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CH 3 Cl or CHCl 3 Which has greater dipole and why?

CH3Cl or CHCl3 Which has greater dipole and why?

Grade:11

1 Answers

Askiitians_Expert Yagyadutt
askIITians Faculty 74 Points
10 years ago

Hii deeksha

 

CH3Cl>CH2Cl2 >CHCl3 >CCl4   this is the trean for dipole moment ...

 

Reason .....

for CH3Cl > CHCl3 ...

       (1)        (2)

the dipole moments in both 1 and 2 are additive(that can be shown by drawing the tetrahedral structures of the two compounds and then finding the directions of bond polarity  for each bond). Cl tends to have a ∂- charge due its strong electro negativity and hence in 2 the Cl-Cl repulsion occurs as a result  of which the Cl-C-Cl bond angle increases. we know  that vector addition involves cos{bond angle}...hence as the bond angle increases the cosine value decreases and as a result the resultant dipole moment decreases !

 

Its better you keep this trend in mind....because there is always a question on this ...so remeber it...

 

regards

Yagya

askiitians_expert

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