What is the difference between superposable and superimposable in stereochemistry

Question

abb0t · Answer

A superimposable mirror image would mean that the one molecule could be placed on top of its mirror image and it would be a perfect fit! 

NOTE: this also refers to the realtive position ant rotation of the molecule. Remember single bonds are flexible and can rotate about some axis. 

I dont know what superposable means, but are you referring to nonsuperimposable? Just want to clarify so that I know the best explanation to give.

anonymous · Answer

Ok thanks. I am not referring to nonsuperimposable as it would mean the exact opposite of superimposable. Although, i have this thought that for a structure to be superposable on its mirror image it would give a perfect fit when placed on top without any rotations. But if rotations need to be introduced for there to be a perfect fit such mirror images should be superimposable and no longer superposable. I have no idea if this is correct, as it is only a thought that needs clarification.

abb0t · Answer

Wait, you're referring to? Did you make a second account?