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Updated: Aug 22, 2025

From Molecules to Materials: Engineering New Ionic Liquid Crystals Through Halogen Bonding
Published on: March 24, 2018
1-Benzyl-3-methyl-imidazolium bromide
Tim Peppel1, Christoph Wulf1, Anke Spannenberg1
1Leibniz-Institut für Katalyse e. V., Albert-Einstein-Str. 29a, 18059 Rostock, Germany.
Abstract:
The title compound, (BenzMIm)Br (BenzMIm=1-benzyl-3-methyl-imidazo-l-ium), C11H13N2 +·Br-, was obtained as single crystals directly from a pure and liquid sample of the compound over several weeks. The mol-ecular structure of (BenzMIm)Br consists of separated bromide anions and 1-benzyl-3-methyl-imidazolium cations connected via short C-H⋯Br contacts. The compound exhibits a relatively low melting point (m.p. = 72°C) and is a supercooled, highly viscous transparent liquid at ambient conditions. The title compound crystallizes with two unique ion pairs in the asymmetric unit of the orthorhombic unit cell.
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