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Question

With what neutral molecule is ClO- isoelectronic? Is that molecule a Lewis base?


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Solution

Isoelectronic species and Lewis bases:

  • Two or more species are said to be isoelectronic if they have the same number of electrons or similar electronic structures.
  • Examples of Isoelectronic species are CO, NO+ and N2 since they all have 14 electrons.
  • A species can be termed Lewis Base if it can donate a pair of unshared electrons.
  • Examples of Lewis Bases are NH3, H2O, etc.

Understanding the case of ClO-:

  • The entity which is isoelectronic to Hypochlorite ion(ClO-) is Chlorine fluoride(ClF) as they both contain 26 electrons.
  • ClF is a Lewis base in presence of strong Lewis acid like Arsenic pentafluoride( AsF5 ) and accepting a fluoride ion from Potassium fluoride(KF).

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