How does 1,4 H elimination work in butene?

[dRic2]

Hi, I've read that 2-cis-butene gives 1,3-butadiene by "1,4-H elimination". I don't really understand what kind of reaction it is. Does it involve the presence of a radical specie or is it an "auto-elimination"? How does it work?

Thanks !EDIT: How can I change the title to "1,4 H elimination in butene" ?

 

[TeethWhitener]

Conventional wisdom (I.e., my intuition) leads me to believe that—at least in its uncatalyzed incarnation—it’s a pericyclic reaction similar to a retro-Diels Alder. I can’t see the full paper here right at the moment:
https://onlinelibrary.wiley.com/doi/abs/10.1002/kin.550050608
but the words “unimolecular” and “symmetry-forbidden” lead me to believe my intuition is right.

 

[dRic2]

I can't read the full paper, but thanks for the link and the suggestions! :)