Problem: Which substance experiences dipole-dipole forces?a) CCl4b) NF3c) CS2d) SO3

FREE Expert Solution

a. CCl4

  • Carbon (EN = 2.5) is less electronegative than chlorine (EN = 3) so carbon is the central atom
  • The total number of valence electrons present in CCl4 is:


            Group             Valence Electrons

C         4A                   1 × 4 e4 e

Cl        7A                   4 × 7 e28 e

Total:  32 valence e


  • Carbon prefers to form 4 bonds while halogens, when not the central atom, form only 1 bond
  • The Lewis structure is:



  • C - surrounded by same atoms; Cl → no lone pairs → nonpolar

no dipole-dipole forces

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Problem Details

Which substance experiences dipole-dipole forces?
a) CCl4
b) NF3
c) CS2
d) SO3

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