Atom or group of atoms that gives a molecule “personality.” (Molecules with that group behave alike.)
Functional Group
R-X
X = F, Cl, Br, I
Halocarbon
R-OH
Alcohol
R-O-R’
R, R’ = hydrocarbons
Ether
R-CHO
Aldehyde
R-C-R’
Ketone
=
O
R-COOH
Carboxylic Acid
RCOR’
Ester
=O
R-NH2
Amine
RCNH2
Amide
=
O
RCHCOH
Amino Acid
=
ONH2
C4H9OH
Alcohol
CH3COOH
Organic Acid
C2H5OC2H5
Ether
CH3NH2
Amine
CH3COOC2H5
Ester
C2H5Br
Halocarbon
C2H5OH
Alcohol
CH3CH2CHO
Aldehyde
C4H9CONH2
Amide
C2H5OCH3
Ether
CH3COOC3H7
Ester
CH2(NH2)COOH
Amino Acid
C2H5COCH3
Ketone
C2H5COOH
Organic Acid
C2H5NH2
Amine
CCl4
Halocarbon
HCOH
Aldehyde
CH3COCH3
Ketone
C2H5CONH2
Amide
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