Spectral, magnetic, thermal, antimicrobial, and eukaryotic DNA studies on acetone [N-(3-hydroxy-2-naphthoyl)]hydrazone complexes

Computational simulation and biological studies on 3-(2-(2-hydroxybenzoyl)hydrazono)-N-(pyridine-2-yl)butanamide complexes

“…The bands located at 3295, 3231, 3173 and 2994 cm À1 are attributed to y(OH) phenolic , y(NH) 1 , y(NH) 2 , and y(CH 2 ) [31]. The appearance of hydroxyl group as a broad band at lower wave number and the two weak broad bands at 1910e2082 and 2153e2231 cm À1 regions proposed the occurrence of intramolecular hydrogen bonding (OeH$$$N) [32].…”

Ball milling: a green mechanochemical approach for synthesis of Ni (II), Co (II) and Cu (II) complexes

“…In [Co(D 1 )(OAc)(H 2 O) 2 ]·2H 2 O, [Ni(D 1 ) 2 (OAc)(H 2 O) 2 ]·2H 2 O and [Cu(D 3 )(OAc)] complexes, (H 2 D) 1 and (H 2 D) 3 behaved as mononegative bidentate ligands coordinating via the carbonyl oxygen (C=O) 2 and the deprotonated enolized carbonyl oxygen (=C–O − ) 1 . This mode of chelation was suggested by the disappearance of υ(C=O) 1 and υ(NH), with simultaneous appearance of new bands at (1179, 1193, 1170) and (1591, 1590, 1597) cm −1 that were assignable to υ(C–O) 1(enolic) and υ(C=N), respectively, and also by the shift of (C=O) 2 to lower wavenumbers and the appearance of new bands at (525, 511, 528) cm −1 that were attributed to υ(M–O) …”

3‐(2‐(2‐Oxo‐2H‐chromene‐3‐carbonyl)hydrazono)‐N‐(pyridin‐2‐yl)butanamide Complexes: Synthesis, Characterization, DFT, Biological, and Ion‐flotation studies

“…The observed bands in the IR spectrum of H2L are listed in Table . The bands appeared at 3285, 3180, 3051, 1750, 1655, 1675, 1603, and 689 cm −1 are assigned to υ(NH) 1 , υ(NH) 2 , υ(CH2, υ(C=O)1, υ(C=O) 2 , υ(C=O) 3 , υ(C=N), and υ(C=N) py . Also, in H 2 L 1 H NMR spectrum, there are two main signals at 11.27 and 12.23 ppm ascribed to the (NH)1 and (NH)2 protons, respectively (Scheme S1).…”