
Concept explainers
(a)
Interpretation:
Structural formula of 2,5-dimethyl-3-hexane has to be drawn.
Concept introduction:
IUAC gives rules for the naming of chemical compounds. These rules are,
For
In the nomenclature, Find the parent chin first then number the carbon atoms in the parent chain by giving lest number to the unsaturated double/triple bonded carbon followed by designate the substituent in its position in parent chain.
If more than one same substituent were occurs, add a prefix (di-, tri-, tetra-, ect..) in front of parent chain name.
If compound contains double bond means, name end with suffix of ene or if compound contains triple bond means name end with suffix of yne.
Finally the systematic name was written as, the substituent position number with prefix (di-, tri-, tetra-, ect..) of number of substituents followed by name of the substituent then write the parent chain name (which contains large number of carbon atoms in the chain) with suffix of suffix ene/yne.
The parent chain names based on the carbon atoms are,
The substituent names based on the carbon atoms are,
(a)

Explanation of Solution
The structural formula of 2,5-dimethyl-3-hexene is,
From the given name parent compound is 3-hexene, its structure is,
Two methyl groups are present at 2 and 5 positions so substitute methyl groups at 2 and 5 positions to get the complete structural formula of 2,5-dimethyl-3-hexene.
Hence, the complete structural formula of 2,5-dimethyl-3-hexene is,
(b)
Interpretation:
Structural formula of 2-ethyl-3-methyl-1-pentene has to be drawn.
Concept introduction:
Refer part (a).
(b)

Explanation of Solution
The structural formula of 2-ethyl-3-methyl-1-pentene is,
From the given name parent compound is 1-pentene, its structure is,
Ethyl group is present at second carbon and methyl group is present at third carbon so substitute these carbon atoms to get structural formula of 2-ethyl-3-methyl-1-pentene.
Hence, the complete structural formula of 2-ethyl-3-methyl-1-pentene is,
(c)
Interpretation:
Structural formula of 4-methyl-2-pentene has to be drawn.
Concept introduction:
Refer part (a).
(c)

Explanation of Solution
The structural formula of 4-methyl-2-pentene is,
From the given name parent compound is 4-methyl-2-pentene, its structure is,
Methyl group is present at fourth carbon so substitute methyl group at 4 carbon atom to get structural formula of 4-methyl-2-pentene.
Hence, the complete structural formula of 4-methyl-2-pentene is,
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Chapter 19 Solutions
FOUND.OF COLLEGE CHEMISTRY
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- For each of the substituted benzene molecules below, determine the inductive and resonance effects the substituent will have on the benzene ring, as well as the overall electron-density of the ring compared to unsubstituted benzene. Molecule Inductive Effects O donating O withdrawing O no inductive effects Resonance Effects Overall Electron-Density ○ donating ○ withdrawing O no resonance effects O electron-rich O electron-deficient O similar to benzene Cl O donating O withdrawing ○ donating ○ withdrawing O no inductive effects O no resonance effects O Explanation Check O electron-rich O electron-deficient similar to benzene X © 2025 McGraw Hill LLC. All Rights Reserved. Terms of Use | Privacy Center | Accessarrow_forwardIdentifying electron-donating and For each of the substituted benzene molecules below, determine the inductive and resonance effects the substituent will have on the benzene ring, as well as the overall electron-density of the ring compared to unsubstituted benzene. Molecule Inductive Effects NH2 ○ donating NO2 Explanation Check withdrawing no inductive effects Resonance Effects Overall Electron-Density ○ donating O withdrawing O no resonance effects O donating O withdrawing O donating withdrawing O no inductive effects Ono resonance effects O electron-rich electron-deficient O similar to benzene O electron-rich O electron-deficient O similar to benzene olo 18 Ar 2025 McGraw Hill LLC. All Rights Reserved. Terms of Use | Privacy Center | Accessibilityarrow_forwardRank each of the following substituted benzene molecules in order of which will react fastest (1) to slowest (4) by electrophilic aromatic substitution. Explanation Check Х (Choose one) OH (Choose one) OCH3 (Choose one) OH (Choose one) © 2025 McGraw Hill LLC. All Rights Reserved. Terms of Use | Privacy Centerarrow_forward
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