title: Preparation and properties of phosphaethynes bearing bulky aryl groups with electron-donating substituents at the para position.
abstract: Phosphaethynes bearing a 2,6-di-tert-butyl-4-(dimethylamino)phenyl, 2,6-di-tert-butyl-4-methoxyphenyl, or 2,6-di-tert-butylphenyl group were prepared. A (31)P NMR spectroscopic investigation of the chemical shifts indicated that electron-donating groups at the para position cause shifts to a higher field. Bathochromic shifts caused by the electron-donating groups were apparently observed in UV-vis spectra. The structure of 2-[2,6-di-tert-butyl-4-(dimethylamino)phenyl]-1-phosphaethyne was analyzed by X-ray crystallography.
authors.affiliation: Department of Chemistry, Graduate School of Science, Tohoku University, Aoba, Sendai 980-8578, Japan.
authors.forename: Kozo
authors.initials: K
authors.lastname: Toyota
authors.forename: Subaru
authors.initials: S
authors.lastname: Kawasaki
authors.forename: Masaaki
authors.initials: M
authors.lastname: Yoshifuji