Weblink 15.1 MOs of the trimethyl carbenium ion

MO1 shows the interaction between the 2p AO on the central carbon and C–H σ bonding MOs. The LUMO shows the same interaction, but in this MO the interaction is out-of-phase. Note that the LUMO is primarily located on the central carbon.

• Click and drag to rotate the structure; hold down shift, then click and drag to zoom.
• Select the MO to view using the menu.
• Select the type of surface using the radio buttons.
• Use the check box to display the nodal surface (zero contour - shown as a green mesh).
• Use the buttons to change the iso-surface value.