Even though F is more electro -ve than Cl ,CHCl 3 has more dipole moment than CHF 3 . Why??

Even though F is more electro -ve than Cl ,CHCl3 has more dipole moment than CHF3 .  Why??


2 Answers

Anirudh mahendrakar
32 Points
11 years ago

the dipole moment doesn't only depend upon the electronegative element in the group...

it depends on the bond length..

the bond length of C-Cl>C-F

vikas askiitian expert
509 Points
11 years ago

dipole moment = q(d)

d is seperation bw atoms ....

in case of CHF3 , q(charge seperation) is more than in CHCl3 due to high electronegativity of F

, but due to large size of Cl atom ,distance bw C-Cl becomes more & dipoe moment of each

 C - Cl in CHCl3 becomes more than that of C-F in CHF3 ...

hence dipole moment is more for CHCl3 ...

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