1-(2-NITROPHENYL)PIPERAZINE: NMR, RAMAN, FTIR AND DFT STUDIES

Year 2016, Volume: 17 Issue: 3, 521 - 529, 03.10.2016

Cemal Parlak Özgür Alver

https://doi.org/10.18038/btda.64950

Cited By: 1

Abstract

The structure of 1-(2-nitrophenyl)piperazine (NPP, C₁₀H₁₃N₃O₂) was characterized by nuclear magnetic resonance (NMR), Fourier Transform infrared (FTIR) and Raman techniques. The conformational analysis, nuclear magnetic shielding tensors, normal mode frequencies and corresponding vibrational assignments of NPP were examined using the density functional theory (DFT), with the Becke-3-Lee-Yang-Parr (B3LYP) functional and the 6-31G(d) and 6-311++G(d,p) basis sets. Reliable vibrational assignments were investigated by the total energy distributions (TED) obtained with scaled quantum mechanical (SQM) method. The hydrogen of NH group in piperazine and the phenyl fragment of NPP equatorially oriented relative to piperazine. There is a good agreement between the experimentally determined nuclear magnetic shielding tensors and vibrational frequencies of NPP and those predicted theoretically.

Keywords

1-(2-nitrophenyl)piperazine, NMR, Vibrational Spectra, DFT

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