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Why dipole moment of ch3cl is higher than ch3I ,ch3br and ch3f ?

Why dipole moment of ch3cl is higher than ch3I ,ch3br and ch3f ?

Grade:12

1 Answers

Priyanshu Gujjar
101 Points
2 months ago

Dipole moments:-

CH3Cl = 1.860 Debye
CH3F = 1.847 Debye

Due to high electron density on flourine its partial charge is less...also C-F bond length is less 139 pm..
While C-Cl bond length is 
178 pm and also partial charge on Cl is more...

So according to the formula of Dipole moment..

Dipole moment = Partial charge on atom * Bond length..

CH3Cl has more dipole moment than CH3F...

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