halogens as nucleophiles

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Aoife Galvin 2D
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Joined: Fri Sep 25, 2015 3:00 am

halogens as nucleophiles

Postby Aoife Galvin 2D » Tue Mar 01, 2016 12:52 am

On page 152 in the Introduction to Organic Chemistry book, it states:
"halogens are also stable as anions due to their electronegativity, and organic reactions will often show curved arrows pointing towards them as they gain a pair of electrons and become negatively charged...as anions, halogens often act as nucleophiles"
So if as anions halogens are more stable, why would they then act as nucleophiles giving up the electrons that make them stable? Would that not be the opposite goal of a reaction, making the molecule less stable instead of more stable?

Posts: 12
Joined: Fri Sep 25, 2015 3:00 am

Re: halogens as nucleophiles

Postby 504554503 » Tue Mar 01, 2016 1:21 am

The quote says "they are also stable" not "they are most stable". I think halogens are most stable in their ground state i.e. after giving up the electrons.

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