Explain..why does O3 and NO2 show permanent dipole moment??
591Anurag because due to resonance one O-atom will permanently be +vely charged and the other 2 O-atoms will be half negatively charged..
O=O+-O- <--> O--O+=O
So there exists kind of partial double bond b/w them with one of the atoms having a +ve charge and 2 of the having slight -ve chargs
So we can say that there will always be a net dipole moment towards the -vely charged oxygen atoms
Anurag Ghosh Hmmmm....thanks...:)481I googled it......
The answer given was
The atoms are the same, but the bonds between them are not.
O=O-O ↔ O-O=O
Due to the resonance of the bonds, a very slight dipole is set up. This is strengthened by the shape of ozone, which is not linear but V-shaped.
But i am not understanding how resonance can cause dipole moment??..Its ok dat d angular shape of ozone permits it a small dipole moment..but resonance??
158alright..so the conclusion is that..if a molecule has a lone pair on central atom,and also it is resonance stabilised,the molecule is quite polar..
Anurag Ghosh Can we always say dat "if a molecule has a lone pair on central atom,and also it is resonance stabilised",the molecule is quite pola??..because in resonance we choose the most stabilised resonance hybrid...i.e...The one having the most charge separation or having no charge....so,can always resonance cause polarisation??591hmmm..i am not sure if that can be said or not..and i don't have any example now..will look for it