Ru(II)–DMSO complexes containing aromatic and heterocyclic acid hydrazides: Structure, electrochemistry and biological activity

Spectroscopic characterization and molecular modeling of novel palladium(II) complexes with carbazates and hydrazides

“…A downfield shift was observed in the spectra of the complexes (for instance, d 6.51 for [Pd(BC) 2 Cl 2 ]) indicating the coordination of the NH 2 nitrogen to palladium(II) ion. The signal of the NH proton was much less affected when compared to the group NH 2 protons excluding the participation of this group in the coordination [10]. Signals of lower intensity in the spectra are assigned to partial solvolysis of the complexes in DMSO, in accordance with results previously published [30].…”

“…In addition, the formation of metallic complexes plays an important role in the improvement of their biological activities [4][5][6]. Indeed, many complexes containing hydrazides exhibit remarkable biological properties [7][8][9][10][11][12][13][14][15][16]. Recently, the effect of copper(II) complexes with 2-furoic acid hydrazide or 2-thiophenecarboxylic acid hydrazide on the growth of tumoral cells was studied.…”

Structure and vibrational IR spectra of a UCl4⋅2DMSO complex

“…Dimethylsulfoxide (DMSO) occupies a special place among polar organic solvents containing C=O, S=O, or P=O electron-donating groups and; consequently, tending to form coordination complexes. In contrast with dimethylformamide (DMF), hexamethylphosphoramide (HMPA), and other compounds, DMSO can coordinate to the central metal atom in certain instances not only through the O atom but also through the S atom [1][2][3][4][5]. The latter type of coordination is accompanied by a short-wavelength shift of the S=O stretching vibrational frequency whereas coordination of the former type shifts the frequency to longer wavelength.…”

A New Complex of Palladium(II) With 2-Furoic Hydrazide: Synthesis, Characterization, Theoretical Calculations and Biological Studies

“…This signal has been shifted downfield in the complex ( 6.91) and this result suggests that the nitrogen of the NH 2 group is involved in the coordination sphere. 8 The complex shows a singlet near at  9.60 ppm due to the NH proton. The signal of the NH proton was much less affected when compared to the group NH 2 protons excluding the participation this group in the coordination.…”