Starting from benzene and an acid chloride how to prepare diphenylmethane, (Ph) 2 CH 2 , is to be shown. Concept introduction: Friedal-Crafts acylation of benzene with an aromatic acid chloride leads to the formation of a diaryl ketone which when reduced with H 2 /Pd yields the corresponding diarylmethane. To show: Starting from benzene and acid chloride how to prepare diphenylmethane.

Question

Photochemical smog is formed in part by the action of light on nitrogen dioxide. The wavelength of radiation absorbed by NO2 in this reaction is 197 nm.(a) Draw the Lewis structure of NO2 and sketch its π molecular orbitals.(b) When 1.56 mJ of energy is absorbed by 3.0 L of air at 20 °C and 0.91 atm, all the NO2 molecules in this sample dissociate by the reaction shown. Assume that each absorbed photon leads to the dissociation (into NO and O) of one NO2 molecule. What is the proportion, in parts per million, of NO2 molecules in this sample? Assume that the sample behaves ideally.

Answer 1

Question

Chapter 16.9, Problem 21P

Interpretation Introduction

Interpretation:

Starting from benzene and an acid chloride how to prepare diphenylmethane, (Ph)₂CH₂, is to be shown.

Concept introduction:

Friedal-Crafts acylation of benzene with an aromatic acid chloride leads to the formation of a diaryl ketone which when reduced with H₂/Pd yields the corresponding diarylmethane.

To show:

Starting from benzene and acid chloride how to prepare diphenylmethane.

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Photochemical smog is formed in part by the action of light on nitrogen dioxide. The wavelength of radiation absorbed by NO2 in this reaction is 197 nm.(a) Draw the Lewis structure of NO2 and sketch its π molecular orbitals.(b) When 1.56 mJ of energy is absorbed by 3.0 L of air at 20 °C and 0.91 atm, all the NO2 molecules in this sample dissociate by the reaction shown. Assume that each absorbed photon leads to the dissociation (into NO and O) of one NO2 molecule. What is the proportion, in parts per million, of NO2 molecules in this sample? Assume that the sample behaves ideally.

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