Cyclopropylcarbinyl ring opening as mechanistic probe for differentiation between the singlet and triplet spin states of trimethylenemethane diradicals (non-Kekule species)
作者:Waldemar Adam、Ralf Finzel
DOI:10.1021/ja00038a018
日期:1992.6
The cyclopropylcarbinyl rearrangement of the non-Kekule 2-alkylidene-1,3-cyclopentanediyl diradical (S-2b and T-2b), generated by thermal and direct and triplet-sensitized photochemical denitrogenation of the corresponding azoalkane 1b, was explored. While in the triplet-sensitized photolysis at moderate temperatures no cyclopropylcarbinyl rearrangement took place, in the singlet manifold (thermolysis