Abstract Applying the method of maximum overlap, the hybridization in bicyclo[2.1.0]pent-2-ene is determined. In addition, upon comparing these results with those of cyclobutene, cyclopropane, Dewar benzene and bicyclo[1.1.0]butane, it is found that the hybrids calculated by the method of maximum overlap are transferable between parts of molecules for which the structural features are similar.