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Chemistry
121, Winter 2008, LA Tech
Hydrogen Bonding
Alcohols
associate in the liquid state by hydrogen bonding
Hydrogen bonding: the attractive force between
a partial positive charge on hydrogen and a partial negative charge on
a nearby oxygen, nitrogen, or fluorine atom
•the strength of hydrogen bonding in alcohols
is approximately
2 to 5 kcal/mol
•hydrogen bonds are considerably weaker than
covalent bonds
(for example, 110 kcal/mol for an O-H bond)
•nonetheless, hydrogen bonding can have a
significant effect
on physical properties