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Paper Information

Journal:   JOURNAL OF PHYSICAL AND THEORETICAL CHEMISTRY   spring 2018 , Volume 15 , Number 1; Page(s) 27 To 38.

Computational Investigation on Naphtoquinone Derivatives: Nuclear Magnetic Resonancs (NMR) and Quantum Mechanic

* Department of chemistry, Robat Karim Azad University, Robat Karim, Iran
Naphthoquinones are natural aromatic compounds that can be discovered in various plant families. In recent times a diversity of biological activities of these compounds has been reported. In most cases, these pharmacological activities are related to redox and acid-base properties, which can be modulated synthetically by modifying the substituents attached to the 1, 4-naphthoquinone ring, in order to enhance their therapeutic actions. In the current study we used dipole moment and nuclear magnetic resonance (NMR) to depict these molecules properties. The density functional theory (DFT) calculations at the level of B3LYP/6-31G* have been applied to analyze the substituent effect on the electronic structural properties including thermochemical parameters of Naphtoquinone Derivatives in gas phase using Gaussian 98. Dipole moment (Debye), energy of structure formation (HF/Kcal/mol) and point group, NMR parameters such as isotropic shielding (σ iso) and anisotropic shielding (σ aniso), σ 11, σ 22, σ 33 obtained. Also thermodynamic properties and natural bond orbitals (NBO) were calculated. It dovetails our recent work of electron transfer pathways on Naphtoquinone Derivatives in different replacement is a fundamental step in constructing a knowledge base which will ultimately be of use in many cases.
Keyword(s): Biological activities,Dipole moment,Thermodynamic properties,DFT,Debye
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