PREPARATION AND STRUCTURAL STUDYING OF THE TETRACLORIDOZINCATE (II) COMPLEX WITH METHYLENE BLUE - A POTENTIAL ANTIVIRAL AND ANTIMICROBIAL AGENT

Tetrachloridozincate(II) complex [MB]⁺₂[ZnCl₄]^2- (where [MB]+ – methylthioninium cation; methylene blue cation) was synthesized as a result of the  mechanochemical reaction of ZnCl₂×2H₂O hexahydrate with [MB]Cl×5H₂O in the molar ratio 1:2.  The asymmetric unit of the studied compound consists of a [ZnCl₄]^2- anion and two [MB]⁺ cations. Coordination polyhedron of the central atom is regular tetrahedron square planar. The planar [MB]⁺ cations are stacked in an antiparallel mode with sulfur atoms disposed alternatively on opposite sides, and exhibiting π-π stacking at the average interplanar distances of 3.482 Å and 3.478 Å.