This link will carry you to Dr. W.
R. Salzman's web page at the University of Arizona, Chemistry Dept. Here
you'll find images of molecules and crystals that you can rotate by
clicking and moving your mouse cursor over the image.
You will need to download the
RasMol (freeware) animation program. Click the link for the Molecular
Viewing Information page
and follow the
instructions for Windows and
for MAC.
For some of the simple molecules you may get a black screen or what
appears to be a meaningless set of lines on a black background. Don't
despair. Simply right-click (or whichever gives menu choices) the mouse
to get a menu, click Display, then click Ball and Stick or Spacefill
models.