The synthesis of a new imide type anion, methylcarbonate(trifluoromethylsulfonyl)imide (MCTFSI) is described and the physicochemical properties of its sodium and N‐butyl‐N‐methyl pyrrolidinium salts as well as structural information obtained by X‐ray diffraction studies of the sodium salt are discussed in terms of charge delocalisation, coordination chemistry and electrochemical behaviour with respect to the analogous imdides bis(trifluoromethanesulfonyl)imide (TFSI) and bis(fluorosulfonyl)imide (FSI). The insight obtained from studying the new anion informs and reemphasizes the concept of weakly coordinating anions and coordination chemistry in designing electrolyte salts.
Die Synthese eines neuen Imid‐Anions, Methylcarbonat(trifluormethansulfonyl)imid (MCTFSI), und die physikochemischen Eigenschaften seiner Natrium‐ und N‐Butyl‐N‐methylpyrrolidinium‐Salze werden beschrieben. Strukturelle Informationen aus der Röntgenstrukturanalyse des Natriumsalzes werden bezüglich Ladungsverteilung, Koordinationseigenschaften und elektrochemischem Verhalten im Vergleich zu den analogen Imiden Bis(trifluormethansulfonyl)imid (TFSI) und Bis(fluorsulfonyl)imid (FSI) diskutiert. Die aus der Studie des neuen Anions gewonnenen Erkenntnisse unterstreichen und bestärken das Konzept schwach koordinierender Anionen für die gezielte Entwicklung von Elektrolytsalzen.
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