Answer
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Hint:
Allylic halides are compounds containing halogen atoms bonded to \[s{p^3}\] hybridized C-atom next to carbon carbon double bond. Vinylic halides are compounds containing halogen atom bonded to \[s{p^2}\] hybridized C-atom of an aliphatic compound
Benzylic halides are compounds containing halogen atoms bonded to \[s{p^3}\] hybridized C-atoms next to aromatic rings.
Complete step by step answer:
At 19.
As Cl is attach to \[s{p^2}\] hybridized C-atom of aliphatic compound so the name is vinyl chloride and the common name is chloroethene
In 20.
As we can see the Chlorine attached to ${\text{s}}{{\text{p}}^{\text{3}}}$ dized C-atom of an aliphatic compound, so name is allyl chloride and the common name is 3-chloroprop-1-ene.
In 21.
As Cl is attached to \[s{p^3}\] hybridized C-atom next to aromatic ring, so the name is benzyl chloride and the common name is α-chlorotoluene.
In 24.
As Iodine is attached to \[s{p^3}\] hybridized C-atom next to the aromatic ring, so the name is benzyl iodide and the common name is α-iodotoluene.
In25.
As iodine is directly attached to $sp^2$ hybridized C-atom of benzene ring. As iodine is directly attached to benzene so the name is iodobenzene and the common name is phenyl iodide.
At 26.
As Chlorine is directly attached to $sp^2$ hybridized C-atom of benzene ring. As chlorine is directly attached to benzene so the name is chlorobenzene and the common name is phenyl chloride.
In 28.
Here, the double bond is between C1 and C2 so it is an alkene. The name is 2-Butene.
At 29.
Here C2 and C3 are benzylic carbon and C1 is connected to both benzylic carbons.
In 30.
Additional information:
Allylic and benzylic compounds are more stable than vinylic compounds because of resonance in them which gives them stability, unlike vinylic which act as an electron withdrawing group.
Note:For naming a compound to be allylic, vinylic or benzylic it is recommended to check the hybridization of the attached carbon by which will be able to classify them properly.
Allylic halides are compounds containing halogen atoms bonded to \[s{p^3}\] hybridized C-atom next to carbon carbon double bond. Vinylic halides are compounds containing halogen atom bonded to \[s{p^2}\] hybridized C-atom of an aliphatic compound
Benzylic halides are compounds containing halogen atoms bonded to \[s{p^3}\] hybridized C-atoms next to aromatic rings.
Complete step by step answer:
At 19.
As Cl is attach to \[s{p^2}\] hybridized C-atom of aliphatic compound so the name is vinyl chloride and the common name is chloroethene
In 20.
As we can see the Chlorine attached to ${\text{s}}{{\text{p}}^{\text{3}}}$ dized C-atom of an aliphatic compound, so name is allyl chloride and the common name is 3-chloroprop-1-ene.
In 21.
As Cl is attached to \[s{p^3}\] hybridized C-atom next to aromatic ring, so the name is benzyl chloride and the common name is α-chlorotoluene.
In 24.
As Iodine is attached to \[s{p^3}\] hybridized C-atom next to the aromatic ring, so the name is benzyl iodide and the common name is α-iodotoluene.
In25.
As iodine is directly attached to $sp^2$ hybridized C-atom of benzene ring. As iodine is directly attached to benzene so the name is iodobenzene and the common name is phenyl iodide.
At 26.
As Chlorine is directly attached to $sp^2$ hybridized C-atom of benzene ring. As chlorine is directly attached to benzene so the name is chlorobenzene and the common name is phenyl chloride.
In 28.
Here, the double bond is between C1 and C2 so it is an alkene. The name is 2-Butene.
At 29.
Here C2 and C3 are benzylic carbon and C1 is connected to both benzylic carbons.
In 30.
Additional information:
Allylic and benzylic compounds are more stable than vinylic compounds because of resonance in them which gives them stability, unlike vinylic which act as an electron withdrawing group.
Note:For naming a compound to be allylic, vinylic or benzylic it is recommended to check the hybridization of the attached carbon by which will be able to classify them properly.
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