1. Predict one major product. a. b. C. Et CI 1. DBU 2. BH3 • THF 3. H₂O2, NaOH 1. Br2, hv, CCl4 2. NaOH 3. 03 4. DMS 5. LiAlH4 6. HCI, H₂O 1. mCPBA, DCM 2. MeMgBr 3. HCI, H₂O 4. PCC, DCM
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.
![1. Predict one major product.
a.
b.
ن
Et
CI
1. DBU
2. BH3 • THF
3. H₂O2, NaOH
1. Br2, hv, CCl4
2. NaOH
3. 03
4. DMS
5. LiAlH4
6. HCI, H₂O
1. mCPBA, DCM
2. MeMgBr
3. HCI, H₂O
4. PCC, DCM](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fb2e76520-e005-416e-ad38-9a53989d143d%2Fc0382b8f-5c58-4535-9e2c-70af9bc63616%2Fo2rpt8n_processed.png&w=3840&q=75)
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