Abstract: Reaction of ethene with singlet [I3C] methylene, generated photochemically from [I3C] diazomethane at four pressures in the range 35-800 Torr, reveals rearrangement of excited [3-I3C] propene (3), the product of insertion, to [l-I3C] propene (1) and [2-I3C] propene (2). This previously unrecognized reaction is formulated as the reverse of the thermal rearrangement of cyclopropane to propene, well known in both thermal and ...
![[13C]methylene Structure](https://image.chemsrc.com/caspic/110/57473-48-0.png)
