Aspirin Isomer 3a

The conformation about the acid C-O bond is s-cis. The carboxy group is oriented such that the OH group is far away from the ester group; Z with regard to the Ph-COOH bond. The conformation about the ester C-O bond is s-trans.


Figure. The RHF/6-31G* optimized structure of isomer 4a of aspirin.

INSTRUCTIONS
Use [shift]-mouse button to resize the molecule.
Use [option]-mouse button to shift the molecule.
Click and hold the button while moving over the molecule to rotate manually.
Click and hold the button for other menu options, such as to start or stop the rotation.
Rotate: 45° about [X ] [Y ] [Z ]
Axes: [on ] [off ]
Bounding box: [on ] [off ]
Background: [black ] [red ] [green ] [blue ] [white ]