Journal
ELECTROCHIMICA ACTA
Volume 46, Issue 10-11, Pages 1753-1757Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/S0013-4686(00)00781-7
Keywords
pyrrolidinium; tetrafluoroborate; plastic crystal phases; molten salts; ionic liquids
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A series of N-methyl-N-alkylpyrrolidinium tetrafluoroborate salts were synthesised. The spectroscopic, physical and electrochemical characteristics of this family of salts have been investigated with respect to potential usage as ionic solvents and electrolytes. The lowest melting point among the family is 64 degreesC for the N-methyl-N-propylpyrrolidinium tetrafluoroborate (P13BF4). This is sufficiently low to enable this salt to be useful as an ionic liquid in chemical synthesis involving reactions above 70 degreesC. Most of the compounds exhibit one or more solid-solid transitions below the melting point, this behaviour is thought to indicate the existence of plastic crystal phases. (C) 2001 Elsevier Science Ltd. All rights reserved.
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