# What is the angle between electron groups in the trigonal planar electron geometry?

Jun 13, 2016

#### Answer:

If I can circumscribe an equilateral triangle inside a circle, what do you think it should be?

#### Explanation:

For $M {X}_{3}$, in which $M$ has trigonal planar coordination, $\angle X - M - X$ $=$ ${120}^{\circ}$.

Examples of real molecules that assume this geometry are $B C {l}_{3}$, and $A l C {l}_{3}$.