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A new air and water stable ionic liquid (IL) based on rhenium, N-butyl-pyridine perrhenate ([C 4 Py][ReO 4 ]), was synthesized. The density and surface tension of the IL were determined over the temperature range of (293.15–343.15)K. In terms of the Glasser theory of IL and parachor, a series of physico-chemical properties: molecular volume, standard entropy, surface tension, and molar...
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