To preview image click here Choose the correct reagents for the following synthesis. 1. Correct reagent(s) for Step I [Select] 2. Correct reagent(s) for Step II 3. Correct reagent(s) for Step III [Select ] 4. Correct reagent(s) for Step IV B. CH3CH2MgBr/THF -OH [Select] [Select] A. 1. CH3CH2OH/MgBr 2. H3O+ = 5. Correct reagents(s) for Step V [Select] C. 1.CH3CH2OMgBr/THF 2. H3O+ OMgBr IV H OH 1 V OH
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.
![To preview image click here
Choose the correct reagents for the following synthesis:
1. Correct reagent(s) for Step I
- [ Select ]
2. Correct reagent(s) for Step II
- [ Select ]
3. Correct reagent(s) for Step III
- [ Select ]
4. Correct reagent(s) for Step IV
- [ Select ]
5. Correct reagent(s) for Step V
- [ Select ]
Options for reagent selection:
- A. 1. CH3CH2OH/MgBr 2. H3O+
- B. CH3CH2MgBr/THF
- C. 1. CH3CH2OMgBr/THF 2. H3O+
### Diagram Explanation:
Below the selection options, there is a series of chemical structures that represent different reaction steps labeled I through V.
- **Step I to Step II**: The structure shows the transformation of a compound containing a hydroxyl group (OH) and a carbonyl group into another compound, suggesting a reaction involving the carbonyl functionality.
- **Step II to Step III**: This step indicates a cyclization process where a new ring is formed, converting one functional group into a cyclic ether.
- **Step III to Step IV**: A Grignard reagent (OMgBr) appears here, implying the use of an organometallic reagent in the reaction.
- **Step IV to Step V**: The structure suggests the transfer of a functional group to form a new nitrogen-containing heterocycle, completing the synthesis.
Each step likely involves specific reagents that facilitate the transformations described. These reagents are chosen via a dropdown selection for each step.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fd28bb5a8-7114-481e-95e9-134d2c6aa143%2F8093c847-3388-492c-8ade-34bb48dbe439%2F4w37lbg_processed.jpeg&w=3840&q=75)
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