Insights into structural and vibrational characteristics of 1-methoxy-4-[2-(phenylsulfonyl)vinyl]benzene: An application of experimental vibrational spectroscopy and density functional theory

被引：9

作者：

Srishailam, K. ^{[1
]}

Balakrishna, A. ^{[2
]}

Reddy, B. Venkatram ^{[3
]}

Rao, G. Ramana ^{[3
]}

机构：

[1] SR Univ, Sch Sci, Dept Phys, Warangal 506371, Telangana, India

[2] Indian Inst Technol, Dept Chem, Roorkee 247667, Uttaranchal, India

[3] Kakatiya Univ, Dept Phys, Warangal 506009, Telangana, India

来源：

JOURNAL OF MOLECULAR STRUCTURE | 2023年 / 1286卷

关键词：

alpha; beta-conjugated systems; Torsional scans; Vibrational spectra; DFT; AB-INITIO CALCULATIONS; BIOLOGICAL EVALUATION; MOLECULAR-STRUCTURE; RAMAN-SPECTRA; FORCE-FIELDS; BIPHENYL;

D O I：

10.1016/j.molstruc.2023.135572

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Fourier transform infrared and Raman spectra, in the spectral range 4000-400 and 4000-50 cm(-1), respectively, were measured for 1-methoxy-4-[2-(phenylsulfonyl)vinyl]benzene (MPB). Initial values of torsion angles around five flexible bonds C1-S, S-C15, C17-C19, C22-O and O-C30 (see Fig. 1 for numbering), essential for starting geometry optimization, were determined using "bond-pairing method" proposed earlier by us. Optimized structure parameters, harmonic general valence force field, vibrational fundamentals, potential energy distribution and infrared and Raman band intensities were determined using density functional theory, employing B3LYP/ 6-311++G(d,p) formalism. Good agreement was found, between measured and computed quantities investigated here. The r.m.s error between experimental and theoretical vibrational wavenumbers was 8.6 cm(-1), for MPB. With the help of PED and eigenvectors, all vibrational fundamentals of the molecule were assigned unambiguously for the first time.

引用

页数：8

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