# What OH groups are axial in β-D-altropyranose? Having a lot of trouble drawing the compound in chair and boat conformation.

## It looks like none of the OH groups are in axial position and all are equatorial. I have found several different drawings of this compound and have become very confused.

Dec 26, 2016

Here's how I work it out.

#### Explanation:

The structures of D-altrose and D-Glucose are

In β-D-glucopyranose, all $\text{OH}$ groups are equatorial.
Thus, in β-d-altropyranose, the $\text{OH}$ groups on carbons 2 and 3 are axial.
The $\text{OH}$ groups on carbons 2 and 3 are axial. The others are equatorial.