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Chapter 3: Q. 3-3-16 P-b (page 85)

Sight along the C2-C1 bond of 2-methylpropane (isobutane).

(b) Draw a Newman projection of the least stable conformation.

Short Answer

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(b)

Step by step solution

01

Conformers

The different categories of conformers are the eclipsed and staggered conformers.The eclipsed conformer is an unstable conformer as the bulky groups are situated nearby and experience more repulsion.

02

Newman projection of the least stable conformer

(b)The least stable conformer is the molecule having maximum repulsion between the atoms. The least stable conformer of 2-methylpropane can be given as:

Newman projection of the least stable conformer

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Most popular questions from this chapter

Consider 2-methylbutane (isopentane) sighting along C-2, C-3 bond:

  1. Draw a Newman Projection of the most stable conformer.
  2. Draw a Newman Projection of the most stable conformer.
  3. If aCH3-CH3 eclipsing interaction costs 11kJ/mol (2.5 kcal/mol) and arole="math" localid="1663392343646" CH3-CH3 gauche interaction costs 3.8kJ/mol (0.9 kcal/mol), make a quantitative plot of energy versus rotation about the C-2 C-3 bond.

Question: Sight along the C2-C3 bond of 2,3-dimethylbutane, and draw a Newman projection of the most stable conformation.

In each of the following sets, which structures represent the same compoundand which represent different compounds?

(b)

Draw the structures of the following molecules:

(c) Glycerol, C3H8O3, a substance isolated from fat and used in cosmetics;

it has an -OH group on each carbon.

Draw structures corresponding to the following IUPAC names:

(b) 3-Ethyl-4,4-dimethylheptane
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