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Quiz 7/15
Question | Answer |
---|---|
chirality centers to find stereoisomers | 2^chirality centers |
stereoisomers | molecules with identical molecular formulas and connectivity but different arrangements of bonds in space |
enantiomers | non-superimposable mirror images |
diastereomers | some S, some R (not opposite) |
enantiomers have | identical physical properties (mp, bp, solubility) |
diastereomers have | different physical properties |
optical rotation is measured using a | polarimeter |
the polarimeter | shines plane polarized light through the molecules |
the optical rotation is read by | looking through the measuring field, adjusting the field, and reading the scale |
we will measure (3) | polarity, melting point, optical rotation |
draw + menthol | dash dash thick |
draw - menthol | thick thick dash |
draw + neomenthol | think dash dash |
carboxylic acids are soluble in | diethyl ether or ethyl acetate |
R=O-OH + NaOH | R=O-O-, Na+, H2O |
R=O-O-, Na + HCl | re-protonates |
R2NH + HCl | R2NH2 + Cl- |
RNH3, Cl + NaOH | deprotonates |
Neutral was in the | organic layer |
Acidic was in the | aqueous layer |
draw benzoic acid | |
draw benzophenone | |
Rf of acid | .4 |
Rf of neutral | .6 |