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Chapter 3: Q48P (page 190)

Question: Convert each Newman projection to the equivalent line-angle formula, and assign the IUPAC name.

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Step by step solution

01

IUPAC nomenclature

A systematic way of naming organic compounds based on their chemical composition and structure is given by IUPAC nomenclature.

02

Newman projection

Newman projections are often used in drawing conformations. In Newman鈥檚 projection, one views the bond end along the axis of connection.The front carbon is represented by the intersection of bonds, while the rear carbon appears as a circle.

03

 Step 3: Converting Newman projection into a line-angle formula and assigning their IUPAC names

In order to show the connectivity of carbon atoms more precisely, Newman projections are converted into a bond-line formula.

a.

b.

c.

d.

e.

f.

g.

h.

i

j

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Most popular questions from this chapter

Question: Draw a graph, similar to Figure 3-9, of the torsional strain of 2-methylpropane as it rotates about the bond between and . Show the dihedral angle and draw a Newman projection for each staggered and eclipsed conformation.

(a) Draw the two chair conformations of cis-1,3-dimethylcyclohexane, and label all the positions as axial or equatorial.

(b) Label the higher-energy conformation and the lower-energy conformation.

(c) The energy difference in these two conformations has been measured to be about23鈥塳闯鈥�(5.4鈥塳肠补濒)per mole. How much of this energy difference is due to the torsional energy of gauche relationships?

(d) How much energy is due to the additional steric strain of the1,3-diaxial interaction?

In each pair of compounds, which compound has the higher boiling point? Explain your reasoning.

(a) Nonane or 3-methylheptane

(b) Octane or 2,3,4-trimethylpentane

(c) 2,3,5-trimethylhexane or nonane

List each set of compounds in order of increasing boiling point.

(a) hexane, octane, and decane

(b) octane, (CH3)3C-C(CH3)3, and CH3CH2C(CH3)2CH2CH2CH3

Question: Using the general formula for alkanes

  1. Predict the molecular formula of theC27straight chain alkane.
  2. Predict the molecular formula of the alkanes containing 42 carbon atom with extensive branching.
See all solutions

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