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Structural and spectral characterization of two 1-phenyl-1,2-propanedione bis{N(4)-alkylthiosemicarbazones} |
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| Authors: | A Casti eiras E Bermejo L J Ackerman H Beraldo J Vald s-Martí nez S Hern ndez-Ortega and D X West |
| Institution: | a Departamento de Química Inorgánica, Universidad de Santiago de Compostela, E-15706 Santiago de Compostela, Spain b Department of Chemistry, lllinois State University, Normal, IL 61790-4160, USA c Departmento de Química, Universidade Federal de Minas Gerais, 30161, Belo Horizonte, Brazil d Instituto de Química, Universidad Nacional Autónoma de Mèxico, Circuito Exterior, Ciudad Universitaria, Coyoacán 04510, Mexico |
| Abstract: | 1-phenyl-1,2-propanedione bis{N(4)-methyl- and {N(4)-ethylthiosemicarbazone}, H2Pm4M and H2Pm4E, respectively, have been prepared, studied spectroscopically (1H NMR, ultraviolet and infrared) and their crystal structures solved. Intermoiety hydrogen bonding does not occur in H2Pm4M and H2Pm4E, in contrast to the analogous bis{N(4)-thiosemicarbazones} prepared from 1-phenylglyoxal. The two thiosemicarbazone moieties are on the opposite side of the carbon–carbon backbone, but the N(4)Hs intramolecularly hydrogen bond to the imine nitrogen for each moiety. |
| Keywords: | 1-phenyl-1 2-propanedione Bis(thiosemicarbazone) Crystal structure N(4)-methylthiosemicarbazone N(4)-ethylthiosemicarbazone |
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