W2013CHM2311 Part 4a Notes

Bonding vs nonbonding interac0ons x fa 2px 2py 2pz

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: The greater the overlap the more the bonding MO is lowered and the higher the antibonding MO is raised. Although p orbitals are degenerate, pz can overlap head on, to form a very stable bonding MO and a very unstable antibonding MO. The σ orbital formed from the pz is very stable and the σ* antibonding orbital is very destablized. Overlap for the px and py orbitals (to give π/π*) is less and therefore the MO formed is not as far below the AO in energy terms Molecular Orbitals from s ­orbitals σ* ­anBbonding orbitals remove electrons from internuclear zone. σ* = 1sA – 1sB +  ­ σ* (1s) σ ­bonding orbitals concentrate electrons in internuclear zone. σ = 1sA + 1sB + σ (1s) The MO Diagram For H2 Energy ψ*MO = ϕ1sA  ­ ϕ1sB ΔE ϕ1sA ϕ1sB ψMO = ϕ1sA + ϕ1sB What About The MO Diagram of F2? energy Start by looking at the orbital energy ­level diagram for an isolated F atom. ↳  only consider valence orbitals x 2px 2py 2pz z y 2s What About The MO Diagram of F2? energy The MO diagram...
View Full Document

This note was uploaded on 03/28/2014 for the course CHM 2311 taught by Professor Richardson during the Winter '09 term at University of Ottawa.

Ask a homework question - tutors are online