title: Bis-3-oxo-lambda5-phosphole: isolation, structural analyses, and synthesis of phosphorus-ylide containing conjugated heterocycle.
abstract: A new class of phosphorus-ylide containing conjugate heterocycle was isolated from a mixture of colored products of the reaction of a silylphosphine and dimethyl acetylenedicarboxylate. The structure was determined and the selective synthesis was developed. The indigo-like bis-phosphole structure appears a green to blue color, which is derived from the low energy-gap of the phosphole.
authors.affiliation: Department of Materials Science and Biotechnology, Graduate School of Science and Engineering, Ehime University, 3 Bunkyo-cho, Matsuyama 790-8577, Japan.
authors.forename: Yasunobu
authors.initials: Y
authors.lastname: Nishimura
authors.forename: Yuka
authors.initials: Y
authors.lastname: Kawamura
authors.forename: Yutaka
authors.initials: Y
authors.lastname: Watanabe
authors.forename: Minoru
authors.initials: M
authors.lastname: Hayashi