Chemistry 362
Fall 2015
Dr. Jean M. Standard
November 16, 2015
Problem Set 12
Good review problems in Engel & Reid: 23.3, 23.5, 23.6, 23.7, 23.11, 23.12, 23.14, 23.24
1.
+
Using the correlation diagram, what is the molecular electronic configuration of B2 ? Determine the bond
order.
2.
Using the correlation diagram, what is the molecular electronic configuration of N2? Determine the bond order.
3.
Determine the molecular electronic configurations and bond orders of the following compounds: C2, C2 , C2
using the correlation diagram. Which would be expected to have the longest bond length?
4.
Determine all the possible molecular term symbols arising from the σ g
5.
Determine all the possible molecular term symbols arising€from the σ π electron configuration.
6.
The simplest molecular ion is H2 . Determine the electron configuration and molecular term symbol of the
+
ground state of H2 .
7.
For the ground electronic configuration of B2 , determine the bond order and molecular term symbols.
8.
Diatomic halogen molecules, X2, with X=F, Cl, Br, I, have a ground electronic state with term symbol Σg. The
1
1
3
3
3
excited electronic states of these molecules have Σu, Πu, Σg, Σu, and Πu term symbols. What are the
allowed electronic transitions from the ground state?
9.
The attached figure shows a potential energy diagram for some of the electronic states of O2 (and O2 ).
–
1
1
( ) (σ *u )
2–
electron configuration.
1 1
+
+
1
+
3
a.) From the ground state of O2 (X Σ), what is the allowed electronic transition?
b.) From the figure, estimate the vertical transition energy in eV for the allowed transition.
c.) Will the molecule in the excited electronic state be vibrationally excited? Explain.
2
O2 and O2+ Potential Energy Curves