Question

The following model represents the carbocation intermediate formed in the addition reaction of HBr to two different alkenes. Draw structures for both alkenes. wireframe M - + labels • You do not have to consider stereochemistry. • Draw one structure per sketcher. Add additional sketchers using the drop-down menu in the bottom right corner. • Separate structures with + signs from the drop-down menu.

Answer 1

In the reaction of alkene with HBr, carbocation intermediate is formed by the protonation of the alkene that is by taking proton from HBr. Now, the given carbocation can be formed from two different alkene by reaction with HBr.

Structure of alkenes and mechanism of their formation is given below-

The structure of the cation is given as- H - -U- エーパー土 I- I Mechanism for as below - for Carbocation Carbocation form formation from the reaction of alkene and HBr is. R-CH=CH₂ H-Bv R - Q Hz Now, the given carbocation can be formed from the following two alkeno. H₂ C - CH₂ - CH₂ -CH=CH₂ ② H₃C- CH₂ - CH = CH – CH₂ 1 : 2 Mechanism for the formation of the given carbocation from the two alkenes are as follows- H₂ C- CH₂ - CH2 - CH = CH HBr H₂ C- CH₂ - CH₂ - CH₂ ③ H, C- CH₂ - CH = CH – CH3 HEB H₂ - CH2 - CH₂ - CH-CH₂ Therefore, the structures of the two alenes are- н н н нннн 1 1 1 j ac-C-H H-C- cca. Hoci H HH I-n-I н н HC - - 1 ジェーロー H