Chemistry · Huckel Molecular Orbital Theory

For the molecule methylenecyclopropene, the roots obtained from the Hückel secular determinant can be approximated as x = -2.0, -0.30, +1.0, +1.5, where x = α - Eβ with E being the energy of a π orbital. The delocalization energy of methylenecyclopropene is: (Given that the total π electron energy of two isolated ethylene molecules is 4α + 4β)