Topic: Expanded Octet

CHEMDUNN
05/09/2025 8 min

Listen "Topic: Expanded Octet"

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Episode Synopsis

This episode discusses three exceptions to the octet rule: incomplete octets (e.g., boron in BF3), odd electron species with an unpaired electron (e.g., NO), and expanded octets (e.g., sulfur in SF6). It explains that atoms in period 3 and beyond can have expanded octets due to available d orbitals. It emphasizes that while most molecules follow the rule, these exceptions are predictable based on an atom's period and total electron count and are crucial for understanding molecular behavior.
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