• In 1956, British scientists R.J. Gillespie and R.S.
  • Nyholm recognized that the current model for explaining bond angles did not work well.
  • The acronym VSEPR stands for the valence-shell electron pair repulsion model.
  • The model states that electron pairs will repel each other such that the shape of the molecule will adjust so that theValence electron-pairs stay as far apart from each other as possible.
  • For the purposes of the V SEPR model, a double or triple bond is no different in terms of repulsion than a single bond.
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