Molecular geometry and polarity - 1 | Molecular Geometry

General Chemistry 1 - Molecular geometry and polarity - 1

Which of the following molecules have dipole moments:

PCl3, BH3, AlCl3 and BrF3 ?

PCl3 ⇒ AX3E ⇒ trigonal pyramidal ⇒ bond dipoles do not cancel each other ⇒ dipole moment

BH3 ⇒ AX3 ⇒ trigonal planar ⇒ bond dipoles cancel each other ⇒ no dipole moment

AlCl3 ⇒ AX3 ⇒ trigonal planar ⇒ bond dipoles cancel each other ⇒ no dipole moment

BrF3 ⇒ AX3E2 ⇒ T-shaped ⇒ bond dipoles do not cancel each other ⇒ dipole moment