Quintet Bis(carbene) from Triplet Diarylcarbenes Introduced at the 1,8-Position of Anthracene
journal contribution
posted on 2004-03-04, 00:00 authored by Yusuke Ohtsuka, Tetsuji Itoh, Katsuyuki Hirai, Takeji Takui, Hideo Tomioka[9-{10-Phenyl}anthryl](4-bromo-2,6-dimethylphenyl)diazomethane was found to be stable enough to survive Sonogashira coupling reaction
conditions and was converted to [9-{10-phenyl}anthryl](4-trimethylsilylethynyl-2,6-dimethylphenyl)diazomethane, which was reacted with 1,8-diiodoanthracene to give bis(diazo) compound. Bis(carbene) generated by irradiation of the bis(diazo) compound generated a fairly persistent
S = 2 quintet state.
