Question

Determine the electron geometry (eg) and molecular geometry (mg) of the underlined atom ch3och3.

Answer 1

The electron geometry is tetrahedral and the molecular geometry is tetrahedral. If a molecule of CH3OCH3 is to be drawn, the two carbons would have four single bonds and the middle O would have two single bonds and the two lone pairs. Molecular geometry does not consider the lone pairs as bonds like in electron domain geometry. However, since the carbons do not contain any lone pairs, its electrons domain and molecular geometry will be the same. Therefore; Both carbons are tetrahedral for electron domain geometry and molecular geometries. The O is tetrahedral for the electron domain geometry and bent for molecular geometry.

Answer 2

Its electron domain geometry and molecular geometry are both tetrahedral.

The shape of the central atom depends on the number of electron pairs that surround it. The molecular geometry is determined by the number of atoms or groups that surround the central atom while the electron geometry depends on the number of electron pairs (bond pairs and lone pairs) that surround the central atom.

Looking at the underlined atom, we can see that it is surrounded by four electron domains and no lone pairs hence its electron domain geometry and molecular geometry are both tetrahedral.

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