Task-2. Draw Fischer's projection formulas for all possible spatial isomers of the following compounds: (3) ОН CH3 H3C-CH2-C-COOH H3C-CH2-CH-COOH H3c-ĊH–CH-CH3 ÓH NH2 NH2
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.
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Task-2. Draw Fischer's projection formulas for all possible spatial isomers of the following compounds:
CH3
OH
Нас-сH-с—соон Н,с-сн2-сн-соон н,с-сн—сн-сн,
NH2
OH
NH2
Task 3. Draw the following Fisher projections to standard form:
CH3
но
CH3
H
H2N coOH
ÓH
-H-
CN
H
MAG
W](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fe12c46e2-5fbe-4d26-8e40-06219d588572%2F8446c4c6-a800-46d8-80cf-57c4122735f2%2F8hf1tnm_processed.jpeg&w=3840&q=75)
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