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Lewis structures

  • 01-05-2008 12:52pm
    #1
    me2gud4u
    Closed Accounts Posts: 109 ✭✭


    hey, been doing these questions for a while now and certain ones I'm fnding really hard,
    can anyone tell me how I would draw the lewis structure for these following compunds, with lone pairs and electrons the works drawn in.

    H3SnF
    CH3PCl2
    H2SnF
    S2Cl2
    HSnCl3
    BrF....................is it just Br-F , with three set lone pairs on Br and likewise for F?
    SeCl4
    HSiF3.............is silicon in the middle of what looks like a tetrahedral structure with three flourines coming out of one side and the top of the structure a H?Then three lone pairs on each F?
    P4 (Not sure about this at all)
    SCl2 (think i may have this one)
    H2SnF2
    H2SiF2

    I would be so grateful if anyone would take the time to explain these structures briefly, as it would give me a pass alone if i can answer this question perfectly in the exam. Thanks.


Comments

  • #2
    SOL
    Registered Users Posts: 1,155 ✭✭✭SOL


    You are right for BrF and HSiF3

    P4 each P needs 3 bonds, and there are 4 of them so you get a tetrahedron right?

    SCl2, it just like say OF2
    Since Tin and silicon are in the same group you can expect the same lewis structure, a terahedron...

    At least I think so :)


  • #3
    ZorbaTehZ
    Registered Users Posts: 2,149 ✭✭✭ZorbaTehZ


    Yup, P4 is tetrahedral.
    H3SnF, Sn 4 valence electrons, so that should be pyrimidal.
    CH3PCl2, well that's going to have a strange shape no idea what its called.
    H2SnF, like above except there's a lone pair on Sn, so it would be pyrimidal too i think.
    I've got a test in this too next week(!), such an easy question once you get the hang of them.


  • #4
    me2gud4u
    Closed Accounts Posts: 109 ✭✭me2gud4u


    thanks a million folks.............thank god i'll be done with this stuff next week!!might have dossed a bit too much this yr!


  • #5
    SOL
    Registered Users Posts: 1,155 ✭✭✭SOL


    trigonal bipyramidal.... 5 points, a top a bottom, and three around the middle, that is assuming it is (CH3)3PCl2


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