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Grade: 12th pass

                        

What is the stability order of the following caions TCPM,DCPM,Cpm,Ph3C+.Ph2CH+tropylium ion.cyclopropenyl ion. Tcpm=tricyclopropyl methyl cation

7 months ago

Answers : (1)

ROSHAN MUJEEB
askIITians Faculty
828 Points
							Tcpm is most stable becauseCH2+ has a vacant p-orbital and a very effective overlapping takes place between p-orbital and electron density of cyclopropane ,and due to this its stability is very high. There is a conjugation between the sigma bond(lone pair) and +ve charge
then DCPM due to the same reason .
then tropilyoum ion die to resonance and equivalent resonating structures
then ph3C+ due to high resonance in three rings
then ph2ch+ due to high resonance due to two rings
cycle propenyl ion is anti aromatic
7 months ago
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