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anonymous

  • one year ago

Help me with two questions in the attachment please :)

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  1. anonymous
    • one year ago
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  2. aaronq
    • one year ago
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    what part is giving you problems?

  3. anonymous
    • one year ago
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    I cannot figure out how B is correct because wouldn't only Br be replaced with CN ? And after nitril hydrolysis CN changes to CO2H to give carboxylic acid i'm talking about 28

  4. aaronq
    • one year ago
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    in fact, CH2Br would be replaced with CO2H

  5. anonymous
    • one year ago
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    What how? Can you write equation for it plzzzz?

  6. anonymous
    • one year ago
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    I figured out question 29.

  7. aaronq
    • one year ago
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    Sorry i had a phone call. Look at the mechanism i attached

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  8. anonymous
    • one year ago
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    28 ans is B?

  9. anonymous
    • one year ago
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    This is so confusing :/ what i learned was the reaction between KCN and halogenoalkane and its a nucleophilic reaction halogen is replaced with CN and nitril is hyrolysed so CN gets replaced with CO2H

  10. anonymous
    • one year ago
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    Yeah @HamidAliAbbasi but do you know the reaction?

  11. aaronq
    • one year ago
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    "CN gets replaced with CO2H " this is right

  12. aaronq
    • one year ago
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    sorry, i think im contradicting myself and maybe was wrong initially

  13. aaronq
    • one year ago
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    yeah B is right

  14. anonymous
    • one year ago
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    I just checked the markscheme to confirm it's written there B is the correct answer for 28

  15. anonymous
    • one year ago
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    Oh yeah yeah

  16. anonymous
    • one year ago
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    But how B is correct that's the problem

  17. aaronq
    • one year ago
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    |dw:1433542641429:dw||dw:1433542712862:dw||dw:1433542772571:dw|

  18. anonymous
    • one year ago
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    Oh i think i get check my drawings are they correct?

  19. anonymous
    • one year ago
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    I just got confused cuzi didn't rearrange them

  20. aaronq
    • one year ago
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    yep that's right

  21. anonymous
    • one year ago
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    Understood or should i explain?

  22. anonymous
    • one year ago
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    I understood thanks :)

  23. aaronq
    • one year ago
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    awesome

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spraguer (Moderator)
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