Jonas Bostrom who spoke at the Chemistry on Mobile Devices Meeting just sent me a link to EduChem VR - WebVR highlighting the use of virtual reality in chemistry.

"Chemistry WebVR" is web-based platform to learn about organic chemistry. You can experience important concepts like stereochemistry, molecular geometries, atom orbitals or reactions mechanisms in a virtual reality. It is userfriendly and works direct in your smartphone browser. The target is University courses and advanced high-school levels.

There is a demo of a SN2 reaction here and if you explore you will see a link to sign up as a beta tester.