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الموضوع: Structural Isomerism

  1. #1
    عضو ذهبي الصورة الرمزية تسنيم
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    Jul 2011
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    افتراضي Structural Isomerism

    Structural Isomerism

    structural isomerism occurs when two or more organic compounds have the same molecular formulae, but different structures. These differences tend to give the molecules different chemical and physical properties. There are three types of structural isomerism that you need to be aware of at school: chain isomerism, positional isomerism and functional isomerism. There is a fourth type, known as tautomerism (where there are two isomers are known as the keto and enol isomers) but you won’t come across this at school.

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  2. #2
    عضو ذهبي الصورة الرمزية تسنيم
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    افتراضي رد: Structural Isomerism

    STRUCTURAL ISOMERISM
    This page explains what structural isomerism is, and looks at some of the various ways that structural isomers can arise.
    What is structural isomerism?
    What are isomers?
    Isomers are molecules that have the same molecular formula, but have a different arrangement of the atoms in space. That excludes any different arrangements which are simply due to the molecule rotating as a whole, or rotating about particular bonds.
    For example, both of the following are the same molecule. They are not isomers. Both are butane.
    There are also endless other possible ways that this molecule could twist itself. There is completely free rotation around all the carbon-carbon single bonds.

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  3. #3
    عضو ذهبي الصورة الرمزية تسنيم
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    افتراضي رد: Structural Isomerism

    What are structural isomers?
    In structural isomerism, the atoms are arranged in a completely different order. This is easier to see with specific examples.
    What follows looks at some of the ways that structural isomers can arise. The names of the various forms of structural isomerism probably don't matter all that much, but you must be aware of the different possibilities when you come to draw isomers.
    Types of structural isomerism
    Chain isomerism
    These isomers arise because of the possibility of branching in carbon chains. For example, there are two isomers of butane, C4H10. In one of them, the carbon atoms lie in a "straight chain" whereas in the other the chain is branched.

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  4. #4
    عضو مميز الصورة الرمزية قمر بلحاج
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    افتراضي رد: Structural Isomerism

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