Answer
Three examples of compounds that violate the octet rule are $PCl_{5}$, $BF_{3}$, and $SF_{6}$.
Work Step by Step
Three examples of compounds that violate the octet rule are $PCl_{5}$, $BF_{3}$, and $SF_{6}$.
In the above examples the central atoms P, B, and S contain 10, 6, and 12 electrons respectively in their valence shell.
$BF_{3}$ is an example of an incomplete octet molecule.
$PCl_{5}$ and $SF_{6}$ are examples of molecules with an expanded octet.
