Question

What would be the enantiomers and diastereoisomers of C6H12?

Answer 1

There are nine stereoisomers of `"C"_6"H"_12`.

Explanation:

An alkene would have the formula `"C"_6"H"_14`, so the isomers must be alkenes or cycloalkanes.

Here are the possibilities.

(`R`)- and (`S`)-3-Methylpent-1-ene

These are a pair of enantiomers.

(`1R, 2S`)-, (`1R, 2R`)-, and (`1S, 2S`)-1,2-Dimethylcyclobutane

(`1R, 2S`)-1,2-Dimethylcyclobutane is a meso compound, because it has an internal plane of symmetry.

(`1R, 2R`)-, and (`1S, 2S`)-1,2-Dimethylcyclobutane are a pair of enantiomers.

Each is a diastereomer of the meso compound.

The four stereoisomers of 1-ethyl-2-methylcyclopropane

`"A"` and `"B"` are a pair of enantiomers, as are `"C"` and `"D"`.

The diastereomeric pairs are `"A and C, A and D, B and C, B and D"`.