Two salts were prepared by methyl-ation of the respective imidazoline-2-thione at the sulfur atom, using Meerwein's salt (tri-methyl-oxonium tetra-fluorido-borate) in CHCl. 1,3-Dimeth-oxy-2-(methyl-sulfan-yl)imidazolium tetra-fluorido-borate (), CHNOS·BF , displays a conformation of its two meth-oxy groups relative to each other whereas the two benz-yloxy groups present in 1,3-dibenz-yloxy-2-(methyl-sulfan-yl)imidazolium tetra-fluorido-borate (), CHNOS·BF , adopt an conformation. In the mol-ecules of and , the methyl-sulfanyl group is rotated out of the plane of the respective heterocyclic ring. In both crystal structures, inter-molecular inter-actions are dominated by C-H⋯F-B contacts, leading to three-dimensional networks. The tetra-fluorido-borate counter-ion of is disordered over three orientations (occupancy ratio 0.42:0.34:0.24), which are related by rotation about one of the B-F bonds.
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| http://dx.doi.org/10.1107/S2056989020003643 | DOI Listing |
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