Question

Identify the shape of \(\text{IF}_5\) molecule from the following options.

• A. Trigonal bipyramidal
• B. Square planar
• C. Hexagonal
• D. Square pyramidal

Hint:

Count bond pairs and lone pairs on iodine: 5 bond pairs and 1 lone pair.

Answer 1

The Correct Option is D

Step 1: Use the formula
Steric number $=\frac{1}{2}(7+5)=6$. So iodine is $sp^3d^2$ hybridised.

Step 2: Place the lone pair
Out of $6$ octahedral positions, one holds the lone pair. The $5$ F atoms form a square base with iodine slightly above it, giving a square pyramid.

Final Answer:
Option (D), square pyramidal. \[ \boxed{\text{(D)}} \]