CHEM 140A Lecture Notes - Lecture 8: Racemic Mixture, Reagent, Polarimeter
4 Apr 2016
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Equilibrium to the right: k > 1, Equilibrium to the left: k < 1, If you can superimpose two drawings on each other, they"re the same thing. Configuration of stereocenter : r or s (absolute configuration) R,s-nomenclature: rules in order of decreasing priority: a, b, c, d: a, b, c clockwise: r, a, b, c counterclockwise: s. ), it rapidly inverts by switching the electron pair group to the bottom (right through the carbon), then pushing the other three up. Priority rules: order by atomic number, i. e. h = 1 lowest. 2: multiple bonds: add double or triple representations of atoms at the respective. If same priority at first atom, go to first point of difference and judge other end of the multiple bond. One trick to draw enantiomer is to switch position in every bond (wedge to dash and vice versa) Diastereomers are stereoisomers that are not image-mirror-image related.
