Which of the following bridgehead carbocation | vedclass

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(B) The stability of bridgehead carbocations is governed by Bredt's rule and the ability of the bridgehead carbon to adopt a planar $sp^2$ hybridized

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(B) The stability of bridgehead carbocations is governed by Bredt's rule and the ability of the bridgehead carbon to adopt a planar $sp^2$ hybridized geometry.$(1)$ Bredt's rule states that a double bond cannot be placed at the bridgehead of a bridged bicyclic system unless the rings are large enough to accommodate the strain.$(2)$ Among the given options, the $1$-bicyclo$[2.2.2]$octyl cation (Option $B$) is the most stable. In this system, the bridgehead carbon can more easily achieve a near-planar geometry because the rings are larger compared to the other bicyclic systems provided.$(3)$ Smaller bicyclic systems like $[2.2.1]$ (norbornyl) or $[2.1.1]$ systems impose significant angular strain on the bridgehead carbon, making the formation of a planar $sp^2$ carbocation highly unfavorable.Therefore, the correct option is $B$.

Which of the following bridgehead carbocations is the most stable?

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