Archive:Introduction to Functional Groups: Difference between revisions
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==Hydroxyl Group== | ==Hydroxyl Group== | ||
[[Image:Alcohol-(general)-skeletal.png|75px|thumb|right|Hydroxyl Group]] | [[Image:Alcohol-(general)-skeletal.png|75px|thumb|right|Hydroxyl Group]] | ||
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The hydroxyl group is formed by attaching a [[oxygen]] and a [[hydrogen]] atom to a molecule. Both the bond from the molecule to the oxygen and the bond from the oxygen to the hydrogen are single bonds; thus hydroxyl groups are usually denoted R-O-H. (where O is oxygen, H is hydrogen, and R is the molecule the hydroxyl group is attached to) | The hydroxyl group is formed by attaching a [[oxygen]] and a [[hydrogen]] atom to a molecule. Both the bond from the molecule to the oxygen and the bond from the oxygen to the hydrogen are single bonds; thus hydroxyl groups are usually denoted R-O-H. (where O is oxygen, H is hydrogen, and R is the molecule the hydroxyl group is attached to) | ||
Revision as of 23:18, 13 January 2008
Introduction
Functional groups are groups of atoms within a molecule that affect its function. Some basic ones are listed below.
Hydroxyl Group
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test The hydroxyl group is formed by attaching a oxygen and a hydrogen atom to a molecule. Both the bond from the molecule to the oxygen and the bond from the oxygen to the hydrogen are single bonds; thus hydroxyl groups are usually denoted R-O-H. (where O is oxygen, H is hydrogen, and R is the molecule the hydroxyl group is attached to)
An organic compound that contains a hydroxyl group is called an alcohol.
Reactions of alcohols is covered in Section 4.2
Carbonyl Group
The Carbonyl group is formed by attaching a oxygen to a carbon by a double bond, then attaching that same carbon atom to a molecule. A carbonyl group is denoted X-C=O
Carboxyl Group
The carboxyl group is formed by starting with a carbonyl group , then attaching a hydroxyl group to the same carbon atom in the carbonyl group. Finally, the carboxyl group is added to a molecule. Because carbon has four bonding sites, and three of them are taken up by the hydrogen and oxygen, the bond from the carbon to the molecule is a single bond. A carboxyl group is denoted X-COH=O