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Chemistry & Chemical Reactivity

10th Edition
John C. Kotz + 3 others
ISBN: 9781337399074

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BuyFindarrow_forward

Chemistry & Chemical Reactivity

10th Edition
John C. Kotz + 3 others
ISBN: 9781337399074
Textbook Problem

In which of the following organic molecules might we expect hydrogen bonding to occur?

  1. (a) methyl acetate, CH3CO2CH3

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  1. (b) acetaldehyde (ethanal), CH3CHO

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  1. (c) acetone (2-propanone) (see Question 8)
  2. (d) benzoic acid (C6H5CO2H)

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  1. (e) acetamide (CH3CONH2 an amide formed from acetic acid and ammonia)

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  1. (f) N,N-dimethylacetamide [CH3CON(CH3)2, an amide formed from acetic acid and dimethylamine]

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Interpretation Introduction

Interpretation: The organic compounds which have hydrogen bonding have to be identified.

Concept Introduction:

Intermolecular force: The attractive force that withholds two molecules is called as intermolecular force. The influence of intermolecular forces depends on molar mass and the functional group present in the molecule.

Hydrogen bonding: The attractive force that holds two polar molecules (containing Hydrogen and highly electronegative atom, such as N, O, or F) is called as hydrogen boding. This is also called as intermolecular hydrogen bonding.

The hydrogen bonding takes place within a molecule is called as intramolecular hydrogen bonding.

Explanation

Reason for correct answers:

Hydrogen bonding is the attraction between a hydrogen atom and an electronegative atom and it can be considered as a special type of dipole-dipole interaction.

The molecules with O-H, N-H bonds can form hydrogen bonds because hydrogen is attached to an electronegative atom.

From the given molecules, benzoic acid has polar OH bond and acetamide has polar NH bond

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