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==Isomerer==
Der findes 9 [[isomer]]er af '''Heptan''':
*''n''-'''Heptan''' HCH<sub>3</sub>C-CH<sub>2</sub>-CH<sub>2</sub>-CH<sub>2</sub>-CH<sub>2</sub>-CH<sub>2</sub>-CH<sub>3</sub>
*2-Methylhexan (Isoheptan) HCH<sub>3</sub>C-CH(CH<sub>3</sub>)-CH<sub>2</sub>-CH<sub>2</sub>-CH<sub>2</sub>-CH<sub>3</sub>
*3-Methylhexan HCH<sub>3</sub>C-CH<sub>2</sub>-CH(CH<sub>3</sub>)-CH<sub>2</sub>-CH<sub>2</sub>-CH<sub>3</sub>
*2,2-(di)Methylpentan (Neoheptan)H CH<sub>3</sub>C-C(CH<sub>3</sub>)<sub>2</sub>-CH<sub>2</sub>-CH<sub>2</sub>-CH<sub>3</sub>
*2,3-(di)Methylpentan HCH<sub>3</sub>C-CH(CH<sub>3</sub>)-CH(CH<sub>3</sub>)-CH<sub>2</sub>-CH<sub>3</sub>
*2,4-(di)Methylpentan HCH<sub>3</sub>C-CH(CH<sub>3</sub>)-CH<sub>2</sub>-CH(CH<sub>3</sub>)-CH<sub>3</sub>
*3,3-(di)Methylpentan HCH<sub>3</sub>C-CH<sub>2</sub>-C(CH<sub>3</sub>)<sub>2</sub>-CH<sub>2</sub>-CH<sub>3</sub>
*3-Ethylpentan HCH<sub>3</sub>C-CH<sub>2</sub>-CH(CH<sub>2</sub>CH<sub>3</sub>)-CH<sub>2</sub>-CH<sub>3</sub>
*2,2,3-(tri)Methylbutan HCH<sub>3</sub>C-C(CH<sub>3</sub>)<sub>2</sub>-CH(CH<sub>3</sub>)-CH<sub>3<sub>
{{alkaner}}
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