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.
![Elimination reactions of cis- and trans-1-bromo-2-methylcyclohexanes with Eto in ETOH could potentially
give the two products, 1-methylcyclohexene (1) or 3-methylcyclohexene (2). Which answer (a-d) indicates
the major products for each reaction?
Br
„Br
EtO
Eto
"CH3
ELOH
`CH3
*CH
ELOH
"CH3
cis
trans
Select one:
a. 2 from the cis and 1 from the trans substrate
b. 2 both from the cis and trans substrates
c. 1 both from the cis and trans substrates
d. 1 from the cis and 2 from the trans substrate](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F8983a900-3fd3-49a1-a49e-0250a96ec761%2F7504e731-831f-4d87-9f06-c7cf23654f52%2F3s6gqvb_processed.png&w=3840&q=75)
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