Why does sulfur break the octet rule?
Answers
Answer:
Explanation:
Here the sulfur atom has six electron pairs in its valence shell. An atom like phosphorus or sulfur which has more than an octet is said to have expanded its valence shell. This can only occur when the valence shell has enough orbitals to accommodate the extra electrons.
The octet rule can be 'expanded' by some elements by utilizing the d- orbitals found in the third principal energy level and beyond. Sulfur, phosphorus, silicon, and chlorine are common examples of elements that form an expanded octet.
Sulfur can make use of its 2 unpaired electrons to form 2 covalent bonds plus the 4 electrons from its 2 lone pairs to give a total of 8 electrons. Hence sulfur obeys octet rule in this case. But sulfur can unpair its electrons and promote one of its electrons (highlighted in green) to an empty 3d orbital.
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