Weblink 15.4 MOs illustrating σ conjugation in an alkene

These MOs show the interaction between the C–C π MO and the C–H σ orbitals. (The geometry is slightly different from that shown in Fig. 15.11, so the MOs do not look exactly the same).

• 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.