ho3 - TA: Winnie Chan Section: Friday, 12:00pm-12:50pm WLH...

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Chirality Chiral molecule: a molecule that is not superimposable on its mirror image. That is the only criterion! The other techniques we use (four diFerent substituents, plane of symmetry) are just used to help us decide chirality. Note that chiral molecules cannot have a plane of symmetry. Meso compound: a compound that contains two or more stereocenters but is superimposable with its mirror image. These have a internal mirror plane. It is ACHIRAL, and is not optically active. CHEM140A Handout #3
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Unformatted text preview: TA: Winnie Chan Section: Friday, 12:00pm-12:50pm WLH 2112 w8chan@ucsd.edu OH: Fridays 1:00pm-1:50pm @ Cafe Roma F H Cl H Chiral or Achiral? Br Br Br ***Achiral because two substituents of each of the carbons in question are identical! Achiral, MESO. Even though two of the carbons here have chiral centers, there is a plane of symmetry. Even if you were to draw a mirror image, it would be superimposable. Br Br Br Br Br Br rotate and get the same as the original!...
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This note was uploaded on 01/25/2010 for the course CHEM chem 140A taught by Professor Dr.yang during the Spring '07 term at UCSD.

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