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Posted: Sun Nov 26, 2017 1:49 pm
The Lewis structure for part a of 4.23 (OSbCl3) shows Sb as the central atom with four single bonds and O has 3 lone pairs. Would an acceptable structure also be a double bond for O and 2 lone pairs or is there a specific reason why O has 3 lone pairs and not 2?
Posted: Sun Nov 26, 2017 2:14 pm
I'm fairly certain that having a double bond between Sb and O would be acceptable as well since making a double bond between Sb and O gives both atoms a formal charge of zero.
Posted: Sun Nov 26, 2017 6:28 pm
Yes, if the central atom were to form a double bond with the oxygen, the structure would be more stable due to the lowering of formal charge. However, regardless of which structure is drawn, the shape of the molecule stays the same. OSbCl3 is tetrahedral.