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Compare the acidities and basicities of the compounds in the first and second row respectively.
In aromatic compounds the methyl group would cause an "ortho" effect. Here we don't have an aromatic compound. Would there still be something like an ortho effect?
I think I got it, but I might be wrong so be prepared.
There will be difference because of the way the carbons in the ring are hybridized. An sp2 hybridization state would make conformations impossible. An sp3 carbon allows both axial and equatorial positions for each group. So there would be no way to ensure that the bulky groups always interact.
The ortho effect is an effect that is closely linked with planarity. Only aromatic/anti-aromatic rings are planar and only the groups attached to aromatic rings can stabilise themselves through the resonance effect. However, in non-aromatic rings like cyclohexane, there is no planarity. The carbons are also sp3 hybridised. So the interaction between the bulky groups will not matter anyways.
