I'm trying to cyclise the molecule attached and am having trouble when using methods described for similar looking things. I ran a computational model that suggested that at their closest point, the 2 carbons I am trying to form a bond between are 6 Å apart, which is obviously quite far. So I have 2 questions really, 1) how close would the carbons need to be to each other to be able to form a bond (is it just around 1.54 Å, the bond length of a C-C bond)?
2) Are there ways to force these closer together together?
The thing is, computational models usually show the most stable state, but at any temperature above 0K there will be some activated state that has alternate geometry. In organic synthesis the usual way to build this cycle would be to use some metal catalyst that will form a complex with both double bonds in suitable positions and then oxidize it.
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