SEARCH Articles Figures Tables Benzene Hiickel approximation Debye-Hiickel approximation Electrical double layer Debye-Hiickel approximation Electronic spectroscopy Hiickel approximations Extended Hiickel approximation Hiickel Hiickel approximation, application Hiickel rule/approximation Hiickel theory, extended approximations Linearization approximation Debye-Hiickel Molecular orbital method Hiickel approximation Nonlinear Debye-Hiickel approximation Orbital properties Hiickel approximations Simple Hiickel molecular orbital theory approximations