Question

Practice Problem 01.62 Methylene chloride (CH,CI») has fewer chlorine atoms than chloroform (CHCIZ). Nevertheless, methylene chloride has a larger molecular dipole moment than chloroform. Explain. the effects of the other two chlorine atoms, thereby reducing the molecular dipole The third chlorine atom in chloroform partially cancels moment relative to methylene chloride.

Answer 1

Solution CH₂Cl2 СНИ, Сти HC26 cel H C Chloroform Methylene chloride As we know that dipole moment is the vector quantity. In methylene chloride direction of dipole moment of C-H bond toward carbon side (carbon is more electronegative than H) and direction of dipole moment of C-U bond will be towards chlorine side I chlorine is more electronegative than Carbon). So dipale moment will not cancel But in chloroform two c-d bond dipole moment will partially cancel (tetraheporal geometry of CHCl3 ) and GHI bond and c-cl bond dipole moment will add up. so we can say that Methylene chlorich has a larger molecular dipole moment than chloroform because in Chloroform 2,(-Ce bond dipole moment with cancel each other. Scanned with CamScanner