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    Stretch and Challenge.

    Deduce the molecular formula of the molecule above. [2]
    How many chiral centres does this molecule have? [2]
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    C10 H18 O8 Cl3

    9 chiral centres?
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    (Original post by thers)
    3/3



    Stretch and Challenge.

    Deduce the molecular formula of the molecule above. [2]
    How many chiral centres does this molecule have? [2]
    C10 H18 O8 Cl3




    9 chiral centres?
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    (Original post by thers)
    3/3



    Stretch and Challenge.

    Deduce the molecular formula of the molecule above. [2]
    How many chiral centres does this molecule have? [2]
    C11H16O8CL3


    9 chiral
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    (Original post by fletchdd02)
    C10 H18 O8 Cl3




    9 chiral centres?
    Spoiler:
    Show
    Close, its C12 H19 Cl3 O8 9 chiral centres is correct - well done if you got this lol
    • Study Helper
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    I'm hoping we get a large synthesis question and NMR question as these are the ones I find the most interesting
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    (Original post by fletchdd02)
    C10 H18 O8 Cl3




    9 chiral centres?

    EDIT : Accidentally quoted wrong person - meant otrivine
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    (Original post by otrivine)
    C11H16O8CL3


    9 chiral
    See spoiler above
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    (Original post by thers)
    See spoiler above
    so close!! snap!

    but where was the last carbon ? and hydrogen
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    (Original post by otrivine)
    so close!! snap!

    but where was the last carbon ? and hydrogen
    I obviously don't know which ones you counted. But be sure to look at the side chains coming off the rings.
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    (Original post by kimsiclez)
    This guy explains it really well:

    http://www.youtube.com/watch?v=k6F__pysc74

    But if you're just having trouble putting it all together maybe it's just a case of practising trial and error? Or it could be something in your technique of tackling the question which may make it difficult for you to determine a structure. After watching this guy teach it (and there's another video about combined techniques) I love doing those 10 markers, was so gutted that they didn't come up in jan!

    EDIT: I've added some worksheets that have lots of proton and carbon NMR questions for anyone who wants to practice.
    Thank you SO MUCH for this! I love doing the questions too, and im getting better now at arranging the shapes too! I really owe you one haha ive done all those questions now
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    Last one for you guys



    State the molecular formula [1]
    State the number of chiral centres [1]
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    (Original post by thers)
    Last one for you guys



    State the molecular formula [1]
    State the number of chiral centres [1]

    3 chiral centres and c10 h18 o ?
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    (Original post by thers)
    Last one for you guys



    State the molecular formula [1]
    State the number of chiral centres [1]
    C10 H20 O

    3 chiral centres?
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    does anyone have a resource that clearly explain NMR?

    i can't for the life of me figure this one out.

    Posted from TSR Mobile
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    (Original post by Mus1995)
    C10 H20 O

    3 chiral centres?
    ah i see i missed out the 2 hydrogens
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    Answer
    Spoiler:
    Show

    C10 H20 O
    3 Chiral centres
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    (Original post by thers)
    last one for you guys



    state the molecular formula [1]
    state the number of chiral centres [1]
    c10 h20 o
    3
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    (Original post by thers)
    Last one for you guys



    State the molecular formula [1]
    State the number of chiral centres [1]
    C10H18O

    3 chiral centre
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    (Original post by hevlar.kelmet)
    does anyone have a resource that clearly explain NMR?

    i can't for the life of me figure this one out.

    Posted from TSR Mobile
    I posted this a few pages back:

    Spoiler:
    Show

    (Original post by kimsiclez)
    This guy explains it really well:

    http://www.youtube.com/watch?v=k6F__pysc74

    But if you're just having trouble putting it all together maybe it's just a case of practising trial and error? Or it could be something in your technique of tackling the question which may make it difficult for you to determine a structure. After watching this guy teach it (and there's another video about combined techniques) I love doing those 10 markers, was so gutted that they didn't come up in jan!

    EDIT: I've added some worksheets that have lots of proton and carbon NMR questions for anyone who wants to practice.
 
 
 
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