What is DNP rule?
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In respect to this, are bridgehead Carbocations unstable?
A carbocation is sp2 hybridised. So, the carbon carrying the positive charge and the atoms directly connected to it must lie on the same plane for the cation to be stable. In (a), the carbon atom carrying the positive charge can't assume planar geometry and hence will be highly energetic and unstable.
Beside above, what is a more substituted alkene? The more carbons an alkene is attached to, the more stable it is. Like this: A note on lingo: as we replace hydrogens with carbons, we usually say that the alkene becomes “more substituted”. So alkene stability increases with substitution. This also has an impact on elimination reactions.
Also to know is, what is a bridgehead carbon?
Bridgehead: An atom that is part of two or more rings in a polycyclic molecule. Bridgehead carbons in naphthalene. Bridgehead carbons in 2-chlorobicyclo[2.21]heptane. All eight carbons of cubane are bridgehead atoms.
Why is cyclohexene unstable?
Another difference between cyclohexane and cyclohexene is that the cyclohexane is relatively stable, thus, is less reactive while the cyclohexene is relatively unstable, thus, can undergo reactions due to the presence of a double bond in the ring structure.