title: β-Protic pyrazole and N-heterocyclic carbene complexes: synthesis, properties, and metal-ligand cooperative bifunctional catalysis.
abstract: This Minireview provides an overview of the chemistry of pyrazole and N-heterocyclic carbene (NHC) complexes bearing an NH group at the β-position to the metal. The synthesis and structures as well as the Brønsted acidic nature of the β-NH group are described in detail. These complexes are attractive candidates for novel metal-ligand cooperative bifunctional catalysts, which would benefit highly effective molecular and energy transformations.
authors.affiliation: Department of Applied Chemistry, Graduate School of Science and Engineering, Tokyo Institute of Technology, Okayama, Meguro-ku, Tokyo 152-8552, Japan. skuwata@apc.titech.ac.jp
authors.forename: Shigeki
authors.initials: S
authors.lastname: Kuwata
authors.forename: Takao
authors.initials: T
authors.lastname: Ikariya