Question #92104

1 Answer
Feb 4, 2015

BHC, or hexachlorobenzene, is a bezene ring (#C_6H_6#) in which all the hydrogen atoms have been replaced by chlorine atoms. The molecule still maintains the benzen ring structure, as you can see here

As you know, a molecule has to have double or triple bonds in order to have pi bonds. A single bond has one sigma bond and no pi bonds, a double bond has 1 sigma and 1 pi bonds, and a triple bond has 1 sigma and 2 pi bonds.

The structure of the hexachlorobenzene molecule shows the presence of 3 double bonds, which implies that the molecule has 3 pi bonds.