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.
![What is the specific relationship between each of the following pairs of molecules? Label as
either: same, constitutional isomers, enantiomers, diastereomers, conformers, or different
соmpounds.
a)
b)
Br
Br
LCH3 H3C
H.
CH, H,C
"CH3
CI
H.
H
c)
CI
ОН
d)
Br
CH3
"CH3
OH
CI
Br
e) CH3
CH3
f) Br
OCH3
H.
OCH3
Br
g)
h)
H
CH3
НО
CI
CI
HO
Но
CH3
CH3
CH3
H
i)
CO,H
CO,H
j)
CO,H
CO,H
H-
-ОН
Но
-H
H-
OH
OH
НО
H-
OH
H-
OH
но
-H
OH
Но
H
ОН
H
CO2H
CO,H
CH,OH
CH,OH](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F408732c2-67aa-456b-a4f7-83bd2d9f642d%2F15c9a1e2-3cd5-45da-a594-c94add855e25%2F6e7f7w8_processed.jpeg&w=3840&q=75)
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