Problem Set 3 Chemistry 173a/268a Fall 2015 Due: November 16, 2015 1. (8 points) The planar cyclo-P4 molecule has four 3pz orbitals that contribute...

3.  Pyridine is an aromatic heterocyclic molecule in the C2v point group.Shown below are the SALCs for the pz orbitals which makeup the π-bonding network. (a)Arrange them in order of ascending energy and explain your rationale for the ordering.(b) Indicate if the SALCs are bonding, non-bonding, or antibonding. (c) Add theappropriate number of electrons and calculate the average C-C/C-N bond order