ps3 - H H Cl C + H Cl Cl H Br H Br C + H H H C + H Br False...

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31 - (31+1-2) / 2 + 1 = 17 degrees of unsat. 12 - (26 / 2) + 1 = zero degrees of unsat. OH OH OH OH Cl N N O H O H OH OH O H OH OH NH 2 Cl N H 2 O H O H OH OH O H OH O H Degrees of unsat = C-(H+X-N)/2+1 Four double bonds, one ring One triple, 3 double bonds No unsaturation! OH OH OH OH 8 - (8 / 2) + 1 = 5 degrees of unsat. 2 4 = 16 isomers
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(2E,4Z)-3-bromo-4-chloroheptadiene (2E,4Z)-3-bromo-4-chloroheptadiene (2Z,4E)-3-bromo-4-chloroheptadiene (2E,4E)-3-bromo-4-chloroheptadiene (2Z,4Z)-3-bromo-4-chloroheptadiene (2Z,4Z)-3-bromo-4-chloroheptadiene Identical Identical (Z)-3-chloropent-2-ene (Z)-3,5-dimethyl-(1,4)-heptadiene 3-propyl-1,4-cyclopentadiene
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(N) (N) (E) (E) (E) (N) (E) (N) H C + H
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Unformatted text preview: H H Cl C + H Cl Cl H Br H Br C + H H H C + H Br False True True True False False False False False False False T.S. ( G ) T.S. ( G ) Intermediate T.S. ( G ) T.S. ( G ) Intermediate E A E A G rxn G rxn a) b) Hammond Postulate: The transition state of a reaction is the assumed to be clos-est in structure to the stable species to which it is closer in energy. Therefore, the transition states for both a) and b) above would look more like the intermediates, since all transition states are closer in energy to the intermediates than the prod-ucts or starting materials, respectively....
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ps3 - H H Cl C + H Cl Cl H Br H Br C + H H H C + H Br False...

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