Thiophenes and their Benzo Derivatives: Structure

Spectroscopy, molecular structure, and electropolymerization of Ni(ii) and Cu(ii) complexes containing a thiophene-appending fluorinated Schiff base ligand

“…47 In both 5 and 6 , the extra absorption band observed at 700 cm −1 is assigned to the out-of-plane bending vibration mode of the C–H groups of the 2-thienyl unit. 52…”

“…47 In both 5 and 6, the extra absorption band observed at 700 cm −1 is assigned to the out-of-plane bending vibration mode of the C-H groups of the 2-thienyl unit. 52 The 1 H NMR spectrum of 3 (Fig. S5, ESI ‡) consists of two singlets at δ H 2.85 and 5.28 ppm and two doublets at δ H 6.83 and 7.34 ppm, with an integral ratio of 2 : 1 : 2 : 2 attributed to the methylene, methine, and p-phenylene protons, respectively.…”

Synthesis, structures, electrochemical and quantum chemical investigations of Ni(ii) and Cu(ii) complexes with a tetradentate Schiff base derived from 1-(2-thienyl)-1,3-butanedione

“…Finally, each compound showed a medium intensity band in the range 705-750 cm -1 assigned to the outof-plane bending vibration mode of the C-H groups of the 2-thiophenyl unit. 23 The 1 H NMR spectrum of compound 1 (Fig. S1, ESI † ) showed two sharp and one broad signals at H 2.11, 6.29 and 15.80 ppm with integral ratio 3:1:1 attributed to the methyl, methine and bridging enol protons, respectively.…”

Influence of structural changes on photophysical properties of terpyridine derivates: Experimental studies and theoretical calculations

“…34 Besides, the thienyl moiety in 2-stpy and 4-stpy was confirmed due to the presence of strong bands at 785 and 731 cm -1 and attributed to the out of plane bending vibration mode of the C-H groups present in this ligand. 35,36 M A N U S C R I P T…”