Question

what is the dipole moment of ClF when electronegativity of Cl is 3 and fluorine is 4

Answer 1

The electronegativity difference between carbon and fluorine is about 1.431.43 (pauling scale), 1.6491.649(allen scale). The electronegativity difference between carbon and chlorine is about 0.610.61(pauling scale), 0.3250.325 (allen scale). Although, the electronegativity difference of C−FC−F bond is greater than electronegativity difference of C−ClC−Clbond, dipole moment of C−ClC−Cl bond (1.8601.860Debye) in CH3−ClCH3−Cl is greater than dipole moment of C−FC−F bond (1.8471.847 Debye) in CH3−FCH3−F, why?