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    The question is "chlorine reacts readily with ethane in the dark but does not react with methane unless sunlight or another source of ultra violet light is present"

    state and describe, with the aid of suitable equations
    -the mechanism of the reaction between chlorine and methane (i understand this)
    -the mechanism of the reaction between chlorine and ethane (i understand this)
    -the type of fission that the Cl-Cl bond undergoes (i understand this)

    my question is why does chlorine not react methane unless the catalyst is present? but does so for ethane when the catalyst is not present? as both molecules are non polar..is it to do with electron density in methane? HELP!
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    (Original post by hockeyjoe)
    The question is "chlorine reacts readily with ethane in the dark but does not react with methane unless sunlight or another source of ultra violet light is present"

    state and describe, with the aid of suitable equations
    -the mechanism of the reaction between chlorine and methane (i understand this)
    -the mechanism of the reaction between chlorine and ethane (i understand this)
    -the type of fission that the Cl-Cl bond undergoes (i understand this)

    my question is why does chlorine not react methane unless the catalyst is present? but does so for ethane when the catalyst is not present? as both molecules are non polar..is it to do with electron density in methane? HELP!
    You have got the question wrong.

    It should be ethene, not ethane
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    oh right, so the answer would be because of the high electron density on ethene's double bond, and methane is non polar and stable? so it needs a catalyst?
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    (Original post by hockeyjoe)
    oh right, so the answer would be because of the high electron density on ethene's double bond, and methane is non polar and stable? so it needs a catalyst?
    More or less ...

    Chlorine is dissociated by UV light into Cl. free radicals which are very reactive. They can react with alkanes via a FR mechanism which does not require polarity or go via ionic intermediates.

    Alkenes double bond is a region of high electron density that can be a focus for electrophilic attack by polar molecules (or molecules in which polarity can be induced)
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    (Original post by hockeyjoe)
    The question is "chlorine reacts readily with ethane in the dark but does not react with methane unless sunlight or another source of ultra violet light is present"

    state and describe, with the aid of suitable equations
    -the mechanism of the reaction between chlorine and methane (i understand this)
    -the mechanism of the reaction between chlorine and ethane (i understand this)
    -the type of fission that the Cl-Cl bond undergoes (i understand this)

    my question is why does chlorine not react methane unless the catalyst is present? but does so for ethane when the catalyst is not present? as both molecules are non polar..is it to do with electron density in methane? HELP!
    I don't understand this question at all...a little help please?
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    (Original post by imadeyouacookie)
    I don't understand this question at all...a little help please?
    Be more specific...

    What exactly do yo not understand?

    The fact that chlorine does not react with alkanes in the dark, but yes, with UV light?

    The fact that chlorine reacts with alkenes under most conditions?
 
 
 
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