Bis{2-[(2-hydroxy-2-methylpropyl)iminomethyl]-4-nitrophenolato}nickel(II) dimethylformamide monosolvate

Abstract

In the title compound, [Ni(C11H13N2O4)2]·C3H7NO, the NiII ion is octa­hedrally coordinated in an N2O4 environment by two identical Schiff base ligands. The Ni—O bond lengths range from 2.004 (2) to 2.106 (2) Å, while the Ni—N bond lengths are 2.038 (2) and 2.0465 (19) Å. The cis bond angles range from 78.64 (8) to 97.30 (8)°, with the former being due to the small bite of the amino­alcohol ligand, while the trans bond angles range from 167.86 (8) to 171.23 (8)°. One of the alcohol H atoms forms a hydrogen bond with the dimethyl­formamide (DMF) solvent mol­ecule, while the other links mol­ecules into chains along the b axis through inter­molecular O—H⋯O hydrogen bonds. There are bifurcated C—H⋯O inter­actions involving one of the nitro groups between parallel stacks of mol­ecules in the b-axis direction.

Structural and spectroscopic characterization of a new luminescent NiII complex: bis{2,4-dichloro-6-[(2-hydroxypropyl)iminomethyl]phenolato-κ3 O,N,O′}nickel(II)

“…The Ni II atom is six-coordinated by two phenolate O, two imine N and two hydroxy O atoms from two tridentate Schiff base ligands, forming a slightly elongated octahedral geometry. The Ni-O bond lengths range from 2.029 3 Table 2, and are typical and comparable with those observed in nickel(II) Schiff base complexes (Wang et al, 2011;Zhou et al, 2009;Ayikoé et al, 2011). In the crystal structure of (1), the aliphatic -OH group of the tridentate Schiff base ligand actively participates in intermolecular O-HÁ Á ÁO hydrogen bonds, connecting to one other unit and resulting in a one-dimensional chain along the b axis ( Fig.…”

The crystal structure of bis[(E)-4-bromo-2-({[2-(pyridin-2-yl)ethyl]imino}methyl)phenol]nickel(II) bis[(E)-4-bromo-2-({[2-(pyridin-2-yl)ethyl]imino}methyl)phenolato]nickel(II) bis(perchlorate) methanol monosolvate, a structure containing strong inter-species hydrogen bonds

“…It has been of great interest to catalyze a variety of reactions to mimic the catalytic efficiency of metalloenzymes. The crystal structures of related Ni II -Schiff base complexes have been reported (Ayikoé et al, 2011;Butcher et al, 2009;Elmali et al, 2000;Kobayashi et al, 2017;Kuchtanin et al, 2016;Okeke et al, 2017;Duran et al, 1989). Similar complexes have been studied in relation to catalytic redox reactions, catechol oxidase activity, and alkaline phosphatase reactivity (Ö zalp-Yaman et al, 2005;Sanyal et al, 2016;Bhardwaj & Singh, 2014).…”