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Homework Help: Rationalization of bond angle/ bond pair repulsions.

  1. Apr 1, 2014 #1
    1. The problem statement, all variables and given/known data
    I need help rationalizing the following:
    a) Bond angle for H2S is only 92o whereas bond angle for H2O is 104.5o.

    b) If bond-pair<-> bond-pair repulsion is maximum for the C-H bonds in CH3X, ∑ all bond angles is 450o for CH3X

    c) For CH2Br2, the H-C-Br will be the smallest bond angle observed.

    2. Relevant equations
    main considerations:
    a) magnitude of central atom non-bonding pairs<->single bonding pairs repulsion w/ bonding-pair <-> bonding pair.

    b) I got nothing

    c) Br- Br repulsion? Magnitude of Br

    3. The attempt at a solution
    see main considerations

    I realize this is a lot. I appreciate any help/ guidance from someone with a firm grasp on this stuff.
    Thanks in advance.
  2. jcsd
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