Phellandrenes and Some Species from Them - A DFT Treatment

Phellandrenes are naturally occurring cyclic dienes belonging to cyclic monoterpene class and have many medicinal applications. In the present study, some resonance stabilized radicals from α- and β-phellandrene and also some closed shell structures from those radicals have been investigated within the constraints of density functional theory and basis set employed. For structure optimizations of the closed-shell and open-shell structures, B3LYP/6-311++G(d,p) and UB3LYP/6-311++G(d,p) level of theories have been adopted, respectively. All the systems considered have been found to be thermo chemically favorable and electronically stable. Various structural, quantum chemical and spectral properties of them have been obtained and discussed.