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9C.5

Posted: Wed Dec 04, 2019 9:34 pm
by Laura WM 3I
For part (b) of this question, I understand the lewis structure has one double bonded oxygen (2 lone pairs) and 2 single bonded oxygens (3 lone pairs). Why can only the single bonded oxygens bind to a metal center? I initially guessed that each oxygen could bind to a metal because they all have lone pairs available for bonding.

Re: 9C.5

Posted: Wed Dec 04, 2019 9:35 pm
by Laura WM 3I
The question asks whether (CO_3)^2- is polydentate, and if so what is the maximum number of places the ligand can bind to a metal center.

Re: 9C.5

Posted: Wed Dec 04, 2019 11:31 pm
by AryaG_4C
Laura WM 3I wrote:For part (b) of this question, I understand the lewis structure has one double bonded oxygen (2 lone pairs) and 2 single bonded oxygens (3 lone pairs). Why can only the single bonded oxygens bind to a metal center? I initially guessed that each oxygen could bind to a metal because they all have lone pairs available for bonding.

Only the single bonded oxygens bond as they will then have a formal charge equal to 0 unlike in the case of the double bonded oxygen that already have a formal charge of zero.