PLEASE help, dimers??

Discussion in 'DAT Discussions' started by 113zami, Jun 17, 2008.

  1. 113zami

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    can someone please help me with this question, THANKS

    which molecule is likely to form dimers?

    a)BF3
    b)NO2-
    c)NO2
    d)NO2+

    the correct answer is C , C is a radicle and I can uderstand why it would form dimers but why wouldn't the other choices be able to form dimers?, to my knowledge any 2 molecules can form dimers there isn't really a restriction to forming dimers am i right:confused:
     
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  3. theedaddy77

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    wtf is a dimer?
     
  4. 113zami

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    a good example would be when 2 molecules capable of forming hydrogen bonds come near each other such as 2 carboxylic acids, when they come near each other and form hydrogen bonds, that's a dimer,
     
  5. theedaddy77

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    a)BF3
    b)NO2-
    c)NO2
    d)NO2+

    For a there is an acid but no base so yeah
    for b it is resonace stablized no reaction
    for c has a loan pair therefor a reaction is possible which allows for dimar to happen
    for d also stable due to resonace.
     
  6. osimsDDS

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