PROBLEM 16Q

What is the difference between electron geometry and molecular geometiy in VSEPR theory?

Solution 16Q

The difference between electron geometry and molecular geometry in VSEPR theory is given below.

Electron geometry is determined by number of electron groups present in the molecule.

For example:

Electron groups |
Electron Geometry |

2 |
linear |

3 |
Trigonal planar |

4 |
tetrahedral |

5 |
Trigonal bipyramidal |

6 |
octahedral. |

On the other hand, molecular geometry is dependent on the number of electron groups, as well as the number of lone pairs. The electron geometry and molecular geometry ar same when there are no lone pair of electrons.

For example:

Electron Groups |
Electron group geometry |
No of lone pair electrons |
Molecular geometry |

2 |
Linear |
1 |
Linear |

3 |
Trigonal planar |
0 |
Trigonal planar(CO32-) |

3 |
1 |
Bent (O3) |