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Which has the higher dipole moment ? Allyl bromide or vinyl bromide and why

Which has the higher dipole moment ? Allyl bromide or vinyl bromide and why

Grade:12th pass

2 Answers

Ankit Kumar Sharma
48 Points
7 years ago
Dipole moment is directly proportional to the electronegativity difference and the distance between the atoms or induced charges.Now +R effect of Bromine can`t be considered due to orbital mismatch. So in allyl bromide there should be a canonical structure having CH2-CH-CH2+ Br- , where as in vinyl bromide such canonical is not there and the electronegativity difference between Bromine and SP2 hybridised carbon is less. Hance Allyl bromide should have higher dipole moment.
Bidhan Kumbhakar
13 Points
7 years ago
Can I explained with bond length . in allyl bromide have 1sp and 2 sp2 carbon atom & if the bond length is shorter thn dipole moment is less . is it perfect ??

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