List of Articles Natural bond orbital (NBO) Open Access Article Abstract Page Full-Text 1 - Theoretical study of HCX (NH2) (X= O, S, and Se) analogs in the gas phase: Electronic Structure, Natural Bond Orbital (NBO) & Natural Resonance Theory (NRT) golrokh Mahmoudzadeh ghazal kouchakzadeh 20.1001.1.27834107.2022.12.1.6.2