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A modified synthesis of 1-butyl-3-methylimidazolium bromide (BMImBr) was suggested and performed, and some physicochemical properties of the product containing 0.64–13.6 wt % water were determined. Water increased the electrical conductivity and decreased the viscosity and melting point of the substance but weakly influenced its density. Water in amounts of 5–8 wt % (45–50 mol %) caused structural changes. The BMImBr · 0.5H 2 O crystal hydrate was found to be stable thermodynamically.
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Ramenskaya et al. (2008) studied this question.
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