title: A dendrimer approach to high-spin polycarbenes. Conversion of connectivity from disjoint to non-disjoint by perturbation of nonbonding molecular orbital coefficients.
abstract: [structure: see text] Pentakis(diazo) compound was prepared by coupling 3,5-bis[4-[diazo(4-tert-butyl-2,6-dimethylphenyl)methyl]-3,5-dibromophenylethynyl]phenylacetylene with bis(4-iodo-2,6-dimethylphenyl)diazomethane under Sonogashira reaction conditions. Pentakis(carbene) generated by irradiation of the pentakis(diazo) compound was shown to have a high-spin state with S = 4.4 at 2.0 K.
authors.affiliation: Instrumental Analysis Facilities, Life Science Research Center, Mie University, Tsu, Mie 514-8507, Japan. hirai@chem.mie-u.ac.jp
authors.forename: Katsuyuki
authors.initials: K
authors.lastname: Hirai
authors.forename: Eiko
authors.initials: E
authors.lastname: Kamiya
authors.forename: Tetsuji
authors.initials: T
authors.lastname: Itoh
authors.forename: Hideo
authors.initials: H
authors.lastname: Tomioka