3.) Which structure is a meso compound? В. CH3 A. C. D. CH3 CH3 CH3 H--ci H--ci H--ci H--ci ci-- CH3 Ci--H H--ci Cl--H CH3 CH2CH3 CH2CH3 A. Structure A B. Structure B C. Structure C D. Structure D Keywords: chiral, achiral, meso, internal, stereogenic center, asymmetric carbon, mirror-plane, absolute configuration, symmetry Concepts: Stereoisomerism, chirality
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.
![3.) Which structure is a meso compound?
А.
B.
с.
D.
CH3
CH3
CH3
CH3
H--ci
ci-- CH3
H--ci
H--ci
H--ci
Cl--H
H--ci
Cl--H
CH3
CH2CH3
CH2CH3
A. Structure A
B. Structure B
C. Structure C
D. Structure D
Keywords: chiral, achiral, meso, internal, stereogenic center, asymmetric carbon, mirror-plane, absolute
configuration, symmetry
Concepts: Stereoisomerism, chirality](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F2b6c2e9e-a347-484d-9c96-cdd239fef4f7%2Ff51f1798-cba7-4f27-bdfa-2cbf2876a673%2Fusfsdk_processed.png&w=3840&q=75)
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