The energy cost associated with the eclipsing interaction between a bromine atom and a hydrogen atom in bromoethane is needed to be calculated on basis of given information the barrier to rotation of bromoethane is 15 kJ/mol. Concept introduction: Conformations are arising due to the free rotation of C − C bond. These rotations are measured by dihedral angle ; it is the angle between two atoms attached to two different carbons of C − C rotation in Newman projection. The most and least energy occupied conformers are eclipsed and staggered , which are having a dihedral angle of ‘0’ and ‘60’ degree respectively. The torsional strain and steric interaction between atoms of eclipsed conformations makes them more energized as compared to staggered conformations. The C − C bond rotation from staggered to eclipsed is called barrier to rotation. It requires some cost of energy . It depends upon eclipsed interaction energies of each atom attached to C − C carbon atom. The energy cost for H/H eclipsed interaction is 4 kJ/mol. To find: the energy cost associated with the eclipsing interaction between a bromine atom and a hydrogen atom in bromoethane.

Question

Want to see the full answer?

Answer 1

Question

Chapter 4, Problem 49PP

Interpretation Introduction

Interpretation:

The energy cost associated with the eclipsing interaction between a bromine atom and a hydrogen atom in bromoethane is needed to be calculated on basis of given information the barrier to rotation of bromoethane is 15 kJ/mol.

Concept introduction:

Conformations are arising due to the free rotation of C−C bond. These rotations are measured by dihedral angle; it is the angle between two atoms attached to two different carbons of C−C rotation in Newman projection.

The most and least energy occupied conformers are eclipsed and staggered, which are having a dihedral angle of ‘0’ and ‘60’ degree respectively.

The torsional strain and steric interaction between atoms of eclipsed conformations makes them more energized as compared to staggered conformations.

The C−C bond rotation from staggered to eclipsed is called barrier to rotation. It requires some cost of energy. It depends upon eclipsed interaction energies of each atom attached to C−C carbon atom.

The energy cost for H/H eclipsed interaction is 4 kJ/mol.

To find: the energy cost associated with the eclipsing interaction between a bromine atom and a hydrogen atom in bromoethane.

Expert Solution & Answer

Want to see the full answer?

Check out a sample textbook solution

See solution

Students have asked these similar questions

Rank each of the following substituted benzene molecules in order of which will react fastest (1) to slowest (4) by electrophilic aromatic substitution. Explanation Check CF3 (Choose one) OH (Choose one) H (Choose one) (Choose one) © 2025 McGraw Hill LLC. All Rights Reserved. Terms of Use | Privacy

Identifying electron-donating and electron-withdrawing effects 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 Resonance Effects Overall Electron-Density CF3 O donating O donating O electron-rich O withdrawing withdrawing O no inductive effects O no resonance effects O electron-deficient O similar to benzene OCH3 Explanation Check O donating O donating ○ withdrawing withdrawing O no inductive effects no resonance effects electron-rich electron-deficient O similar to benzene Х © 2025 McGraw Hill LLC. All Rights Reserved. Terms of Use | Privacy Center

The acid-base chemistry of both EDTA and EBT are important to ensuring that the reactions proceed as desired, thus the pH is controlled using a buffer. What percent of the EBT indicator will be in the desired HIn2- state at pH = 10.5. pKa1 = 6.2 and pKa2 = 11.6 of EBT