ochem ch 6 alkyl halides part 1

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Author:
mikepl103
ID:
241852
Filename:
ochem ch 6 alkyl halides part 1
Updated:
2013-10-28 20:28:28
Tags:
halide halogenation SN2 SN1 nucleophile hydride shift saytzeff rule e1 e2 substitution elimination
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Description:
halide halogenation, SN2, SN1, nucleophile, hydride shift, saytzeff's rule, e1, e2, substitution, elimination
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  1. What two types of reactions do alkyl halides undergo?
    substitution and elimination reactions
  2. What does SN2 stand for?
    • S- substitution
    • N- nucleophile
    • 2-bimolecular
  3. what does it mean if a reaction is bimolecular?
    two chemical species lead to the transition state
  4. R-X order of reactivity for SN2 reactions
    CH3X>1°>2°>>>3°
  5. What are the three good leaving groups?
    Cl (with 8 electrons), Br (w. 8 el.), I (w. 8 el.)
  6. strong nucleophiles in SN2 reaction usually have a what property?
    have a negative charge
  7. formation of carbocation is always the _____ step in a reaction
    slow
  8. substitution reaction
    the halogen atom on the alkyl halide is replaced with another group. Since the halogen is more electronegative than carbon, the C-X bond breaks heterolytically and X- leaves. The group replacing X- is a nucleophile.

  9. Elimination reaction
    the alkyl halide loses halogen as a halide ion, and also loses H+ on the adjacent carbon to a base. A pi bond is formed. The product is an alkene. This reaction is also called dehydrohalogenation (-HX).

    • ex. 
  10. what is a concerted reaction?
    a reaction in which everything happens in one step

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