Bis{2-amino-2-oxo-N-[(1E)-1-(pyridin-2-yl-κN)ethylidene]acetohydrazidato-κ²N′,O¹}nickel(II)

Abstract

In the title compound, [Ni(C9H9N4O2)2], the NiII ion is situated on a twofold rotation axis and is coordinated by two O and four N atoms from two tridentate {2-amino-2-oxo-N-[(1E)-1-(pyridin-2-yl-κN)ethyl­idene]acetohydrazidate ligands in a distorted octa­hedral geometry. In the crystal, N—H⋯O and N—H⋯N hydrogen bonds link the mol­ecules into columns in [001]. The porous crystal packing is further stabilized via π–π inter­actions between the pyridine rings of neighbouring mol­ecules [centroid–centroid distance = 3.746 (3) Å] with voids of 270 Å3.

Synthesis of Schiff Bases Compounds from Oxamic Hydrazide: Spectroscopic Characterization, X–ray Diffraction Structure and Antioxidant Activity Study

“…Selected bond distances and angles are listed in Table 2. observed for similar compounds which crystallize in their keto forms [37,7]. Those distances are comparable to the values found for a derivative which has an oxalate group [38].…”

“…The properties of these complexes are evaluated in superoxide catalysis [2,3] and magnetism [26]. It is in this perspective that we have studied these types of ligands and reported their transition metal complexes [7,27]. Continuing our work in this field, we obtained ligands (I) and (II).…”

“…Oxamic hydrazide has two different arms. The hydrazide arm condenses more easily than the amide arm with carbonyl [7][8][9][10]. The use of these ligands has made it possible to prepare coordination compounds with atypical structures [11][12][13].…”

Synthesis and Crystal Structure of Anickel (II) and Zinc (II) Complex From 1,5-Bis [(2-Thiophenyl) Methylidene] Thiocarbonohydrazide

“…The molecular design can be modulated to link in different manners metal ions resulting in original architectures. In the course of our studies on the chemistry of transition metal compounds, we have prepared and characterized a number of chelates containing N and O donor sites [11][12][13][14][15]. Considerable interest is accorded to the development of multidentate ligands containing different binding sites such as N, O or S [16,17].…”