A novel nine-membered intramolecular hydrogen bonding in methyl naphthoate bearing phenol moiety
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2017, Spectrochimica Acta - Part A: Molecular and Biomolecular SpectroscopyCitation Excerpt :The atoms of the thiosemicarbazide fragment were identified using 1H, 13C-HSQC, 1H, 13C-HMBC and 1H, 15N-HMBC data (Fig. 2). Thiosemicarbazones possess the unique capability of forming Z and E isomers [26,27]. A number of authors have noted that compounds possessing a Z isomer generally exhibit a NH-3 signal in the 14–15 ppm range, whereas those compounds possessing an E form display a signal in the 9–12 ppm range [28].
Influence of anthraquinone scaffold on E/Z isomer distribution of two thiosemicarbazone derivatives. 2D NMR and DFT studies
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