What is the molecular geometry of the Phosphorus pentachloride (PCl₅) molecule in the gas phase?

  1. Octahedral
  2. Tetrahedral
  3. Trigonal bipyramidal
  4. Square pyramidal

📝 Detailed explanation

In PCl₅, the central Phosphorus atom has 5 bonding pairs and 0 lone pairs. According to VSEPR theory, 5 electron domains result in a trigonal bipyramidal geometry.
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