hyperconjugation) to solve synthetic problems. (a) Write a detailed, electron-pushing mechanism that accounts for the formation of the organic El products. 'N' CH3 CI CH3 NaOH E1 NaOH PT (b) A lesser-known elimination mechanism is represented here. In this mechanism, the base/nucleophile performs PT in the first step, but the leaving group does not immediately leave, as evidenced by the intermediate. Write a detailed, electron-pushing mechanism to describe this pathway. How does only one (1) organic product forming here compare to the two (2) products formed by E1? CH3 CH3 CH3 CH3 CH3 + HOH + CI CH3 CH3 + HOH
Basics in Organic Reactions Mechanisms
In organic chemistry, the mechanism of an organic reaction is defined as a complete step-by-step explanation of how a reaction of organic compounds happens. A completely detailed mechanism would relate the first structure of the reactants with the last structure of the products and would represent changes in structure and energy all through the reaction step.
Heterolytic Bond Breaking
Heterolytic bond breaking is also known as heterolysis or heterolytic fission or ionic fission. It is defined as breaking of a covalent bond between two different atoms in which one atom gains both of the shared pair of electrons. The atom that gains both electrons is more electronegative than the other atom in covalent bond. The energy needed for heterolytic fission is called as heterolytic bond dissociation energy.
Polar Aprotic Solvent
Solvents that are chemically polar in nature and are not capable of hydrogen bonding (implying that a hydrogen atom directly linked with an electronegative atom is not found) are referred to as polar aprotic solvents. Some commonly used polar aprotic solvents are acetone, DMF, acetonitrile, DMSO, etc.
Oxygen Nucleophiles
Oxygen being an electron rich species with a lone pair electron, can act as a good nucleophile. Typically, oxygen nucleophiles can be found in these compounds- water, hydroxides and alcohols.
Carbon Nucleophiles
We are aware that carbon belongs to group IV and hence does not possess any lone pair of electrons. Implying that neutral carbon is not a nucleophile then how is carbon going to be nucleophilic? The answer to this is that when a carbon atom is attached to a metal (can be seen in the case of organometallic compounds), the metal atom develops a partial positive charge and carbon develops a partial negative charge, hence making carbon nucleophilic.
![T
hyperconjugation) to solve synthetic problems.
(a) Write a detailed, electron-pushing mechanism that accounts for the formation of the organic El products.
S
Ⓒ
N
CH3
CI
CH3
CH3
D
CI
NaOH
E1
(b) A lesser-known elimination mechanism is represented here. In this mechanism, the base/nucleophile performs PT in the first step, but
the leaving group does not immediately leave, as evidenced by the intermediate. Write a detailed, electron-pushing mechanism to describe
this pathway. How does only one (1) organic product forming here compare to the two (2) products formed by El?
CH3
NaOH
PT
CH3
+
CH3
CH3
HOH
CI
CH3
CH3
+ HOH
O
:CI:](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F1e8abba7-6237-435b-b644-f6cc3aef3ddb%2F14c03830-aad5-4c54-83ec-7c73d89a6f26%2F4midznp_processed.jpeg&w=3840&q=75)
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