Reactive Intermediates
In chemistry, reactive intermediates are termed as short-lived, highly reactive atoms with high energy. They rapidly transform into stable particles during a chemical reaction. In specific cases, by means of matrix isolation and at low-temperature reactive intermediates can be isolated.
Hydride Shift
A hydride shift is a rearrangement of a hydrogen atom in a carbocation that occurs to make the molecule more stable. In organic chemistry, rearrangement of the carbocation is very easily seen. This rearrangement can be because of the movement of a carbocation to attain stability in the compound. Such structural reorganization movement is called a shift within molecules. After the shifting of carbocation over the different carbon then they form structural isomers of the previous existing molecule.
Vinylic Carbocation
A carbocation where the positive charge is on the alkene carbon is known as the vinyl carbocation or vinyl cation. The empirical formula for vinyl cation is C2H3+. In the vinyl carbocation, the positive charge is on the carbon atom with the double bond therefore it is sp hybridized. It is known to be a part of various reactions, for example, electrophilic addition of alkynes and solvolysis as well. It plays the role of a reactive intermediate in these reactions.
Cycloheptatrienyl Cation
It is an aromatic carbocation having a general formula, [C7 H7]+. It is also known as the aromatic tropylium ion. Its name is derived from the molecule tropine, which is a seven membered carbon atom ring. Cycloheptatriene or tropylidene was first synthesized from tropine.
Stability of Vinyl Carbocation
Carbocations are positively charged carbon atoms. It is also known as a carbonium ion.
Draw the major product of this reaction. Ignore inorganic byproducts and the alcohol side product
![**Organic Chemistry Reaction Exercise**
**Question 19 of 27**
**Objective:** Draw the major product of this reaction. Ignore inorganic byproducts and the alcohol side product.
**Reaction Details:**
1. **Starting Compound:** An ester with a benzene ring as the aryl group.
2. **Reagents:**
- Step 1: CH₃MgBr (excess) - Methylmagnesium bromide, a Grignard reagent.
- Step 2: H₂O - Water for the work-up process.
**Instructions:**
Use the provided reaction scheme to draw the major organic product.
**Diagram Description:**
- The starting material is an ester consisting of a phenyl group attached to the carbonyl carbon, which is bonded to an ethoxy group (R-O-R’ where R is ethyl).
- A downward arrow indicates the introduction of reagents:
1. CH₃MgBr in excess, followed by
2. H₂O.
- At the bottom is a dashed rectangle labeled "Select to Draw," where you will sketch the major product of this reaction after ignoring inorganic byproducts and side alcohol.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F92b3c378-2f30-4fe2-8c53-5c4a341ea352%2Ff049d5db-a9ac-498f-889f-a7dc70bc90eb%2Fco1913s_processed.png&w=3840&q=75)
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