{4-Bromo-2-[2-(5-bromo-2-oxidobenzylideneaminomethyl)phenyliminomethyl]phenolato-κ⁴O,N,N′,O′}nickel(II)

Abstract

In the title complex, [Ni(C(21)H(14)Br(2)N(2)O(2))], the Ni(II) atom is coordinated by the two imine N and two phenolate O atoms of the Schiff base ligand in a tetrahedrally distorted square-planar geometry. The Ni-N and Ni-O distances are within the ranges expected for Ni-Schiff base derivatives. Intermolecular C-H...O hydrogen bonds link the molecules into centrosymmetric dimers, forming R(2)(2)(12) (A) and R(2)(2)(10) (B) rings. These dimers combine to form a supramolecular ABAB... aggregate which propagates along the [100] direction.

Azido{2,4-dichloro-6-[2-(diethylamino)ethyliminomethyl]phenolato}nickel(II)

“…The Ni atom in mononuclear (I) is four-coordinated by an imine N, an amine N, a phenolate O atom derived from the Schiff base and a terminal N atom of the azide anion, giving a square planar geometry. The Ni-ligand bond lengths (Table 1) are shorter than the corresponding values observed in isostructural (II), and within the ranges expected for Ni-Schiff base structures (de Castro et al, 2001;Chakraborty et al, 2004;Wei, 2005). The bond angles around the central metal in (I) are comparable to those in (II), and also show some deviations from ideal square-planar geometry (Table 1).…”

Bis{1-[3-(cyclohexylaminio)propyliminomethyl]-2-naphtholato}nickel(II) dichloride 1.24-hydrate

“…The Ni II atom is four-coordinated in a square-planar geometry by two imine N and two phenolate O atoms from two Schiff bases. All bond angles (Table 1) subtended at the Ni II centre are comparable with the values observed in other Schiff base nickel(II) complexes (Gomes et al, 2000;Chakraborty et al, 2004). (Table 2), forming layers parallel to the bc plane (Fig.…”

Interactions between dimers of {1,1′-[o-phenylenebis(nitrilomethylidyne)]di-2-naphtholato-κ4O,N,N′,O′}nickel(II)

“…Such NiÁ Á ÁNi interactions are weaker than most covalent or ionic bonds, but they are stronger than other van der Waals interactions, and are roughly comparable in strength to typical hydrogen bonds (Pyykkö, 1997). Similar NiÁ Á ÁNi distances [NiÁ Á ÁNi = 3.3244 (4) Å ] are found in a naphthaldimine nickel(II) complex with an aliphatic bridging diamine unit (Akhtar, 1981) and in a range of analogous nickel Schiff base complexes [3.201 (1)-3.582 (1) Å ] with metal-metal interactions (Chakraborty et al, 2004).…”