Exam 2
October 28, 1999
1. For each of the following species write the lowest energy Lewis structure, indicate the formal charge and oxidation number of each atom, show the geometric structure and estimate the bond angles, indicate the σ hybridization about the central atom, and give the point group. a) XeO3, b) XeOF2, c) XeO64-, d) KrF2, e) SeF4.
2. Estimate the order of the boiling points for the four molecular species in question 1. Explain your reasoning.
3. In the paper by Leopold and his students, one of the justifications for the study was the relationship of the zwitterion to sulfamic acid. Sulfamic acid is a solid at room temperature. Suggest a reason why this is so, based on bonding interactions.
4. The characters for the total representation of the C-H bonds in CH4 are given below. Find the irreducible representations for this total representation.