Application In Synthesis of 4-Methoxybenzaldehyde. In 2021 RSC ADV published article about NONLINEAR-OPTICAL PROPERTIES; PHASE ELECTRON-DIFFRACTION; GAUSSIAN-BASIS SETS; MOLECULAR-STRUCTURE; MICROWAVE-SPECTRUM; INTERNAL-ROTATION; FORMAMIDE; SPECTROSCOPY; CHROMOPHORES; BENZALDEHYDE in [Lokshin, Vladimir; Larina, Nina; Khodorkovsky, Vladimir] Aix Marseille Univ, CNRS, CINaM UMR 7325, F-13288 Marseille, France; [Sigalov, Mark] Ben Gurion Univ Negev, Dept Chem, IL-84105 Beer Sheva, Israel; [Larina, Nina] Thales DIS France SA, Ave Pic Bertagne 13 420, Gemenos, France in 2021, Cited 74. The Name is 4-Methoxybenzaldehyde. Through research, I have a further understanding and discovery of 123-11-5.
We find that quantum mechanical calculations using B3LYP/aug-cc-pVTZ model chemistry involving anharmonic correction on simple conjugated organic compounds without rotating moieties provide the dipole moment values and molecular geometries with high accuracy. In the presence of one or two conjugated electron donating or accepting substituents capable of hindered rotation, the calculated dipole moments reproduce the experimental results equally well only in the cases when the experiments were done at the temperatures at which rotation of substituents remains hindered. In order to reproduce the experimental dipole moments determined at higher temperatures, a model assuming free (unhindered) rotation should be applied. In these cases, the contribution of each rotamer is equal and using anharmonic correction is not necessary. The APFD functional produces similar results and the M062X functional yields larger deviations from the experimental data. The other methods, like HF and MP2, are the least accurate with the basis sets usually employed for interpreting the experimental data.
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,Preparation of Indole Containing Building Blocks for the Regiospecific Construction of Indole Appended Pyrazoles and Pyrroles