Ochem ch 7 structure and synthesis of alkenes part 3 (pi bond, elements of unsaturation, heteroat

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mikepl103
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243499
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Ochem ch 7 structure and synthesis of alkenes part 3 (pi bond, elements of unsaturation, heteroat
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2013-10-28 20:40:10
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Ochem structure synthesis alkenes part pi bond elements unsaturation heteroatom alkene cis trans bredt rule E2 vicinal dibromides E1 dehydration alcohols
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Ochem ch 7 structure and synthesis of alkenes part 3 (pi bond, elements of unsaturation, heteroatom, alkene, cis-trans, E-Z, bredt's rule, E2, vicinal dibromides, E1, dehydration of alcohols)
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  1. In order to create an alkene via E2 reaction, the H and the X must be ____ to one another
    anti
  2. in an E2 reaction, ___ and ___ ___ ____ halides give good yields
    tertiary and hindered secondary
  3. in an E2 reaction,use a _____ base if the alkyl halide usually forms substitution products in order to avoid substitution
    bulky
  4. You should use a bulky base in an ___ reaction if the alkyl halide usually forms usbstitution products
    E2
  5. In an E2 reaction, a molecule that has an (S, R) conformation produces ...
    In an E2 reaction, a molecule that has an (S, R) conformation produces only a trans product
  6. In an E2 reaction, a molecule that has an (R,R) conformation produces...
    In an E2 reaction, a molecule that has an (R,R) conformation produces only cis
  7. In an E2 reaction in which a cyclohexane is the substrate, the leaving groups must be ___ ____
    trans diaxial

    Ex. 

  8. What reagent/solvent mixture must you use for an E2  reaction involving viinal dibromides?
    use NaI in cetone or Zn in acetic acid
  9. what is a vicinal dibromide?
    a vicinal dibromide is a molecule that contains two carbons that are adjacent to one another each of which are bonded to 1 bromine atom.
  10. What occurs during a vicinal dibromide E2 reaction?
    Two Br atoms are removed from adjacent carbons to form Br2

    Ex. 

  11. In order for a a vicinal dibromide E2 reaction to occur, the Bromines must be arranged how in respect to each other
    they must be arranged anti-coplanar

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