<abstract xmlns="http://www.w3.org/1999/xhtml">

In the present study, some 2- and 3-substituted piperidin-4-ones (<bold>A1-A3</bold>) were chosen as proton acceptor and maleic anhydride was chosen as proton donor. Piperidin-4-ones (<bold>A1, A2 ---amp--- A3</bold>) were mixed with maleic anhydride in ether medium and the corresponding molecular adduct products (<bold>B1, B2 ---amp--- B3</bold>) thus obtained were collected and purified. The 1H and 13C NMR spectra were recorded for piperidine-4-one and their addition compounds. The 1H and 13C NMR chemical shifts of products (<bold>B1, B2 ---amp--- B3</bold>) are analyzed and compared with those of the corresponding piperidine-4-ones (<bold>A1, A2 ---amp--- A3</bold>). In order to confirm the formation of molecular addition compounds the GC-Mass spectrum was recorded for all adducts B1-B3 and the fragmentations patterns were analyzed.
</abstract>

In the present study, some 2- and 3-substituted piperidin-4-ones (A1-A3) were chosen as proton acceptor and maleic anhydride was chosen as proton donor. Piperidin-4-ones (A1, A2 ---amp--- A3) were mixed with maleic anhydride in ether medium and the corresponding molecular adduct products (B1, B2 ---amp--- B3) thus obtained were collected and purified. The 1H and 13C NMR spectra were recorded for piperidine-4-one and their addition compounds. The 1H and 13C NMR chemical shifts of products (B1, B2 ---amp--- B3) are analyzed and compared with those of the corresponding piperidine-4-ones (A1, A2 ---amp--- A3). In order to confirm the formation of molecular addition compounds the GC-Mass spectrum was recorded for all adducts B1-B3 and the fragmentations patterns were analyzed.

Spectral investigations of some piperidin-4-one molecular addition compounds

thirunarayanan.g.10313@annamalaiuniversity.ac.in

Ovidius University Annals of Chemistry

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

{"article-title":"Spectral investigations of some piperidin-4-one molecular addition compounds"}

In the present study, some 2- and 3-substituted piperidin-4-ones (A1-A3) were chosen as proton acceptor and maleic anhydride was chosen as proton donor....

Spectral investigations of some piperidin-4-one molecular addition compounds

Published Online: May 04, 2020

Page range: 18 - 26

Received: Feb 22, 2020

Accepted: Apr 08, 2020

DOI: https://doi.org/10.2478/auoc-2020-0005

Keywords
piperidine-4-ones, molecular addition, steric effect, polar effect, NMR spectra

© 2020 Jayaraman Chakkaravarthy et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Spectral investigations of some piperidin-4-one molecular addition compounds

Published Online: May 04, 2020

Page range: 18 - 26

Received: Feb 22, 2020

Accepted: Apr 08, 2020

DOI: https://doi.org/10.2478/auoc-2020-0005

Keywordspiperidine-4-ones, molecular addition, steric effect, polar effect, NMR spectra

© 2020 Jayaraman Chakkaravarthy et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Keywords
piperidine-4-ones, molecular addition, steric effect, polar effect, NMR spectra