The syntheses, antioxidant activities, acidity properties, experimental and theoretical investigations of vibrational
spectra (FT–IR and micro–Raman), 13C and 1H NMR chemical shifts and electronic properties of 3–alkyl–4–[3–
methoxy–4–(4–methylbenzoxy)benzylidenamino]–4,5–dihydro–1H–1,2,4–triazol–5–one (Me, Et and n–Pr) molecules
have been presented for the first time. The new compounds were analyzed for their potential antioxidant activities in
three different methods.The calculations of molecular structures, vibrational frequencies, 13C and 1H NMR chemical shifts
and electronic absorption wavelengths of the title molecules were computed by using the DFT/B3LYP method with 6–
31G(d) basis set which was used to have the structural and spectroscopic data about the mentioned molecules in the
ground state and the results calculated were compared with experimental values. Furthermore, gauge invariant atomic orbital
(GIAO) 1H and 13C NMR chemical shifts in different solvents (gas phase, DMSO and cholorofom), UV–vis. TD–
DFT calculations in ethanol solvent, the highest occupied molecular orbital (HOMO–1, HOMO), lowest unoccupied molecular
orbital (LUMO, LUMO+1), molecular electrostatic potential map (MEP), atomic charges and thermodynamic
properties of the title compounds have theoretically verified and simulated at the mentioned level. In addition, the calculated
infrared intensities and Raman activities of the compounds under study have also been reported.
首次介绍了 3-烷基-4-[3-甲氧基-4-(4-甲基苯氧基)亚苄基
氨基]-4,5-二氢-
1H-1,2,4-三唑-5-酮(Me、Et 和 n-Pr)分子的合成、抗氧化活性、酸性、振动光谱(傅立叶变换红外光谱和显微拉曼光谱)、13C 和 1H NMR
化学位移以及电子特性的实验和理论研究。利用 DFT/B3LYP 方法和 6- 31G(d) 基集计算了标题分子的分子结构、振动频率、13C 和 1H NMR
化学位移以及电子吸收波长,并将计算结果与实验值进行了比较。此外,在不同溶剂(气相、
DMSO 和 Cholorofom)、紫外-可见光(UV-vis.在
乙醇溶剂中进行的 TD- DFT 计算,对标题化合物的最高占位分子轨道(HOMO-1、HOMO)、最低未占位分子轨道(LUMO、LUMO+1)、分子静电位图(MEP)、原子电荷和热力学性质进行了理论验证和上述
水平的模拟。此外,还报告了所研究化合物的计算红外强度和拉曼活性。