Synthesis and crystal structure of a new pyridinium bromide salt: 4-methyl-1-(3-phenoxypropyl)pyridinium bromide

Abstract

In the cation of the title molecular salt, C 15 H 18 NO + Br-, the pyridinium and phenyl rings are inclined to one another by 11.80(8). In the crystal, the Br-anion is linked to the cation by a C-HBr hydrogen bond. The cations stack along the b-axis direction and are linked by further C-HBr interactions, and offset-interactions [intercentroid distances = 3.5733(19) and 3.8457(19)Å], forming slabs parallel to the ab plane. The effects of the C-HX-interaction on the NMR signals of the ortho-and meta-pyridinium protons in a series of related ionic liquids, viz. 4-methyl-1-(4-phenoxybutyl)pyridin-1-ium salts, are reported and discussed.