A dendrimer approach to high-spin polycarbenes. Conversion of connectivity from disjoint to non-disjoint by perturbation of nonbonding molecular orbital coefficients.
[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.
Hirai
Katsuyuki
K
Instrumental Analysis Facilities, Life Science Research Center, Mie University, Tsu, Mie 514-8507, Japan. hirai@chem.mie-u.ac.jp
Kamiya
Eiko
E
Itoh
Tetsuji
T
Tomioka
Hideo
H