different arrangement of carbon and hydrogen atoms
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Examples
1-butene has the molecular formula C4H8.
All possible structural isomers of 1-butene must have the molecular formula C4H8.
name
structural formula
molecular formula
1-butene
H |
H |
H |
C
=
C
-
C
-
C
-H
| H
| H
| H
| H
C4H8
2-butene
H |
H |
H-
C
-
C
=
C
-
C
-H
| H
| H
| H
| H
C4H8
2-methylpropene
H |
H |
C
=
C
-
C
-H
| H
| H-C-H
| H
| H
C4H8
cyclobutane
H |
H |
H-
C
-
C
-H
|
|
H-
C
-
C
-H
| H
| H
C4H8
1-butene, 2-butene, 2-methylpropene and cyclobutane are structural isomers.
They have the same molecular formula, C4H8, but different structural formulae.
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