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OCR A2 CHEMISTRY F324 and F325- 14th and 22nd June 2016- OFFICIAL THREAD watch

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    Someone explain this, my friend did but I didn't get it completely.

    If benzene was reacted with CH3CHClCH3 in the presence of AlCl3, identify the organic product that would be formed!

    Thanks
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    (Original post by L'Evil Wolf)
    Someone explain this, my friend did but I didn't get it completely.

    If benzene was reacted with CH3CHClCH3 in the presence of AlCl3, identify the organic product that would be formed!

    Thanks
    I believe you can think of the AlCl3 reacting with the 2-chloropropane to remove the chlorine atom from 2-chloropropane, forming AlCl4- and (CH3)2CH+, which is an electrophile and reacts with benzene in the regular electrophilic substitution mechanism.

    In reality it might be slightly more complex.
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    (Original post by EricPiphany)
    I believe you can think of the AlCl3 reacting with the 2-chloropropane to remove the chlorine atom from 2-chloropropane, forming AlCl4- and (CH3)2CH+, which is an electrophile and reacts with benzene in the regular electrophilic substitution mechanism.

    In reality it might be slightly more complex.
    Thank you sir.
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    (Original post by EricPiphany)
    I believe you can think of the AlCl3 reacting with the 2-chloropropane to remove the chlorine atom from 2-chloropropane, forming AlCl4- and (CH3)2CH+, which is an electrophile and reacts with benzene in the regular electrophilic substitution mechanism.

    In reality it might be slightly more complex.
    do you have any good notes on figuring out what the electrophile is

    Thankn you
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    (Original post by L'Evil Wolf)
    do you have any good notes on figuring out what the electrophile is

    Thankn you
    No, I don't. In general an electrophile is an electron deficient species, that can accept a lone pair of electrons forming a covalent bond.
    Attracted to high electron density.
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    (Original post by EricPiphany)
    No, I don't. In general an electrophile is an electron deficient species, that can accept a lone pair of electrons forming a covalent bond.
    Attracted to high electron density.
    Oh okay thanks
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    For the percentage yield is it in terms of moles or mass that you divide by?
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    (Original post by L'Evil Wolf)
    For the percentage yield is it in terms of moles or mass that you divide by?
    doesn't really matter as works both ways
    But the proper way is using the mass
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    (Original post by L'Evil Wolf)
    For the percentage yield is it in terms of moles or mass that you divide by?
    It's the same but I've always used moles.
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    Besides some reactions, mass spec and IR, how much of AS are we expected to remember? I'm going to read over my AS notes today
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    (Original post by Serine Soul)
    Besides some reactions, mass spec and IR, how much of AS are we expected to remember? I'm going to read over my AS notes today
    I feel like chemistry is only synoptic in the sense of empirical formula, some definitions, all the reaction mechanisms and what you've said tbh. But I'm going over everything too briefly..
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    For part ii isn't the atom economy 79 percent since there are 2 moles of h20


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    All the best to those on here doing F322 this afternoon!
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    GOOD LUCK CHAPS

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    (Original post by L'Evil Wolf)
    For part ii isn't the atom economy 79 percent since there are 2 moles of h20


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    anyone hlep wth this please
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    (Original post by L'Evil Wolf)
    anyone hlep wth this please
    Part a?

    Write down an overall equation for the reaction they've described
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    (Original post by L'Evil Wolf)
    anyone hlep wth this please
    Only 1 mole of H2O is formed.
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    (Original post by Serine Soul)
    Part a?

    Write down an overall equation for the reaction they've described
    (Original post by rory58824)
    Only 1 mole of H2O is formed.
    that explains it, annoyed to have made this error.

    COuld I just ask you, if there were 2 moles then if we were calculating the atom economy then we would mulitply the Mr by 2 right?
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    (Original post by L'Evil Wolf)
    that explains it, annoyed to have made this error.

    COuld I just ask you, if there were 2 moles then if we were calculating the atom economy then we would mulitply the Mr by 2 right?
    Just to check, what's the answer?

    And yeah you would
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    Hi guys, hope revision is going well.
    I have a question, I hope someone can help me.

    From the Jan 12 F324 paper, in Q2, they ask how we can make 4-chlorophenlyamine from benzene. So I said we can make nitrobenzene, reduce it to get phenyl amine and then just react it with Cl-2. The mark scheme says you can't react it with Cl2, rather you have to do HCL and tin (???), why is this?
 
 
 
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