Abstract Transformations of methylenespiro [2, 3] hexane (MSH) on a heterogeneous rhenium-alumina metathesis (disproportionation) catalyst were studied. It was found that, owing to a significant difference in the stability of carbenic complexes of methylene and disubstituted carbenes, MSH undergoes isomerization to 4-methylspiro [2, 3] hex-4-ene followed by their cometathesis yielding bis (spiro [2, 3] hexylidene-4). The feasibility of ...
![6-methylidenespiro[2.3]hexane Structure](https://image.chemsrc.com/caspic/468/137072-99-2.png)
![4-(2-(1-(prop-1-en-2-yl)cyclopropyl)ethylidene)spiro[2.3]hexane Structure](https://image.chemsrc.com/caspic/415/1207344-09-9.png)
