抄録
We have prepared various ionic liquids containing cationic organometallic complexes, which exhibit intriguing physical properties and chemical reactivities. This review describes molecular design, preparation, and crystal structures of organometallic ionic liquids and related materials. Two topics are discussed, in which X-ray crystallography played an important role: magnetic-field effects on the crystallization of ferrocenium ionic liquids, and odd-even effects on the melting phenomenon of cobaltocenium ionic liquids.
