PCl5 is well known but NCl5 is not. Because,
p-Block Elements (Class 12) · Class 12 · JEE Main Previous Year Question
is well known but is not. Because,
- a✓
N does not have vacant d-orbital
- b
P does not have 2 d orbitals
- c
Back bonding in is not possible
- d
N atom is more electronegative so does not form 5 bonds
N does not have vacant d-orbital
Strategy: Consider the electronic configuration and availability of orbitals for covalency.
Step 1: Valence Shell Availability Nitrogen has only and orbitals. It lacks vacant -orbitals in its valence shell, limiting its maximum covalency to 4.
Step 2: Phosphorus Covalency Phosphorus have vacant orbitals, allowing it to expand its octet and form 5 bonds in .
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