Question

Question #375f0

Answer 1

Step 1.

Start by drawing a vertical line of six carbon atoms, with `"C-1"` at the top and a cross at `"C-3"`.

Step 2. Arbitrarily put an `"H"` on the left side and a `"CH"_3` on the right.

We have a 50 % chance of getting it right.

If it's wrong, we will simply reverse the positions of the `"H"` and the `"CH"_3`.

Step 3. Assign the configuration.

This is (`S`). We got it right!