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Predicting the products of organic reaction Watch

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    I couldnt find anything on the internet and I was wondering if someoneon could please help me this work is due on thursday.

    Alcohol reaction:
    CH3CH2OH + K2Cr207 =?

    Alkene reaction:
    H2C=CH2 + HBr =?

    Alcohol reaction:
    CH3CH3CHOH + K2CR2O7 = ?
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    (Original post by saba_09)
    I couldnt find anything on the internet and I was wondering if someoneon could please help me this work is due on thursday.

    Alcohol reaction:
    CH3CH2OH + K2Cr207 =?

    Alkene reaction:
    H2C=CH2 + HBr =?

    Alcohol reaction:
    CH3CH3CHOH + K2CR2O7 = ?
    First one is oxidation of primary alcohol. There are 2 possible products, depending on reaction conditions:
    -Partial oxidation (under distil conditions) would give the aldehyde CH3CHO
    And the rxn for this is CH3CH2OH + [O] ===> CH3CHO + H2O
    -Complete oxidation (under reflux) gives carboxylic acid (CH3COOH) and water- do the rxn in the same was and balance any oxygens if you need to.

    Second one is electrophilic addition:
    -product is CH3CH2Br

    Third is oxidation of a secondary alcohol:
    -secondary alcohols are oxidised to ketones so prod is CH3COCH3 (ie propanone) and water.

    If there was a question asking for the products of oxidation of a tertiary alcohol, it's a trick question- tertiary alcohols cannot be oxidised due to lack of H on the C attached to the OH.

    The key is really to first be able to distinguish between primary, secondary and tertiary alcohols. Shall I send a link that might help with these reactions and things?

    Are you in year 12? Make sure you know this sort of thing like literally off the top of your head. Always, always come up in exams and are meant to be easy marks. Goodluck
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    (Original post by Terrificmagenta)
    First one is oxidation of primary alcohol. There are 2 possible products, depending on reaction conditions:
    -Partial oxidation (under distil conditions) would give the aldehyde CH3CHO
    And the rxn for this is CH3CH2OH + [O] ===> CH3CHO + H2O
    -Complete oxidation (under reflux) gives carboxylic acid (CH3COOH) and water- do the rxn in the same was and balance any oxygens if you need to.

    Second one is electrophilic addition:
    -product is CH3CH2Br

    Third is oxidation of a secondary alcohol:
    -secondary alcohols are oxidised to ketones so prod is CH3COCH3 (ie propanone) and water.

    If there was a question asking for the products of oxidation of a tertiary alcohol, it's a trick question- tertiary alcohols cannot be oxidised due to lack of H on the C attached to the OH.

    The key is really to first be able to distinguish between primary, secondary and tertiary alcohols. Shall I send a link that might help with these reactions and things?

    Are you in year 12? Make sure you know this sort of thing like literally off the top of your head. Always, always come up in exams and are meant to be easy marks. Goodluck
    Yes please could you send me the link
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    (Original post by saba_09)
    Yes please could you send me the link
    Introduction to Alcohols (primary, secondary and tertiary): http://chemguide.co.uk/organicprops/...round.html#top

    Oxidation rxns of alcohols: http://chemguide.co.uk/organicprops/...oxidation.html

    Electrophilic addition: http://chemguide.co.uk/mechanisms/eladdmenu.html
 
 
 
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