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What is the VSEPR formula for the chlorine trifluoride molecule?

1. AX5
2. AX3
3. AX3E2
4. AX5E2

Correct answer: AX3E2

Solution

Cl in ClF3 has 7 valence electrons; 3 are used in Cl-F bonds leaving 2 lone pairs. So the steric arrangement is 3 bonding + 2 lone = AX3E2 (T-shaped). Stored AX5 is wrong.

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