Chemistry: Atoms First (2nd Edition)

Published by Cengage Learning
ISBN 10: 1305079248
ISBN 13: 978-1-30507-924-3

Chapter 21 - Questions - Page 881a: 6

Answer

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Work Step by Step

In alcohol, $-OH$ group is present. So, here O is bonded with H. That's why polarity of H is increased because of more electronegative 'O' so that it can make H-bond with the same molecule i.e. intermolecular H bond. Similarly, for Carboxylic acid ($-COOH$) and amine ($-NH_{2}$), H is bonded with O and N respectively. So, they will also participate in intermolecular H bonding. An example is illustrated below. Alcohols, Carboxylic acids and amines groups can exhibit hydrogen bonding intermolecular forces. $CH_{2}CF_{2}$ does not exhibit hydrogen bonding because: for H bonding to occur, 'H' must be attached to more electronegative atoms (N or O or F). Here in this molecule 'H" is attached to 'C' but not with 'F'. So, the 'H' is not that polarized to make intermolecular H bond with F. Structure of $CH_{2}CF_{2}$ is as follows:
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