Question

The compound $M{X}_6$ is octahedral. Find the number of ${90}^o$ X - M - X angles in the compound.(If number is X then enter X/3)

Answer 1

The compound $M{X}_6$ is octahedral. The number of $X-M-X$ angles in the compound is $12$. This is shown below. $4X$ atoms and $M$ are in one plane. They form $4X-M-X$ angles. One $X$ is above the plane. It forms $4X-M-X$ angles with $4X$ in the plane. One $X$ is below the plane. It forms $4X-M-X$ angles with $4X$ in the plane.