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Chapter 4: Q.60. (page 128)

Question: Classify each pair of compounds as constitutional isomers or identical molecules.

a.

b.

Short Answer

Expert verified

Answer

  1. The given compounds are identical.
  2. The given compounds are constitutional isomers.

Step by step solution

01

Constitutional isomers

Constitutional isomers have the same number of atoms of each element but differ in the connectivities of those atoms.

For example, 1-butene and 2-butene have the same molecular formula C4H8but are completely different in terms of the bonding of atoms.

Constitutional isomers

02

Identical molecules

Identical molecules have the same molecular formula, sequence, connectivities, and arrangement of atoms in space.

03

Re-draw the structures

Re-draw the given structures along with the bonds from the given Newman structures. Check for isomerism.

04

Isomerism in the given compounds

a. Re-drawing the structure from the given Newman projections, you get:


Re-drawn structures

Since the IUPAC names of the two structures are the same, the two compounds are identical.

b. Re-drawing the skeletal structure from the given Newman projections, you get:

Re-drawn structures

Since the given compounds are different in bonding, the compounds are constitutional isomers.

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Most popular questions from this chapter

Question: For each compound drawn below:

a. Label each OH, Br, andCH3group as axial or equatorial.

b. Classify each conformation as cis or trans.

c. Translate each structure into a representation with a hexagon for the six-membered ring, and wedges and dashed wedges for groups above and below the ring.

d. Draw the second possible chair conformation for each compound.

Question: Draw the five constitutional isomers having molecular formula C6H14.

Question: Give the structure and IUPAC name for each of the nine isomers having molecular formula C9H20that contains seven carbons in the longest chain and two methyl groups as substituents.

Question:Give IUPAC name of each compound.

a. (CH3)3-CH2-CH-(CH2CH3)2

b.

c.CH3(CH2)3CH(CH2CH2CH3)CH(CH3)2

d.

Question: Give the IUPAC name for each compound.
See all solutions

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