In which of the following molecules can you confidently

Problem 9:20In which of the following molecules can you confidently predict the bond angles about thecentral atom, and for which would you be a bit uncertain Explain in each case. (a) H2S, (b)BCl3, (c) CH3I, (d) CBr4, (e) TeBr4Solution 9:20Here, we have to determine the bond angles about the central atom by using Valence shellelectron pair repulsion (VSEPR) theory.Step 1:Valence shell electron pair repulsion (VSEPR) theoryIt is based on the electron groups surround the central atom (lone pairs, single bonds, multiplebonds, and single electrons). The number of electron groups is determined from the Lewisstructure of the molecule. The geometry of the molecule is dependent on the repulsions betweenelectron groups on interior atoms of a molecule that determine the angle and geometry of themolecule.Lone pair–lone pair > lone pair–bonding pair > bonding pair–bonding pairTherefore, the bond angles can vary from the predicted angles because double and triple bondsoccupy more space than single bonds and lone pairs occupy more space than bonding groups.Hence, the presence of lone pairs make the bond angles smaller than the ideal angle for theparticular geometry.