Explain.(b) Which of the AF4 molecules in Exercise 9.30 will have a zero dipole moment?In Exercise 29 In Exercise 30 View Answer Predict whether each of the following molecules is polar or non-polar: (a) IF (b) CS2 (c) SO3 (d) PCl3 (e) SF6 (f) IF5 View Answer The geometry of the molecule is important here. If the molecule is symmetrical then it's dipole moment is zero and the molecule is non polar. For example, carbon dioxide (O=C=O) has two polar O=C bonds but since the directions are opposite for each other, the net dipole moment is zero and so the molecule is non polar. ClF is a linear molecule.
Polar or Non-Polar? In very symmetrical structures (e.g., CO 2 or CF 4), the individual bond dipoles effectively cancel each other and the molecule is non-polar. In less symmetrical structures (e.g., SO 2 and SF 4), the bond dipoles do not cancel and there is a net dipole moment which makes the molecule polar. O C O Linear Non-Polar CO2 SO2