How do you determine if polygon is planar?

[ramin123]

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How do you determine if a polygon is planar? --- Ex. heptagon is nonplanar, thus it is nonaromatic even if it is conjugated.

 

[ramin123]

Anyone?

 

[ramin123]

anyone?

 

[winkipink]

look at the bonded substituents on the carbon. count how many bonds it has, if it has 3 bonds, its sp2 and planar. a quick easy example,

benzene: each carbon is attached to 2 other carbons and a hydrogen. 3 bonds on each carbon, so the whole thing is planar.

cyclohexane: each carbon is attached to 2 other carbons, plus 2 other hydrogens. 4 bonds = sp3 right? sp3 is not planar, but trigonal pyrimidal at each carbon.

i hope this helps 🙂

 

[Mamona]

look at the bonded substituents on the carbon. count how many bonds it has, if it has 3 bonds, its sp2 and planar. a quick easy example,

benzene: each carbon is attached to 2 other carbons and a hydrogen. 3 bonds on each carbon, so the whole thing is planar.

cyclohexane: each carbon is attached to 2 other carbons, plus 2 other hydrogens. 4 bonds = sp3 right? sp3 is not planar, but trigonal pyrimidal at each carbon.

i hope this helps 🙂

Great it help me a lot easy way to see it!!!

 

[winkipink]

sorry i forgot to add, if at least one carbon is sp3, then the whole thing is not planar. all carbons must be sp2, from my understanding 🙂