Abstract
NMR and single crystal X-ray structure data for four structurally similar semicarbazones and thiosemicarbazones were compared. In solution, proton NMR showed considerable variation in their chemical shift values especially for the NH2 protons. In the case of the semicarbazones this peak appeared as a broad singlet with an integration ratio of two while for the thiosemicarbazones the amino group showed two distinct singlets with marked chemical shift differences. This is attributed to the differences in the canonical forms of the thiosemicarbazone amino group and the semicarbazone analogue. Additionally, we provide evidence that the 2-trifluoromethyl phenyl substituted semicarbazone (2) formed an intermolecular hydrogen bond with one of the hydrogens of the NH2 group while this was totally absent in the thiosemicarbazone. We explain this by the restricted rotation of the CN bond in the thiosemicarbazone due to its double bond character compared to the less restricted rotation in semicarbazone compound.
Graphical Abstract
NMR and single crystal X-ray structure data for four structurally similar semicarbazones and thiosemicarbazones were compared for their hydrogen bonding characteristics.
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Klayman DL, Scovill JP, Bartosevich JF, Mason CJ (1979) J Med Chem 22:1367–1373
Easmon J, Heinisch G, Holzer W, Rosenwirth B (1992) J Med Chem 35:3288–3296
Kalinowski DS, Yu Y, Sharpe PC, Islam M, Liao Y-T, Lovejoy DB, Kumar N, Bernhardt PV, Richardson DR (2007) J Med Chem 50:3716–3729
Richardson DR, Sharpe PC, Lovejoy DB, Senaratne D, Kalinowski DS, Islam M, Bernhardt PV (2006) J Med Chem 49:6510–6521
Shipman C Jr, Smith SH, Drach JC, Klayman DL (1981) Antimicrob Agents Chemother 19:682
Aouad F, Florence A, Zhang Y, Collins F, Henry C, Ward RJ, Crichton RR (2002) Inorg Chim Acta 339:470–480
Chaston TB, Lovejoy DB, Watts RN, Richardson DR (2003) Clin Cancer Res 9:402–414
Chaston TB, Watts RN, Yuan J, Richardson DR (2004) Clin Cancer Res 10:7365–7374
Le NT, Richardson DR (2004) Blood 104:2967–2975
Nurtjahja-Tjendraputra E, Fu D, Phang JM, Richardson DR (2007) Blood 109:4045–4054
Richardson DR (2005) Curr Med Chem 12:2711–2729
Suvarapu LN, Somala AR, Koduru JR, Baek SO, Ammireddy VR (2012) Asian J Chem 24:1889
Yuan J, Lovejoy DB, Richardson DR (2004) Blood 104:1450–1458
Kalinowski DS, Quach P, Richardson DR (2009) Future Med Chem 1:1143–1151
Lobana TS, Sharma R, Bawa G, Khanna S (2009) Coord Chem Rev 253:977–1055
Dearling JL, Blower PJ (1998) Chem Commun 2531–2532
Donnelly PS (2011) J Chem Soc Dalton Trans 40:999–1010
Fujibayashi Y, Taniuchi H, Yonekura Y, Ohtani H (1997) J Nucl Med 38:1155
Green MA, Mathias CJ, Willis LR, Handa RK, Lacy JL, Miller MA, Hutchins GD (2007) Nucl Med Biol 34:247–255
Oh M, Tanaka T, Kobayashi M, Furukawa T, Mori T, Kudo T, Fujieda S, Fujibayashi Y (2009) Nucl Med Biol 36:419–426
Vāvere AL, Lewis JS (2008) Nucl Med Biol 35:273–279
Zhou J, Liu X, Chen Z-F, Liang H (2006) Chin J Synth Chem 14:471–475
Chumakov YM, Tsapkov V, Antosyak BY, Bairac N, Simonov YA, Bocelli G, Pahontu E, Gulea A (2009) Cryst Rep 54:455–463
Garbelini ER, Maria da Graça M, Back DF, Evans DJ, Müller-Santos M, Ribeiro RR, Lang ES, Nunes FS (2012) J Mol Struct 1008:35–41
Garbelini ER, Ribeiro RR, Hörner M, Locatelli A, Nunes FS (2011) Spectrochim Acta Pt A 78:1337–1341
Gulya A, Tsapkov V, Chumakov YM, Roshu T (2006) Russ J Gen Chem 76:1100–1105
Qing Y, Xiaoge B, Ligang Z, Hedong B, Hong L (2006) Chem J Inter 8:49
Shaabani B, Khandar AA, Dusek M, Pojarova M, Mahmoudi F, Feher A, Kajňaková M (2013) J Coord Chem 66:748–762
Basu S, Acharyya R, Basuli F, Peng S-M, Lee G-H, Mostafa G, Bhattacharya S (2010) Inorg Chim Acta 363:2848–2856
Tian Y-P, Wu J-Y, Xie F-X, Shanmuga Sundara Raj S, Yang P, Fun H-K (1999) Acta Crystallogr Sect C 55:1641–1644
Venkatachalam T, Pierens GK, Reutens DC (2014) Magn Reson Chem 52:98–105
Rigaku Oxford Diffraction, Version 171.38.43
Sheldrick GM (2008) Acta Crystallogr Sect A 64:112–122
Farrugia LJ (2012) J Appl Crystallogr 45:849–854
Spek A (2009) Acta Cryst D 65:148–155
Banks RE, Smart BE, Tatlow J (2013) Organofluorine chemistry: principles and commercial applications. Springer, Berlin
Müller K, Faeh C, Diederich F (2007) Science 317:1881–1886
Ojima I (2009) Fluorine in medicinal chemistry and chemical biology. Wiley, Chichester
Attia MI, Ghabbour HA, El-Azzouny AA, Al-Deeb OA, Almutairi MS, Fun H-K (2013) J Chem 2013
Bernhardt PV, Caldwell LM, Lovejoy DB, Richardson DR (2003) Acta Crystallogr Sect C 59:o629–o633
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This research work is partially supported by a Linkage Grant (LP130100703 for DCR) from Australian Research Council Australia.
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Venkatachalam, T.K., Bernhardt, P.V., Pierens, G.K. et al. Synthesis and X-ray Crystal Structure of 2 and 4-Trifluoromethyl Substituted Phenyl Semicarbazone and Thiosemicarbazone. J Chem Crystallogr 47, 30–39 (2017). https://doi.org/10.1007/s10870-017-0677-z
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DOI: https://doi.org/10.1007/s10870-017-0677-z