Journal
CHEMISTRY-A EUROPEAN JOURNAL
Volume 18, Issue 26, Pages 8070-8075Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/chem.201200157
Keywords
carbonyl complexes; ionic liquids; ligand exchange; metallocenes; phase transitions
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Funding
- KAKENHI [21350077]
- Grants-in-Aid for Scientific Research [21350077] Funding Source: KAKEN
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The piano-stool half-metallocenium cations [Fe(C5R5)(CO)2L]+ (C5R5=C5H5, C5Me5, C5Me4Et; L=1-pentene, nBuCN, MeCN, Me2S, NH3, NMe3, pyridine) provide ionic liquids (ILs) with the bis(trifluoromethanesulfonyl)imide (Tf2N) anion without introducing long alkyl chains. Their melting points are affected by molecular symmetry, and their thermal stabilities reflect the strength of the metalligand bonding. These are reactive liquids that show solventless ligand exchange reactions by gas absorption. The direction of the ligand-exchange reaction is correlated with the stabilities. Based on the variation of the melting points, these ILs undergo transformations between the liquid and solid phases associated with the reaction.
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