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deeksha sharma Grade: 11
        

CH3Cl or CHCl3 Which has greater dipole and why?

7 years ago

Answers : (1)

Askiitians_Expert Yagyadutt
askIITians Faculty
74 Points
										

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

7 years ago
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