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 what is the dipole moment of carbon monoxide? is the dipole  moment of carbon dioxide zero?

Asked by Anu Priya(student) , on 10/7/11


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EXPERT ANSWER

Hi,
The dipole moment of CO is about 0.112 D. It is not zero but is very less. C is triply bonded to O.O is more electronegative than C and so the molecule is polar with a slight negative charge at the O end and a slight positive charge at the C end .When the electron pair is donated to C by O via the coordinate bond, the partial negative charge on O decreases and that of carbon increases which result in lower difference of effective electronegativity between the atoms in the compound which in turn suppresses the dipole moment. This is the reason for the lower dipole moment of CO.
Hope this helps.
Good luck!

Posted by Pooja Baruah(MeritNation Expert)on 11/7/11

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