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.
![Suggest readily available starting materials and reaction conditions suitable for
obtaining each of the following compounds by a procedure involving alkylation of
nucleophilic carbon.
(a) PHCH2CH2CHPH
(b) (CH3)½C=CHCH2CH2CCH2CO;CH3
ČN
(c)
(d) CH2=CHCH=CHCH2CH2CO,H
CH3
CH2CO2H
CH3
CH3CO
CH;CH2CH2
(f)
(e) 2,3-diphenylpropanoic acid
(g)
CH3Oʻ
CH3CH2 CH2CH=CH2](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F7a43497b-d6f7-4276-9dbf-8fa50fc23c2b%2F1ad22c9f-8406-4bbd-a5f2-31f208dae280%2F9mq8t65_processed.png&w=3840&q=75)
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