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    (Original post by otrivine)
    is it that there should be restricted rotation of (around) the carbon -carbon double bond and that each carbon atom must be attached to four different atoms or groups of atom, also a double bond must be present. Also, there are two types of stereoisomers , E-Z (cis/trans).


    I dont think it should be hard, but you have to work hard. This is all subject to difficulty of paper.
    Yep correct. It is E/Z only if the 2 substituent groups on each carbon are the same

    And yeah hopefully the paper wont be too hard :rolleyes:
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    (Original post by otrivine)
    is it that there should be restricted rotation of (around) the carbon -carbon double bond and that each carbon atom must be attached to four different atoms or groups of atom, also a double bond must be present. Also, there are two types of stereoisomers , E-Z (cis/trans).


    I dont think it should be hard, but you have to work hard. This is all subject to difficulty of paper.
    Isn't it only 2 different atoms/groups of atom that it has to be attached to? So long as they're on different sides of the molecule...
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    (Original post by Gulzar)
    Yep correct. It is E/Z only if the 2 substituent groups on each carbon are the same

    And yeah hopefully the paper wont be too hard :rolleyes:
    yes !

    I need to brush up on F322 as well, I will also try and learn the mechanisms again from unit 2 in case they ask us again as an application type question.

    Suggest how you would distinguish between a addition and condensation reactions/polymerisation (4)
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    (Original post by Zaphod77)
    Isn't it only 2 different atoms/groups of atom that it has to be attached to? So long as they're on different sides of the molecule...
    Oh yes that is a good point dude. Sorry I missed that in your answer Otrivine
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    (Original post by Zaphod77)
    Isn't it only 2 different atoms/groups of atom that it has to be attached to? So long as they're on different sides of the molecule...
    Yes, sorry it is 2.

    you seem to want to revise with us

    Define:carbon neutral (2)
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    (Original post by otrivine)
    yes !

    I need to brush up on F322 as well, I will also try and learn the mechanisms again from unit 2 in case they ask us again as an application type question.

    Suggest how you would distinguish between a addition and condensation reactions/polymerisation (4)
    I dont know how to distinguish using a test of some sort???
    But I know the differences...
    Addition polymerisation monomers are alkenes. There is no emilination of water at all. The polymer is built from many addition reactions.

    Condenstation polymerisation does release water when the 2 monomers join. This is repeated elimination reactions. The monomers can be a diol and dicarboxylic acid OR a diamino molecule and a dicarboxylic acid...depending whether u want to create a polyester OR a polypeptide
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    (Original post by Gulzar)
    I dont know how to distinguish using a test of some sort???
    But I know the differences...
    Addition polymerisation monomers are alkenes. There is no emilination of water at all. The polymer is built from many addition reactions.

    Condenstation polymerisation does release water when the 2 monomers join. This is repeated elimination reactions. The monomers can be a diol and dicarboxylic acid OR a diamino molecule and a dicarboxylic acid...depending whether u want to create a polyester OR a polypeptide
    exactly, right and could mention that if two compounds or one compound displays one or more functional groups then the type of polymerisation is condensation

    my turn
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    (Original post by otrivine)
    Yes, sorry it is 2.

    you seem to want to revise with us

    Define:carbon neutral (2)
    Sorry, I was just reading through because I do need to start my revision too! I've only learnt modules 1 and 3 so far though...

    Carbon neutral... Not much good at definitions if I'm honest and I can't find it in the book, but is it just something that uses up as much Carbon Dioxide as it gives out?
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    (Original post by otrivine)
    exactly, right and could mention that if two compounds or one compound displays one or more functional groups then the type of polymerisation is condensation

    my turn
    I have never revised like this...its great

    Synthesis question. I have a molecule...propanone ...I want to create propanal. State the reagents, reactants and conditions required for this route.
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    (Original post by Zaphod77)
    Sorry, I was just reading through because I do need to start my revision too! I've only learnt modules 1 and 3 so far though...

    Carbon neutral... Not much good at definitions if I'm honest and I can't find it in the book, but is it just something that uses up as much Carbon Dioxide as it gives out?
    The defintion of carbon neutral was on module 1 , its in the green boxes, but yes you are correct, its where the crop absorbs co2 as is released (same) amount of co2 when fuel is combusted.

    want to do module 1 from carboxylic acid until the amine bit at the end.
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    (Original post by Gulzar)
    I have never revised like this...its great

    Synthesis question. I have a molecule...propanone ...I want to create propanal. State the reagents, reactants and conditions required for this route.
    Yes, it makes revision less boring!


    Not covered it, I only did from carboxylic acid upto polymerisation bits? Unless, I missed out a page?so from page 32 upto 60/
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    (Original post by otrivine)
    Yes, it makes revision less boring!


    Not covered it, I only did from carboxylic acid upto polymerisation bits? Unless, I missed out a page?
    Oh sorry

    If an amino acid is placed in a pH above its isoelectric point...what will happen?
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    (Original post by otrivine)
    The defintion of carbon neutral was on module 1 , its in the green boxes, but yes you are correct, its where the crop absorbs co2 as is released (same) amount of co2 when fuel is combusted.

    want to do module 1 from carboxylic acid until the amine bit at the end.
    Sure

    How is a triglyceride formed?
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    (Original post by Gulzar)
    Oh sorry

    If an amino acid is placed in a pH above its isoelectric point...what will happen?
    No worries, tomorrow I will get chapter 1 done , so we can revise everything fully. cause once I finished those two chapters everything by tomorrow , I only then have proton NMR and carbon environments to study


    Your question is not correctly phrased, it should be if the amino acid is either more acidic or alkaline e.t.c ? you have to state if the amino acid is more acidic or higher PH than isoelectric point.
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    (Original post by Zaphod77)
    Sure

    How is a triglyceride formed?



    Is formed when a glycerol (propane-1,2,3-triol) reacts with 3 fatty acids to form triglyceride and underoges condesation reaction so water molecule is removed to form triglyceride and reaction is reversible.
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    (Original post by Zaphod77)
    Sure

    How is a triglyceride formed?
    Esterification of three fatty acids joining onto the alcohol groups of glycerol.
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    (Original post by otrivine)
    No worries, tomorrow I will get chapter 1 done , so we can revise everything fully. cause once I finished those two chapters everything by tomorrow , I only then have proton NMR and carbon environments to study


    Your question is not correctly phrased, it should be if the amino acid is either more acidic or alkaline e.t.c ? you have to state if the amino acid is more acidic or higher PH than isoelectric point.
    Oh ok...if it is placed in a pH more acidic than the isolectric point...what will be the result then?
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    (Original post by otrivine)


    Is formed when a glycerol (propane-1,2,3-triol) reacts with 3 fatty acids to form triglyceride and underoges condesation reaction so water molecule is removed to form triglyceride and reaction is reversible.
    Can you call it condensation?

    Edit: Yes
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    (Original post by Gulzar)
    Oh ok...if it is placed in a pH more acidic than the isolectric point...what will be the result then?
    yes, do you get why I said that


    The overall charge would become positive because the amino acid acts as a base and accepts a proton from the carboxyl group and so will form NH3+ and COO-
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    (Original post by otrivine)


    Is formed when a glycerol (propane-1,2,3-triol) reacts with 3 fatty acids to form triglyceride and underoges condesation reaction so water molecule is removed to form triglyceride and reaction is reversible.
    Yep! Perfect answer
 
 
 
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