The letters that correspond to nonmetals are to be predicted. Concept introduction: Periodic table is a tubular form of elements, which is arranged by the atomic numbers. Elements with similar properties appear in the same group in periodic table. The elements in periodic table that have tendency to form anions by gaining electrons are called nonmetal. Thus, nonmetals are electronegative elements.

Question

Problem 3-42 Consider 2-methylbutane (isopentane). Sighting along the C2-C3 bond: (a) Draw a Newman projection of the most stable conformation. (b) Draw a Newman projection of the least stable conformation. Problem 3-44 Construct a qualitative potential-energy diagram for rotation about the C-C bond of 1,2-dibromoethane. Which conformation would you expect to be most stable? Label the anti and gauche conformations of 1,2- dibromoethane. Problem 3-45 Which conformation of 1,2-dibromoethane (Problem 3-44) would you expect to have the largest dipole moment? The observed dipole moment of 1,2-dibromoethane is µ = 1.0 D. What does this tell you about the actual conformation of the molecule?

Answer 1

Question

Chapter 11, Problem 87E

Interpretation Introduction

Interpretation:

The letters that correspond to nonmetals are to be predicted.

Concept introduction:

Periodic table is a tubular form of elements, which is arranged by the atomic numbers. Elements with similar properties appear in the same group in periodic table. The elements in periodic table that have tendency to form anions by gaining electrons are called nonmetal. Thus, nonmetals are electronegative elements.

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Problem 3-42 Consider 2-methylbutane (isopentane). Sighting along the C2-C3 bond: (a) Draw a Newman projection of the most stable conformation. (b) Draw a Newman projection of the least stable conformation. Problem 3-44 Construct a qualitative potential-energy diagram for rotation about the C-C bond of 1,2-dibromoethane. Which conformation would you expect to be most stable? Label the anti and gauche conformations of 1,2- dibromoethane. Problem 3-45 Which conformation of 1,2-dibromoethane (Problem 3-44) would you expect to have the largest dipole moment? The observed dipole moment of 1,2-dibromoethane is µ = 1.0 D. What does this tell you about the actual conformation of the molecule?

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