallic systems (H2ED)2+·2[ML]·[SnCl6]2− [M = Cu, L = L1 (1), L = L2 (2); M = Ni, L = L1 (3), L = L2 (4); ED = 1,2-ethylenediamine], whose structures were established by single crystal X-ray analyses. Each structure includes different entities, viz. a mononuclear [CuL]/[NiL] neutral complex (coformer), a hexachlorostannate dianion [SnCl6]2−, a 1,2-ethylenediammonium dication (H2ED2+) and, only in 2 and 4, a methanol molecule. Based on the work of Grothe et al. (Cryst. Growth Des., 2016, 16, 3237–3243), compounds 1 and 3 are cocrystal salts, 2 and 4 are cocrystal salt solvates. The ionic pairs (H2ED)2+·[SnCl6]2− in 1–4 are encapsulated by the Cu- or Ni-complexes, and stabilized by N–H⋯O and one N–H⋯Cl bond interactions leading to infinite 1D chains. The antimicrobial studies of 1–4 against yeasts (C. albicans and S. cerevisiae) and Gram-positive (S. aureus and E. faecalis) and -negative bacteria (P. aeruginosa and E. coli) indicate that the Ni2Sn systems (3 and 4) are more active than the analogous Cu2Sn ones (1 and 2).

Graphical abstract: N–H⋯O and N–H⋯Cl supported 1D chains of heterobimetallic CuII/NiII–SnIV cocrystals

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Publication details

The article was received on 05 Aug 2016, accepted on 11 Oct 2016 and first published on 12 Oct 2016


Article type: Paper
DOI: 10.1039/C6DT03118H
Citation: Dalton Trans., 2016,45, 17929-17938
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    N–H⋯O and N–H⋯Cl supported 1D chains of heterobimetallic CuII/NiII–SnIV cocrystals

    S. Hazra, R. Meyrelles, A. J. Charmier, P. Rijo, M. F. C. Guedes da Silva and A. J. L. Pombeiro, Dalton Trans., 2016, 45, 17929
    DOI: 10.1039/C6DT03118H

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