Structure analysis and spectroscopic characterization of 2-Fluoro-3-Methylpyridine-5-Boronic Acid with experimental (FT-IR, Raman, NMR and XRD) techniques and quantum chemical calculations


ALVER Ö., Dikmen G.

JOURNAL OF MOLECULAR STRUCTURE, vol.1108, pp.103-111, 2016 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 1108
  • Publication Date: 2016
  • Doi Number: 10.1016/j.molstruc.2015.11.041
  • Journal Name: JOURNAL OF MOLECULAR STRUCTURE
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.103-111
  • Keywords: 2-Fluoro-3-Methylpyridine-5-Boronic Acid, NMR, Infrared and Raman spectra, Vibrational wavenumbers, DFT, DENSITY-FUNCTIONAL THEORY, SPIN COUPLING-CONSTANTS, VIBRATIONAL-SPECTRA, MOLECULAR-STRUCTURE, AB-INITIO, N-15 NMR, ORGANOBORON COMPOUNDS, DIMERIC STRUCTURES, DFT CALCULATIONS, HOMO-LUMO
  • Eskisehir Osmangazi University Affiliated: Yes

Abstract

Possible stable conformers, geometrical molecular structures, vibrational properties as well as band assignments, nuclear magnetic shielding tensors of 2-Fluoro-3-Methylpyridine-5-Boronic Acid (2F3MP5BA) were studied experimentally and theoretically using FT-IR, Raman, (CP/MAS) NMR and XRD spectroscopic methods. FT-IR and Raman spectra were evaluated in the region of 3500-400 cm(-1), and 3200-400 cm(-1), respectively. The optimized geometric structures, vibrational wavenumbers and nuclear magnetic shielding tensors were examined using Becke-3 Lee-Yang-Parr (B3LYP) hybrid density functional theory method with 6-311++G(d, p) basis set. H-1,C-13 NMR chemical shifts were calculated using the gauge invariant atomic orbital (GIAO) method. H-1, C-13, APT and HETCOR NMR experiments of title molecule were carried out in DMSO solution. C-13 CP/MAS NMR measurement was done with 4 mm zirconium rotor and glycine was used as an external standard. Single crystal of 2F3MP5BA was also prepared for XRD measurements. Assignments of vibrational wavenumbers were also strengthened by calculating the total energy distribution (TED) values using scaled quantum mechanical (SQM) method. (C) 2015 Elsevier B.V. All rights reserved.