Electronic and optical spectroscopic insights into 2.3.4-trimethyl pentane conformations by long-range corrected DFT calculations, experimental low frequency Raman and IR temperature sensitivity and scaled vibrational assignment-Reference-Cited by-同舟云学术

Electronic and optical spectroscopic insights into 2.3.4-trimethyl pentane conformations by long-range corrected DFT calculations, experimental low frequency Raman and IR temperature sensitivity and scaled vibrational assignment

Published:2022-11-10 Issue: Volume: Page:
ISSN:
Container-title:
language:
Short-container-title:

Author:

Hachim Mouhi Eddine¹,Sadik Karima¹,Byadi Said²,Tebbaai Hajar²,Hamdani Naoual El¹,Aboulmouhajir Aziz²

Affiliation:

1. Chouaib Doukkali University

2. University of Hassan II Casablanca

Abstract

Abstract Conformational, spectroscopic and electronic behaviors of the 2.3.4-trimethyl pentane (2.3.4-TMP) molecule were carried out based on density functional theory DFT calculations with the long-range dispersion correction through CAM-B3LYP and WB97XD levels at aug-cc-pvtz basis set. Electronic properties of this molecule, such as HOMO-LUMO, molecular static polarizability, hyperpolarizability parameters, and molecular electrostatic surface potential (MEP) are also investigated. Deep and multiple spectroscopic investigations were used to characterize and differentiate between the stable conformers of 2.3.4-TMP. The experimental Fourier Transform infrared (FTIR) and Raman spectra were recorded. The spectral temperature sensitivity and scaled vibrational assignment for all the five lowest conformers A-E were carried out. A good correlation between experimental and calculated frequencies was observed with a standard deviation (RMS) of 4 cm-1 below 1500 cm-1 and 6 cm-1 for all other frequencies.1H and 13C NMR spectra were simulated using GIAO-WB97XD/aug-cc-pvtz in Dimethyl Sulfoxide (DMSO) solvent, and the observed results agreed well with their experimental counterparts. Electronic transitions were analyzed using TD-WB97XD/aug-cc-pvtz simulated to have the UV-Vis spectra of the five conformers.

Publisher

Research Square Platform LLC

Reference20 articles.

1. A. E. Klingbeil, J. B. Jeffries, and R. K. Hanson, “Temperature- and composition-dependent mid-infrared absorption spectrum of gas-phase gasoline: Model and measurements,” Fuel, vol. 87, no. 17–18, pp. 3600–3609, Dec. 2008, doi: 10.1016/J.FUEL.2008.06.020.

2. Electronic investigation and spectroscopic analysis using DFT with the long-range dispersion correction on the six lowest;Hachim ME;J. Mol. Model.,2020

3. Ab initio study on the six lowest energy conformers of iso-octane: conformational stability, barriers to internal rotation, natural bond orbital and first-order hyperpolarizability analyses, UV and NMR predictions, spectral temperature sensitivity, and sc;Hachim ME;J. Mol. Model.,2019

4. N. J. Delraso, D. R. Mattie, and C. S. Godin, “In vitro toxicity of solubilized 2,3,4-trimethylpentane. I. Cytotoxicity and metabolism of TMP using primary hepatocytes,” In Vitro Cell. Dev. Biol., vol. 25, no. 11, pp. 1031–1038, Nov. 1989, doi: 10.1007/BF02624137.

5. S. K. Alghamdi, F. Abbas, R. K. Hussein, A. G. Alhamzani, and N. T. El-Shamy, “Spectroscopic characterization (IR, UV-Vis), and HOMO-LUMO, MEP, NLO, NBO Analysis and the Antifungal Activity for 4-Bromo-N-(2-nitrophenyl) benzamide; Using DFT Modeling and In silico Molecular Docking,” J. Mol. Struct., vol. 1271, p. 134001, Jan. 2023, doi: 10.1016/J.MOLSTRUC.2022.134001.