UV-LASER PHOTOCHEMISTRY: GENERATION OF THE TRIPLET SPIRONONA-4,7-DIYL DIRADICAL BY NITROGEN EXTRUSION FROM THE AZOALKANE 6,7-DIAZASPIRO. CONFORMATIONAL INFLUENCE ON THE LIFETIME OF A 1,4-CYCLOHEPTADIYL AS DE

Article abstract of DOI:10.1016/S0040-4039(00)80832-1

Using the cyclopropylcarbinyl rearrangement, the lifetime of the triplet diradical spiro<2.6>nona-4,7-diyl was estimated as 0.3 < ³τ < 3.3 ns; the short triplet lifetime of this localized 1,4-diradical is rationalized in terms of fast ISC out o