Determine the electron geometry, molecular geometry, and idealized bond angles for each of the following molecules. In which cases do you expect deviations from the idealized bond angle?1.pf3

Question

2.sbr2
3.ch3br
4.bcl3

Answer 1

PF3
SBr2
CH3Br

CHCl3 - should have a bond angle of 109.5 as it is tetrahedral but the actual bond angle between the CH bond and CCl bonds will be less than 109.5 and the angle between CCl bonds will be more than 109.5. This is because the Cl atoms have electrons around them but the H does not so the Cl atoms repel each other and widen the bond angle.

SBr2 should be 104.5 as in H2O but because the Br atoms have electrons around them they will repel each other more than the H atoms in H2O so the bond angle will be more than 104.5

PF3 should be 107 as in NH3 because the F atoms have electrons around them they will repel each other more than the H atoms in NH3 so the bond angle will be more than 107