How many different carbocations will form from an SN1 ionization mechanism on the molecule below. Include all possible resonance forms even if a minor contributor. Br 1 4 O00
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.
![How many different carbocations will form from an SN 1 ionization mechanism on the molecule below. Include all possible resonance forms even if a minor contributor.
Br
1
23
4](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F5ac25185-7238-4604-b162-ca51652c6662%2F0d351c8b-f253-4fb6-90e4-839765ec3ff9%2Frd4xfw_processed.png&w=3840&q=75)
![An allylic free radical halogenation occurs to give the major product shown. Note NBS is a source of bromine radicals. The first step of the mechanism is shown which forms
an allylic radical.
Draw the resonance arrows that interconverts the two allylic radicals.
H₂C
H
NBS
peroxides
H3C.
Br
+ enantiomer
H3C.
Draw resonance arrows
Br
H₂C
H
H3C.
HBr +](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F5ac25185-7238-4604-b162-ca51652c6662%2F0d351c8b-f253-4fb6-90e4-839765ec3ff9%2F1g8jx5q_processed.png&w=3840&q=75)
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