Science, asked by ajay100, 1 year ago

why NH3 has greater dipole moment than NF3?

Answers

Answered by PDK

In NH3 N is more electronegative than H.So,N pulls the electron from H towards itself and so the moment due to NH bond is in the same direction as that of the lone pair of electrons on nitrogen and so Nh3 has higher dipole moment than NF3

ajay100: thak you

ajay100: later i will ask another question

PDK: sure

Answered by ElegantDoll

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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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