Group Theory and Chemistry Basics 3: Assigning Point Groups

In this video we will learn how to assign point groups to molecules based on key molecular symmetry elements. Although this can be summarized in a flow-chart, it will be shown that you are no more than five key-questions away from assigning a molecule to its point group.
It is assumed you are familiar with molecular symmetry operations. An overview of these can be found in video 2 of this series: • Group Theory and Chemi...

[@Demon-pb5jm]

I dont understand how ptbr2cl4 only has one mirror plane. It looks like it has vertical and dihedral