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CBSE Class 11-science Answered

If B–Cl bond has a dipole moment, explain why BCl3 molecule has zero dipole moment.
Asked by Topperlearning User | 12 Aug, 2014, 05:09: PM
answered-by-expert Expert Answer

  • B-Cl has a dipole due to the difference in the electronegativity of boron and chlorine atom.
  • The overall dipole of a molecule also depends on the geometry.
  • The geometry of BCl3 is planar with a bond angle of 120 degree.
  • The resultant dipole of two B-Cl bonds cancels the third one, resulting in net zero dipole.

 

Answered by | 12 Aug, 2014, 07:09: PM
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