DFT and Vibrational Spectroscopic Study on Methyl N-(2-furoyl)-N-(2,6-xylyl)-DL-Alaninate Fungicide

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Abstract:
The FTIR and FT-Raman spectra of methyl N-(2-furoyl)-N-(2,6-xylyl)-DL-Alaninate have been recorded in the range 400-4000cm-1 and 50-3500cm-1 respectively. The fundamental vibrational wavenumbers, intensities of vibrational bands and the optimized geometrical parameters of the compound were evaluated using DFT B3LYP method with 6-311G(d,p) basis set.. The 1H and 13C nuclear spectra have been recorded and chemical shifts of the molecule were also calculated using the gauge independent atomic orbital (GIAO) method. The observed and the calculated frequencies are found to be in good agreement stability of the molecule arising from hyper-conjugative interactions, charge delocalization has been analyzed using natural bond orbital (NBO) analysis.

Keywords:DFT , FT-IR , FT-Raman, methyl N-(2-furoyl)-N-(2,6-xylyl)-DL-Alaninate

References:

  1. Entry to Furalaxyl, In: Rompp online, Georg Thieme Publisher, accessed on January 3, 2015.
  2. David J.Fisher, Ann L . Hages , “ Mode of action of the systemic fungicides furalaxyl, metalaxyl and ofurace”, pesticide science, 13(3), 1982, 330-339.
  3. Qin.F, Gao YX, Guo BY, Xu P, Li JZ, Wang HL, “ environmental behavior of benalaxyl and furalaxyl enantiomers on agricultural soils”, Journal of Environmental Science Health B, 49(10), 2014, 738-746.
  4. A. Kerkenaar, A.Kaars sijpestejin, “ antifungal activity of metalaxyl and furalaxyl”, pesticide biochemistry and physiology, 15(1), 1981, 71-78.
  5. M.J.Frisch etal. Gaussian 09w program, Gaussian Inc, Wallingford, CT, 2009.
  6. AJ Camargo, HB Napolitano , JZ schpector, “ theoretical investigation of the intramolecular hydrogen bond formation, non-linear optic properties, and electronic absorption spectra of the 8-hydroxiquinoline, Journal of molecular structure 186(1), 2007, 145-151.
  7. D Arul Dhas ,I Hubert Joe , S Dawn DharmaRoy , S Balachandran , Spectroscopic analysis and charge transfer interaction studies of 4-benzyloxy-2-nitroaniline insecticide: a density functional approach, Spectra Chimica Acta Part A : Molecular and Biomolecular Spectroscopy 1(135), 2015, 583-596.
  8. AD Becke, Density functional thermochemistry 111 the role of exact exchange , Journal of Chemical Physics 98,1993, 5648-5652.
  9. AD Becke, Density- functional exchange-energy approximation with correct asymptotic behaviour, Phy Rev A 38 : 3098-3100, 1988.
  10. Lee C, Yang W, Parr RG ,Development of the Colle-Salvetti correlation- energy formula into a functional of the electron density, Phy Rev B 37, 1988,785-789.
  11. Merrick JP, Moran D, Radom L , An evaluation of harmonic vibrational frequency scale factors, J Phy Chem A 111(45) , 2007, 11683-11700
  12. G. Socrates, Infrared and raman characteristic group frequencies, 3rd edition, UK.(2004) p366.