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Garlic Bread Review 12b

Posted: Sun Nov 04, 2018 9:00 pm
by 705170809
12b) Draw the lowest energy Lewis structure for ClO4-
Why is the lowest energy Lewis structure have one of the three Oxygen atoms with 6 lone pairs instead of doing a double bond with Cl and 4 lone pairs like the rest of the oxygen atoms? The formal charges are the same, either Cl has -1 or the O has the -1, why is it the O that has the -1 charge though?

Re: Garlic Bread Review 12b

Posted: Sun Nov 04, 2018 9:05 pm
by chrisdinkel_4E
705170809 wrote:12b) Draw the lowest energy Lewis structure for ClO4-
Why is the lowest energy Lewis structure have one of the three Oxygen atoms with 6 lone pairs instead of doing a double bond with Cl and 4 lone pairs like the rest of the oxygen atoms? The formal charges are the same, either Cl has -1 or the O has the -1, why is it the O that has the -1 charge though?


By having 7 bonds to Cl, its formal charge becomes zero. You want the overall formal charge of the atom to become 0. You want the FC of -1 to be on the O rather than the Cl because you want the FC of the central atom to be 0.

Re: Garlic Bread Review 12b

Posted: Sun Nov 04, 2018 9:49 pm
by Christopher Tran 1J
Oxygen is more electronegative compared to chlorine, and therefore should be the atom with the negative formal charge in the molecule.