When 3-pentanone and ethanol are reacted in an acetal formation reaction in the presence of acid catalyst, the resulting FINAL acetal product has _____ bonded to the four different sides of the central carbon. [NOTE: The numbers in the responses should be subscripted.] [Exam question & (if applicable) response options © 2021 James Y. Chen. All rights reserved.] O -CH2CH3, -CH2CH3, -OCH2CH3, and -OCH2CH3 O -CH2CH3, -CH2CH3, -OCH2CH3, and -OH O -H, -CH2CH3, -OCH2CH3, and -OCH2CH3 O -(CH2)4CH3, -(CH2)4CH3, -OCH2CH3, and -OCH2CH3 O -CH2CH3, -CH2CH3, -OCH2CH2CH3, and -OCH2CH2CH3
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.
![When 3-pentanone and ethanol are reacted in an acetal formation reaction in the
presence of acid catalyst, the resulting FINAL acetal product has
the four different sides of the central carbon. [NOTE: The numbers in the responses
bonded to
should be subscripted.]
[Exam question & (if applicable) response options © 2021 James Y. Chen. All rights reserved.]
-СH2CH3, -СН2СНЗ, -ОСН2СНЗ, and -OCH2CНЗ
-СH2CH3, -СН2СHЗ, -ОСН2СНЗ, and -OH
-Н, -СН2СH3, -ОСН2CH3, and -ОCH2CH3
-(CH2)4CH3, -(CH2)4CH3, -OCH2CH3, and -OCH2CH3
-СН2CH3, -СН2СНЗ, -ОСН2СH2CH3, and -OСН2СH2CH3](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fe92374fc-1b30-4ce3-81a2-318e4d6b8e2a%2F986e08f8-972c-44dd-bc67-ec3941bf6b98%2Frkbwofl_processed.png&w=3840&q=75)
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