MY CART (5)

Use Coupon: CART20 and get 20% off on all online Study Material

ITEM
DETAILS
MRP
DISCOUNT
FINAL PRICE
Total Price: Rs.

There are no items in this cart.
Continue Shopping
Menu
Grade: Select Grade
        

Which is more acidic between trichloromethane and triflouromethane and why?

7 years ago

Answers : (1)

Godfrey Classic Prince
633 Points
							

Dear Himanshi Sharma,

We know that Fluorine(F) is more electronegative than Chlorine(Cl) .Therefore -I effect(Inductive Effect) of Fluorine(F) would be more and Trifluoromethane(CHF3) would be more acidic.

But this is not the case. As -M(Mesomeric Effect) effect also plays an important role in determining the acidity.We also know that -M(Mesomeric Effect) is considered over -I(Inductive Effect).

Now,If we compare the conjugate base of both the given molecules, C-Cl3 and C-F3, Chlorine(Cl) has vacant 3d orbitals whereas Fluorine(F) does not have any vacant d orbitals,infact it does not even have d-orbitals. Therefore Chlorine(Cl) can exert -M effect(Mesomeric Effect) due to availability of vacant d orbital but Fluorine(F) cannot exert the -M effect(Mesomeric Effect). -M effect(Mesomeric Effect) stabilises the negative charge and increases acidic strength. Therefore Trichloromethane(CHCl3) is more acidic than Trifluoromethane(CHF3).

 

Hope this helped you immensely..!!

All the Very Best & Good Luck to you...!!

 

Best Regards,

AskIITians Expert,

Godfrey Classic Prince

IIT-M

Please approve my answer if you liked it by clicking on "Yes" given below..!!Smile

7 years ago
Think You Can Provide A Better Answer ?
Answer & Earn Cool Goodies


Course Features

  • 731 Video Lectures
  • Revision Notes
  • Previous Year Papers
  • Mind Map
  • Study Planner
  • NCERT Solutions
  • Discussion Forum
  • Test paper with Video Solution


Course Features

  • 70 Video Lectures
  • Revision Notes
  • Test paper with Video Solution
  • Mind Map
  • Study Planner
  • NCERT Solutions
  • Discussion Forum
  • Previous Year Exam Questions


Ask Experts

Have any Question? Ask Experts

Post Question

 
 
Answer ‘n’ Earn
Attractive Gift
Vouchers
To Win!!! Click Here for details