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Regioisomeric bromodimethoxy benzyl piperazines related to the designer substance 4- bromo-2,5-dimethoxybenzylpiperazine: GC–MS and FTIR analysis  Karim.

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Presentation on theme: "Regioisomeric bromodimethoxy benzyl piperazines related to the designer substance 4- bromo-2,5-dimethoxybenzylpiperazine: GC–MS and FTIR analysis  Karim."— Presentation transcript:

1 Regioisomeric bromodimethoxy benzyl piperazines related to the designer substance 4- bromo-2,5-dimethoxybenzylpiperazine: GC–MS and FTIR analysis  Karim M. Abdel-Hay, Jack DeRuiter, C. Randall Clark  Forensic Science International  Volume 240, Pages (July 2014) DOI: /j.forsciint Copyright © Terms and Conditions

2 Fig. 1 Structures of the seven bromodimethoxy benzyl piperazines in this study. Forensic Science International  , DOI: ( /j.forsciint ) Copyright © Terms and Conditions

3 Fig. 2 EI mass spectra of the seven bromodimethoxy benzyl piperazines.
Forensic Science International  , DOI: ( /j.forsciint ) Copyright © Terms and Conditions

4 Fig. 3 EI mass spectral fragmentation pattern of the underivatized bromodimethoxy benzyl piperazines. Forensic Science International  , DOI: ( /j.forsciint ) Copyright © Terms and Conditions

5 Fig. 4 Proposed mechanism for the formation of the m/z 214/216 ion in the mass spectra of the brominated 2,3-dimethoxybenzylpiperazines (compounds 1 and 2). Forensic Science International  , DOI: ( /j.forsciint ) Copyright © Terms and Conditions

6 Fig. 5 Mechanism for the formation of the m/z 199/201 ion in the mass spectra of the underivatized and derivatized 2-methoxy regioisomers of the bromodimethoxy benzyl piperazines. Forensic Science International  , DOI: ( /j.forsciint ) Copyright © Terms and Conditions

7 Fig. 6 EI mass spectra of the pentafluoropropionyl derivatives of the seven piperazine compounds. Forensic Science International  , DOI: ( /j.forsciint ) Copyright © Terms and Conditions

8 Fig. 7 EI mass spectral fragmentation pattern of the PFP derivatives of the bromodimethoxy benzyl piperazines. Forensic Science International  , DOI: ( /j.forsciint ) Copyright © Terms and Conditions

9 Fig. 8 ATR FTIR spectra of the seven bromodimethoxy benzyl piperazines. Forensic Science International  , DOI: ( /j.forsciint ) Copyright © Terms and Conditions

10 Fig. 9 Gas chromatographic separation of the pentafluoropropionyl derivatives using Rtx-200 column. The numbers over the peaks correspond to the compound numbers in Fig. 1. Forensic Science International  , DOI: ( /j.forsciint ) Copyright © Terms and Conditions

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