| Abstract |
The Schiff base H2L1 [N,N -ethylenebis(3-methoxysalicylaldimine)] or H2L2 [N,N -ethylenebis(3-ethoxysalicylaldimine)] was reacted with MCl2 center dot xH(2)O and SnCl4 center dot 5H(2)O to afford the supramolecular heterobimetallic systems (H2ED)(2+)center dot 2[ML]center dot[SnCl6](2-) [M = Cu, L = L-1 (1), L = L-2 (2); M = Ni, L = L-1 (3), L = L-2 (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+)center dot[SnCl6](2-) in 1-4 are encapsulated by the Cu-or Ni-complexes, and stabilized by N-H center dot center dot center dot O and one N-H center dot center dot center dot 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). |
