Add time:09/24/2019         Source:sciencedirect.com

A combined experimental and theoretical analysis of on molecular structure, vibrational spectra and HOMO-LUMO analysis of 1-{3-(4-chlorophenyl)-5-[4-(propan-2-yl)phenyl]-4,5-dihydro-1H-pyrazol-1-yl}-ethanone is reported. The equilibrium geometry and vibrational wavenumbers have been computed using desnity functional B3LYP method with 6–311++G(d) (5D, 7F) as basis set. The nonlinear optical properties were evaluated by the determination of the first and second hyperpolarizabilities of the title compound. HOMO is localized over the whole molecule except the ring PhIII and the CH3 groups attached to the PhIII while the LUMO is located through out the whole molecule except the CH3 groups attached with the PhIII and this shows that an eventual charge transfer occurs within the molecule. From the molecular electrostatic potential study, the negative electrostatic potential regions are mainly localized over the carbonyl group, phenyl rings and are possible sites for electrophilic attack and the positive regions are localized over the nitrogen atoms as possible sites for nucleophilic attack. The docked ligand title compound forms a stable complex with kinesin spindle protein (KSP) and gives a binding affinity value of −6.7 kcal/mol the results suggest that the compound might exhibit inhibitory activity against KSP.

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