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Unformatted text preview: How to rotate and fip molecules Introduction: When fnding the relationship between two molecules, one oF the most diFfcult decisions is whether two molecules are the same or diFFerent. OFten the two molecules will be shown in diFFerent orientations. ThereFore, to compare the two molecules, it is helpFul to change the orientation oF one oF the molecules by rotating it and/or ipping it. You can do this by making a model, but it is Faster to learn how do this without making a model. How to: More examples: K. Shimizu CH 3 OH NH 2 OH When rotating the molecule in the plane oF the page, the up and down groups should remain the same. or example, the OH group points up and will stay pointing up aFter rotation. rotate 180 NH 2 OH H 3 C HO rotate -120 Hint: You can rotate the paper to check that the two molecules that you have drawn are the same. Make sure the the position (leFt and right) oF the groups did not get switched....
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- Spring '09