Problem 69
Draw the Lewis structure of mercury(II) bromide. Is this molecule linear or bent? How would you establish its geometry?
Problem 71
Predict the geometry of sulfur dichloride \(\left(\mathrm{SCl}_{2}\right)\) and the hybridization of the sulfur atom.
Problem 72
Antimony pentafluoride \(\left(\mathrm{SbF}_{5}\right)\) reacts with \(\mathrm{XeF}_{4}\) and \(\mathrm{XeF}_{6}\) to form ionic compounds, \(\mathrm{XeF}_{3}^{+} \mathrm{SbF}_{6}^{-}\) and \(\mathrm{XeF}_{5}^{+}\) \(\mathrm{SbF}_{6}^{-}\). Describe the geometries of the cations and anions in these two compounds.
Problem 73
Assume that the third-period element phosphorus forms a diatomic molecule, \(\mathrm{P}_{2}\), in an analogous way as nitrogen does to form \(\mathrm{N}_{2}\). (a) Write the electronic configuration for \(\mathrm{P}_{2}\). Use \(\left[\mathrm{Ne}_{2}\right]\) to represent the electron configuration for the first two periods. (b) Calculate its bond order. (c) What are its magnetic properties (diamagnetic or paramagnetic)?
Problem 74
The molecule benzyne \(\left(\mathrm{C}_{6} \mathrm{H}_{4}\right)\) is a very reactive species. It resembles benzene in that it has a sixmembered ring of carbon atoms. Draw a Lewis structure of the molecule and account for the molecule's high reactivity.
Problem 75
Predict the bond angles for the following molecules: (a) \(\mathrm{BeCl}_{2}\), (b) \(\mathrm{BCl}_{3}\) (c) \(\mathrm{CCl}_{4}\) (d) \(\mathrm{CH}_{3} \mathrm{Cl}\) (e) \(\mathrm{Hg}_{2} \mathrm{Cl}_{2}\) (arrangement of atoms: \(\mathrm{ClHgHgCl}\) ), (f) \(\mathrm{SnCl}_{2}\), (g) \(\mathrm{H}_{2} \mathrm{O}_{2},\) (h) \(\mathrm{SnH}_{4}\).
Problem 76
Briefly compare the VSEPR and hybridization approaches to the study of molecular geometry.
Problem 77
Draw Lewis structures and give the other information requested for the following molecules: (a) \(\mathrm{BF}_{3}\). Shape: planar or nonplanar? (b) \(\mathrm{ClO}_{3}^{-}\). Shape: planar or nonplanar? (c) HCN. Polar or nonpolar? (d) \(\mathrm{OF}_{2}\). Polar or nonpolar? (e) \(\mathrm{NO}_{2}\). Estimate the ONO bond angle.
Problem 78
Describe the hybridization state of arsenic in arsenic pentafluoride \(\left(\mathrm{AsF}_{5}\right)\)
Problem 79
Determine whether (a) \(\mathrm{PCl}_{5}\) and (b) \(\mathrm{H}_{2} \mathrm{CO}\) (C double bonded to \(\mathrm{O}\) ) are polar.
