Weblink 10.3 Movie showing how the HOMO and LUMO change during the H⁺ + ethene reaction

This movie shows how the HOMO (MO6) and the LUMO (MO7) change during the reaction between H⁺ and ethene. The HOMO starts out as the π bonding MO, but then as the H⁺ approaches electron density moves over to the hydrogen, ultimately giving a C—H bonding MO. The LUMO starts out as a 1s AO on the hydrogen and ends up as a vacant 2p AO on the left-hand carbon.

• Select which MO to view using the menu (be patient - there is a lot of data to load!)
• Click "play once" to play through the movie once, or "loop" to run the movie continuously
• Pause the movie with "pause" and resume with "carry on"
• Alter the speed using the radio buttons
• Alter the view by clicking and dragging in the usual way