00:02
In the set of four dienes, the one that has the double bonds conjugated and both inside the ring will be the most stable.
00:23
So the conjugation stabilizes the double bonds, and then being inside the ring also makes them more stable according to zaitsev's rule.
00:35
The compound that does not have any conjugation will be the least stable.
00:49
So in terms of the delta h of hydrogenation, they're both going to the same product.
01:04
So in terms of the delta h, the least stable compound will have the most negative delta h and the most stable at the least negative delta h.
01:59
So if it's an exothermic reaction and enthalpy of the methyl cyclohexane is lower than the enthalpy of the starting materials.
02:11
Both will have negative delta h's, but the conjugated starting material will have the smaller magnitude or the smaller change in delta h.
02:34
The unconjugated compound will have the largest change in delta h.
02:39
If it happens to be an endothermic process, then both will have positive delta h's, but the conjugated one will have the larger magnitude in that case...