Which out of NH3 and NF3 has higher dipole moment and why ?
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In NH3, N is more electronegative than H. So, N pulls the electrons from H towards itself and so, the direction ofmoment due to the N-H bonds is in the same direction as that of the lone pair of electrons on Nitrogen. ... And, so wehave NH3 whose dipole moment is much higher than that of NF3.
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❤.In NH3, the directionof the orbital dipole moment due to lone pair is in the same direction of the 'resultant dipolemoment' of the 3N-H bonds.
❤.Hence,the net dipole moment of NH3 is positive.
❤. But in NF3, molecule the direction of the orbital dipole moment due to lone pair is in the opposite direction to the 'resultant dipole moment'of the 3 N-F bonds.
❤.Hence, its net dipole moment decreases.
❤. Therefore,dipole moment of NH3 is greater than that of NF3
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