title: The first isolable pentacoordinate 1,2 lambda 5-azaphosphetine: synthesis, X-ray crystallographic analysis, and dynamic behaviour.
abstract: Cycloaddition reaction of an iminophosphorane bearing the Martin ligand with an alkyne gave the first stable 1,2 lambda 5-azaphosphetine, whose structure was determined by X-ray crystallographic analysis, and variable temperature NMR spectroscopy revealed the existence of equilibrium with the corresponding alpha-iminoalkylidenephosphorane.
authors.affiliation: Department of Chemistry, Graduate School of Science, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan.
authors.forename: N
authors.initials: N
authors.lastname: Kano
authors.forename: A
authors.initials: A
authors.lastname: Kikuchi
authors.forename: T
authors.initials: T
authors.lastname: Kawashima