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AQA CHEM4 - 13th June 2012

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    very confused about organic names!
    so propanamide can't be written as propanEamide
    and aminobutan-1,4-dioic acid is wrong!!! I need to put the "e" in butane and write aminobutane-1,4-dioic acid.......why???
    I cant get rid of these minor naming mistakes? Any help as to when to put the E and when not to!
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    (Original post by 768mango)
    very confused about organic names!
    so propanamide can't be written as propanEamide
    and aminobutan-1,4-dioic acid is wrong!!! I need to put the "e" in butane and write aminobutane-1,4-dioic acid.......why???
    I cant get rid of these minor naming mistakes? Any help as to when to put the E and when not to!
    It's so pedantic. Also when do you use phenyl and when do you use benzene?
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    (Original post by rss.914)
    in the cgp book it says to get from haloalkane to alkene you use naoh/ethanol under reflux so its elimination....
    Be a little wary of CGP their books at level are NOT the best. If multiple books don't +mention reflux - you're safe to give It a miss
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    Could someone pls name what 1 and 2 are. I think 1 is alkyl benzene, is that right? And what's 2?
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    (Original post by popnit)
    Could someone pls name what 1 and 2 are. I think 1 is alkyl benzene, is that right? And what's 2?
    isn't the one an alcohol?

    This was posted from The Student Room's Android App on my GT-S5830
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    (Original post by popnit)
    Could someone pls name what 1 and 2 are. I think 1 is alkyl benzene, is that right? And what's 2?
    I believe 1 is phenyl-ethanone since it's a ketone. And 2 is phenyl-ethan-2-ol I think! Can anyone confirm?

    This was posted from The Student Room's Android App on my GT-I9100
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    (Original post by loz876)
    I believe 1 is phenyl-ethanone since it's a ketone. And 2 is phenyl-ethan-2-ol I think! Can anyone confirm?

    This was posted from The Student Room's Android App on my GT-I9100
    Sounds right, although the -2- are not really needed, since there is -where else the OH bonds can go!
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    Got to learn all the organic synthesis things today....
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    Sorry for the double post but what's the mechanism for getting a secondary amine from a primary one?

    I know you add excess conc. ammonia under pressure (2 moles) to get from a haloalkane to a primary amine but then I'm confused.

    Does the lone pair on the N attracting a C from another haloalkane?
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    (Original post by excell)
    Sorry for the double post but what's the mechanism for getting a secondary amine from a primary one?

    I know you add excess conc. ammonia under pressure (2 moles) to get from a haloalkane to a primary amine but then I'm confused.

    Does the lone pair on the N attracting a C from another haloalkane?
    Yeah nuc substitution occurs. Lone pair on N to the +ve C atom on the haloalkane
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    Can anyone please explain to me question 9b from 2010 jan?
    I don't understand the mark scheme and why did they put CH3CN ??
    Can't they make CH3Cl from this ?
    CH3CH2NH2+ HCL---->CH3CL + CH3NH2
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    (Original post by Whatever9999)
    Can anyone please explain to me question 9b from 2010 jan?
    I don't understand the mark scheme and why did they put CH3CN ??
    Can't they make CH3Cl from this ?
    CH3CH2NH2+ HCL---->CH3CL + CH3NH2
    This question is all about knowing your aliphatic synthetic routes.
    they want to make a CH3CH2NH2 molecule which is a primary amine and they start with methane which is an alkane, there are two way to do this one by going from an alkane straight to a primary amine using NH3/ethanol in refulux but that only one step they want a three step synthesis which is:

    step 1 you are going from an alkane to a chloroalkane and this happens using Cl2in UV light

    step 2 you are going chloroalkane to a nitrile using HCN(aq) in alcohol using reflux

    step 3 you are going from a nitrile to a primary amine using Na/ethanol in reflux

    its really just knowing your synthetic routes really well hope this helped
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    (Original post by Baraa3)
    This question is all about knowing your aliphatic synthetic routes.
    they want to make a CH3CH2NH2 molecule which is a primary amine and they start with methane which is an alkane, there are two way to do this one by going from an alkane straight to a primary amine using NH3/ethanol in refulux but that only one step they want a three step synthesis which is:

    step 1 you are going from an alkane to a chloroalkane and this happens using Cl2in UV light

    step 2 you are going chloroalkane to a nitrile using HCN(aq) in alcohol using reflux

    step 3 you are going from a nitrile to a primary amine using Na/ethanol in reflux

    its really just knowing your synthetic routes really well hope this helped
    The only mechanism we NEED to know going from Alkane ---> haloalkane is UV light and Cl2 others are not required to know
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    (Original post by Doctor.)
    The only mechanism we NEED to know going from Alkane ---> haloalkane is UV light and Cl2 others are not required to know
    yes thats right thats the only mechanism required to know for an alkane reaction
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    (Original post by Baraa3)
    This question is all about knowing your aliphatic synthetic routes.
    they want to make a CH3CH2NH2 molecule which is a primary amine and they start with methane which is an alkane, there are two way to do this one by going from an alkane straight to a primary amine using NH3/ethanol in refulux but that only one step they want a three step synthesis which is:

    step 1 you are going from an alkane to a chloroalkane and this happens using Cl2in UV light

    step 2 you are going chloroalkane to a nitrile using HCN(aq) in alcohol using reflux

    step 3 you are going from a nitrile to a primary amine using Na/ethanol in reflux

    its really just knowing your synthetic routes really well hope this helped

    Shokrun 3iraqiaa ??

    Will go over them ,its the organic synthesis chapter right??
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    Do you think there is any chance that the grade boundaries will be low? It seems like the boundaries for January 2012 were quite high..though I guess that means this will be a harder paper
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    (Original post by Whatever9999)
    Shokrun 3iraqiaa ??

    Will go over them ,its the organic synthesis chapter right??
    The organic synthesis bit in the nelson thornes book is not that good so if you have it, use the CGPrevision guide
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    (Original post by Whatever9999)
    Shokrun 3iraqiaa ??

    Will go over them ,its the organic synthesis chapter right??
    walaayhimich yh its chapter 10
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    can someone help me on question 1e on the june 10 paper..

    http://store.aqa.org.uk/qual/gce/pdf...W-QP-JUN10.PDF
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    this is what i use to learn aliphatic and aromatic synthetic routes, just bear in mind that this is for all exam boards, so in the picture of aliphatic we dont need to know diol and dibromoalkane, ketone is not on here because its reactions are similar to aldehyde. for aromatic we only need to know 4 reactions, nitration, alkylation, acylation and reduction not diazotisation, chlorination or azo-coupling. hope this helps

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