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Why is iodine a good leaving group????
Pls anawer fast...

Dear Student,

Good leaving groups are weak bases. In order to be a leaving group, it must be able to accept electrons. So, it must have large size and low electronegativity. All these criteria are fulfilled by I, and so it is a good leaving group. 

Regards,

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whats the meaning of good leaving grp?
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The fact that the iodide ion is a good base/nucleophile as it is very capable of donating a lone pair of electrons to an electron deficient site also coincides with the fact that it is a good leaving group. This is because the stronger the acid that is formed from the leaving group, the better the leaving group
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