Illustrated Glossary of Organic Chemistry

Tetrasubstituted: A molecule or functional group in which four hydrogen atoms have been replaced by another atom or group. These substituents are not limited to methyl groups as shown here. When considering alkene stability, only carbon substituents matter (i.e., -CH₃ or -Ph matter but -Br or -OCH₃ do not).

Benzene No substituents		Toluene A monosubstituted benzene One substituent		1,2-Dimethylbenzene A disubstituted benzene Two substituents		1,2,3-Trimethylbenzene A trisubstituted benzene Three substituents		1,2,3,4-Tetramethylbenzene A tetrasubstituted benzene Four substituents
Ethylene No substituents		Propene A monosubstituted alkene One substituent		Z-2-butene A disubstituted alkene Two substituents		2-Methyl-2-butene A trisubstituted alkene Three substituents		2,3-Dimethyl-2-butene A tetrasubstituted alkene Four substituents