Step 1: Sulfur (EN = 2.5) is less electronegative than chlorine (EN = 3) so sulfur is the central atom.
Step 2: The total number of valence electrons present in SCl6 is:
Group Valence Electrons
S 6A 1 × 6 e– = 6 e–
Cl 7A 6 × 7 e– = 42 e–
Total: 48 valence e–
Step 3: Sulfur follows an expanded octet to form 6 bonds while halogens, when not the central atom, form only 1 bond. The Lewis structure is:
Consider the following molecule:
Are the bonds polar or non-polar?
Is the molecule polar or non-polar?
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