Question

.. now the step by step mechanism to account for the followine transformation. Also predict the major product formed. (20 points) он conc. HBr - CH₂ HOC HCX X H3CX Bi CHE Syl condition HAC CHO HEC CH3 Br с CH

Answer 1

Ho good Leaving group roy / M eny HBr #+B5 - -H2O Formation af CarboGtion Path/ Patha 12 Corsoglion Attack of Nucleophite). Attack of in methyl shift Nucleophile) Rearrangement Jomocation to major product) 3 Carbocation grain Stability Ley stable E- - - - --(more stableT. - Reaction proceed via formatie Carbocation. 2) Carbocation rearranges to give stable cerbocahon. 3) (3) Stable Consocation giver major Produce. (Pethi) 4) (2) Less stable Colocation gives minor Product Path 2) reory of Nucleaphite) Minor Trochet
SNI Reactions occurs via carbocation formation. carbocation if forms in a reaction then it can rearranges to give more stable carbocation . In next step nucleophile attacks on the carbocation. Major product will from when nucleophile attack on relatively more stable carbocation and minor product forms when Nucleophile attacks on less stable carbocation .
Slept Proknation HIST +Br step 2 Removal of the . (r Breaking af Bond) Slow step R.D.S con A 2 Celso Cation formation -- information - (Less stable) Minor Redut Rate Determining step in an Rate Law Raki Orderal Rearrangement of cabocation to give stable conho Cation ( 2 3 ) vin che methyl Shift V to give shole cabochin cascation Step 3 a (major Produd)