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[armenianpride]

Concerning Lewis structures, I know that a molecule with polar bonds can be nonpolar if the bond negativities cancel or are symmetrical so that they cancel out, etc., but are double bonds treated the same way? As in the case of BCl3, the lewis structure has the B double-bonded to ONE of the Cl's, and the rest are single bonds, and my question is,

Comments

[suziesprinkle]

BCl3's real Lewis structure only has single bonds in it... B is an exception to the octet rule and in the end only gets 6 electrons.

[armenianpride]

ooooooh i see...but then in general, if something has double bonds, does that count towards the polarity of it?

[suchire]

Yes, double bonds tend to make an already polar species more polar. Thus, a C=O bond is more polar than a C-O bond. Think about it as having more electrons to polarize.

[armenianpride]

lol no worries :)

p.s. i DID pass chem last year! haha