Bivalent transition metal complexes of 4,5-diazafluorene-9-one benzoylhydrazone (HL) and the characterization of weak interaction in CoL 2 (H 2 O) 2

Tricarbonyl Rhenium(I) and Technetium(I) Complexes with Hydrazones Derived from 4,5‐Diazafluoren‐9‐one and 1,10‐Phenanthroline‐5,6‐dione

“…[38,39] All the complexes included in this work, irrespective of the conditions of synthesis, present signals in the 1 H NMR spectra attributable to a single species. The assignment of the signals has been performed on the basis of previously published data for L 3 and L 4 [40][41][42] or in similar systems for L 5 and L 6 . [25,32,34,43] The 1 H NMR spectra can readily be used to ensure the coordination mode of the hydrazone ligands in the rhenium complexes under study.…”

Synthesis, characterization and crystal structures of Ni(II), Cd(II) complexes withN-(2-propionic acid)-salicyloyl hydrazone and bipy/phen

“…Acyl hydrazone ligands bearing both nitrogen and oxygen donors which exhibit both hard and soft base character could form more stable complexes than polyoxa or polyaza ligands [5]. Aroyl hydrazones have been the subject of investigation due to their versatile chelating behavior, coordinating in the keto form, dehydrogenation conjugation and enol form [6][7][8][9][10]. The valence of acyl hydrazone is multiple [11][12][13][14][15]; N-(2-propionic acid)-salicyloyl hydrazone has potential H-bonding sites.…”