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Sina Rahmani 4A
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Postby Sina Rahmani 4A » Fri Mar 04, 2016 5:18 pm

why is CH2I called Iodomethyl? I thought CH3I would be Iodomethyl. Thanks!

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Re: CH2I?

Postby Chem_Mod » Fri Mar 04, 2016 5:35 pm

CH3I is iodomethane, but CH2I invokes that it is a substituent, so it would be an iodomethyl group just like like the difference between methane (CH4) and methyl as a substituent (CH3).

Jasmeet Dhaliwal 3E
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Re: CH2I?

Postby Jasmeet Dhaliwal 3E » Fri Mar 04, 2016 5:36 pm

CH2I is called iodomethyl because the whole molecule is a substituent, but within this molecule, iodine is also acting as a substituent; it's a case of a substituent within a substituent. If we were to consider CH3I, carbon already forms four bonds. It would not be able to bond to another atom, and thus it could not be a substituent. CH3I is called iodomethane for this reason.

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