Drawing Enantiomers

There are a few ways to draw the enantiomer for a given chiral molecule.  You could reflect the molecule through a mirror plane or you could invert each stereocenter.

Reflect through a mirror plane

There are two common ways to reflect the molecule thorugh a mirror plane.  The mirror plane could be positoned anywhere, however it oftwen convenient to place the mirror plane along the x or the y axis.

In this example the molecule is reflected though a mirror plane along the y axis.  Compound B is the enantiomer of A.

In this example the molecule is reflected though a mirror plane along the X axis.  Again, Compound B is the enantiomer of A.

Inversion of stereocenters

Another approach is to simple invert the stereocenters configuration.  This can be done by switching any two groups on each chiral ceneter.  In, this example I switched the implied H and the OH group.

You could have switched any two groups.  For example these are also the enantiomer of compund A.  The structure on the right resulted from switching the OH for CH3, while the second structure results from switching OH with the ethy group.