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July 7th, 2015, 01:43 PM   #1
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ICl2 VSEPR, single electrons

I am preparing for a re-examination, and one of the previous test has the following question: Estimate the VSEPR model of ICl2.

This means, I have Iodine in the middle due to the electron negativity, and 21 electrons in total. Using the octet rule I end up with two lone pairs on the Iodine, and a single one, too. Now, according to my teacher's hopefully correct solution, the single electron will act as a lone pair, thus ICl2 will have three lone pairs on the iodine. Is this correct? I can't seem to find anything about single electrons in the VSEPR theory, and I have never heard of ICl2, and can't find a lewis structure of it. Is it safe to consider single electrons as lone pairs always? (Considering I am only doing high-school chemistry)
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July 11th, 2015, 11:51 AM   #2
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Yes, single electrons act as lone pairs. Perhaps your teacher meant it as only practice, however, i'm not certain $ICl_2$ exists in nature. You can also read any edition of "Chemistry: The Molecular Nature of Matter and Change" for more in-depth information about general chemistry.
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July 14th, 2015, 09:56 AM   #3
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Hello, and thank you very, very much for your response. Yes, my search for ICl2 had no results either.

Also, thanks for the recommendation, but we are already using a book called "General Chemistry", which I feel is quite complete.
The problem is my teacher simply hasn't shown how he has solved the tests, he only marks the answer (It is a multiple choice exam), so you never know why he puts the 'x' the way he does. Feels like a curricular minefield.
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