5) Which sequence of reagents can be used to do the following transformation? CH2OH 2) HBr 3) Mg/diethyl ether + H A) 1) NaBH4 B) 1)HBr 2) NaBHBr C) PCC D) H C) 1) K2Cr2O7 D) 1) NaOH 2) Acetic acid 3) H2SO4 2C=0, 4) H3O+ 3) Mg/diethyl ether followed by H 30+ 4) H 38LIAIH 4 2C=0
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.
![5) Which sequence of reagents can be used to do the following transformation ?
CH₂OH
O
2) HBr 3) Mg/diethyl ether + H
A) 1) NaBH4
B) 1)HBr 2) NaBHBr C) PCC D) H
C) 1) K2Cr2O7
D) 1) NaOH 2) Acetic acid 3) H₂SO4
2C=0, 4) H3O+
3) Mg/diethyl ether followed by H
30*
38 LIAIH
4
4) H
2C=0](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F2cfaac13-2d59-4808-9a38-e4bcdc29dd14%2F1b5fddda-efa5-45e6-95b9-3587ae7ecc7a%2F4vb0b7k_processed.jpeg&w=3840&q=75)
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