f. trans-2-butene + CH3OH with catalytic amounts of acid H3C-CH=CH-CH3 Major Product(s) of f. Stereochemistry of the product described in f. (Circle one) а. R b. S С. Е d. Z e. a mixture of E and Z f. erythro g. threo h. a racemic (50/50) mixture of R and S i. all 4 products (a set of erythro and a set of threo) j. no stereochemistry
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.
![f.
trans-2-butene + CH3OH with catalytic amounts of acid
H3C-CH=CH-CH3
Major Product(s) of f.
Stereochemistry of the product described in f. (Circle one)
а.
b. S
С. Е
d. Z
e. a mixture of E and Z
12
f. erythro
g. threo
h.
a racemic (50/50) mixture of R and S
18
i. all 4 products (a set of erythro and a set of threo)
j. no stereochemistry](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F2f0d0a9b-e35d-4c98-82d5-f91fda9de761%2F257e045e-d6f8-47df-8840-056838086fba%2F0sq23h8_processed.jpeg&w=3840&q=75)
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