Physical Chemistry> Dipole Moment...

Why is the Dipole moment of CH3F less than CH3Cl though it should be opposite??

Himanshu Dogra , 14 Years ago

Grade 11

8 Answers

kiran kumar pidikiti

since the size of F atom is small , the bond moment of C-F is small than the bond moment of C-Cl

because of the large size of the chlorine atom

Last Activity: 14 Years ago

Himanshu Dogra

But F is more electronegative than Cl. Also, by your answer, CH3I should have higher dipole moment than CH3Cl but this is opposite.

Last Activity: 14 Years ago

Chantayya Badugu B

CH3Cl has larger dipole moment than CH3F because dipole moment is based on the product of distance and charge, and not just charge alone.

Fluorine is more electronegative than chlorine, but, the carbon-fluorine bond is also much shorter than the carbon-chlorine bond: 139 pm vs 178 pm. Thats why the dipole moment of chloromethane is higher than the dipole moment of fluoromethane.

Last Activity: 13 Years ago

Harshit Shah

As the size of fluorine is less compared to chlorine the bond pair electrons of carbon-fluorine bond will get repelled by the lone pair electrons of fluorine. So the dipole moment will decrease.While this ill not happen in choromethane.

Last Activity: 10 Years ago

Pankaj

As dipole moment depend on product of charge and distance between atom . Chlorine have exceptionally large size than fluorine and it have more partial charge than flourine.

Last Activity: 8 Years ago

Shubham Kumar

CH3Cl has higher dipole moment then CH3F because dipole moment is product of charge and distance between atoms In case of F the distance is very less as compared to that of Cl

Last Activity: 8 Years ago