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Bis(4-chloro-2-formyl-phenolato)nickel(II).

ABSTRACT: The asymmetric unit of the title compound, [Ni(C(7)H(4)ClO(2))(2)], contains one half-mol-ecule. The Ni(II) ion, lying on an inversion centre, is four-coordinated by O atoms of 5-chloro-salicylaldehydate ligands in a square-planar geometry.

SUBMITTER: Li Z

PROVIDER: S-EPMC2924215 | biostudies-literature |

REPOSITORIES: biostudies-literature

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Bis[4-chloro-2-(iminomethyl)phenolato]nickel(II).

Project description:In the title centrosymmetric mononuclear nickel(II) complex, [Ni(C(7)H(5)ClNO)(2)], the Ni(II) ion, lying on an inversion center, is four-coordinated by two O and two imine N atoms from two 4-chloro-2-imino-methyl-phenolate ligands, forming a distorted square-planar geometry. In the crystal structure, mol-ecules are linked into a two-dimensional network parallel to the bc plane by C-H?O hydrogen bonds.

| S-EPMC2968681 | biostudies-literature

Redetermination of bis-(2-formyl-phenolato-κO,O')nickel(II) as bis-[2-(imino-meth-yl)phenolato-κN,O']nickel(II).

Project description:The crystal structure of bis-(2-formyl-phenolato-κ(2)O,O')nickel(II), [Ni(C(7)H(5)O(2))(2)], a square-planar centrosymmetric complex, has been reported previously [Li & Chen (2006). Acta Cryst. E62, m1038-m1039]. However, a number of warning signs allows the assumption that the carbonyl group in the salicylaldehydate ligand of the claimed complex is incorrect. The crystal structure was therefore redetermined on basis of the originally deposited structure factors. After substituting the carbonyl O atom by an N atom, the model can be completed with an imine H atom, which was clearly discernible in a difference map. The resulting model, corresponding to bis-[2-(imino-meth-yl)phenolato-κ(2)N,O']nickel(II), [Ni(C(7)H(6)NO)(2)], converges well and none of the previous structural alerts remains. This reinter-pretation is also consistent with the published synthesis, which was carried out using salicylaldehyde in the presence of aqueous NH(3). The reinter-preted structure is virtually identical to earlier reports dealing with this bis-iminato Ni(II) complex.

| S-EPMC2979995 | biostudies-literature

Bis(2-eth-oxy-6-formyl-phenolato-κO,O)nickel(II).

Project description:The title compound, [Ni(C(9)H(9)O(3))(2)], was synthesized by the reaction of 3-ethoxy-salicylaldehyde with nickel(II) nitrate in methanol solution. The asymmetric unit onsists of two half-molecules; each Ni atom lies on a centre of symmetry. The Ni(II) ions are coordinated by four O atoms from two deprotonated 3-ethoxy-salicylaldehyde ligands in a slightly distorted square-planar coordination environment.

| S-EPMC2960901 | biostudies-literature

Bis[2-(benzyl-amino)-pyridine-κN]bis-(2-formyl-phenolato-κO,O')nickel(II).

Project description:In the title complex, [Ni(C(7)H(5)O(2))(2)(C(12)H(12)N(2))(2)], the Ni(II) atom lies on a center of inversion and is coordinated in an octa-hedral geometry by two 2-(benzyl-amino)-pyridine (2-BAP) and two 2-formyl-phenolate ligands with the O-atom donors in the equatorial plane and the pyridine N atoms in axial positions. There are hydrogen-bonding inter-actions between the secondary amine H atom and the phenolate O atom, as well as C-H⋯O inter-actions, which result in the dihedral angle between the aromatic phenyl ring of the 2-formyl-phenolate moiety and the pyridine ring being 80.23 (4)°. In the packing, there are both C-H⋯π inter-actions, which link the mol-ecules into chains along the b axis, and offset π-π inter-actions involving both the pyridine and phenyl rings of the 2-BAP ligands [centroid-centroid distances = 4.0100 (8) Å for the pyridine rings and 3.6601 (8) and 4.8561 (8) Å for the phenyl rings].

| S-EPMC3051610 | biostudies-literature

Diaqua-bis(2,4-dichloro-6-formyl-phenolato)zinc(II)-bis-(?-2,4-dichloro-6-formyl-phenolato)bis-[aqua-(2,4-dichloro-6-formyl-phenolato)zinc(II)] (2/1).

Project description:The crystal of the title compound, [Zn(C(7)H(3)Cl(2)O(2))(2)(H(2)O)(2)](2)·[Zn(2)(C(7)H(3)Cl(2)O(2))(4)(H(2)O)(2)], consists of monomeric and dimeric Zn(II) complexes. Both complexes afford a six-coordinated coordination environment about the Zn atoms with cis-configuration ligands. The deprotonated hydr-oxy groups of the 3,5-dichloro-salicylaldehyde ligands bridge two metal cations, forming a centrosymmetric dimeric complex. Inter-molecular O-H?O hydrogen bonding occurs between the coordinated water mol-ecules and deprotonated hydr-oxy groups in the crystal structure.

| S-EPMC2972068 | biostudies-literature

Bis{4-chloro-6-formyl-2-[(E)-2-(1H-imidazol-4-yl-κN)ethyl-imino-methyl-κN]phenolato-κO}nickel(II).

Project description:In the title compound, [Ni(C(13)H(11)ClN(3)O(2))(2)], the Ni(II) atom is located on a twofold rotation axis and is six-coordinated by four N atoms and two phenolate O atoms from the two equal Schiff base ligands in a distorted octa-hedral coordination geometry. The complex mol-ecules are connected by C-H⋯Cl, C-H⋯O and N-H⋯O hydrogen bonds.

| S-EPMC2959577 | biostudies-literature

Bis[(E)-4-chloro-2-(cyclo-hexyl-imino-meth-yl)phenolato]nickel(II).

Project description:In the title mononuclear nickel(II) complex, [Ni(C(13)H(15)ClNO)(2)], the Ni(II) atom is four-coordinated in a tetra-hedral geometry by the N and O atoms of the two Schiff base ligands.

| S-EPMC2961407 | biostudies-literature

Bis[2-(benzyl-imino-meth-yl)-4-chloro-phenolato-κN,O]nickel(II).

Project description:In the mononuclear centrosymmetric title compound, [Ni(C(14)H(11)ClNO)(2)], the Ni(II) atom, lying on a center of symmetry, is four-coordinated by two O atoms and two N atoms from two Schiff base ligands, forming a slightly distorted square-planar environment. The dihedral angle between the two aromatic rings of the ligand is 72.0 (2)°. No significant hydrogen bonding or π-π stacking inter-actions are observed.

| S-EPMC2915132 | biostudies-literature

Bis{?-2-[(pyridin-2-yl)imino-meth-yl]phenolato}bis-[(2-formyl-phenolato)copper(II)].

Project description:The asymmetric unit of the title compound, [Cu(2)(C(12)H(9)N(2)O)(2)(C(7)H(5)O(2))(2)], contains two independent (2-formyl-phen-olato){2-[(pyridin-2-yl)imino-meth-yl]phenolato}copper(II) mol-ecules that form pseudocentrosymmetric dimers via inter-actions between the Cu and pyridyl N atoms of independent monomers. The square-planar geometry of the Cu atoms in the monomer thus becomes square-based pyramidal in the dimer. The crystal studied was an inversion twin, with unequal populations of 0.353?(17) and 0.647?(17).

| S-EPMC3120375 | biostudies-literature

Bis{2-formyl-4-methyl-6-[(tri-2-pyridyl-meth-yl)imino-meth-yl]phenolato}nickel(II).

Project description:The title compound, [Ni(C(25)H(19)N(4)O(2))(2)], which was obtained by the reaction of nickel(II) perchlorate with 2,6-diformyl-4-methyl-phenol and (tri-2-pyridylmeth-yl)amine in methanol solution, is a discrete monometallic complex. The Ni(II) atom is six-coordinated by the phenolate O, imine N and pyridine N atoms from two tridentate Schiff base ligands in a distorted NiN(4)O(2) octa-hedral geometry. The dihedral angles between the noncoordinated pyridyl rings of each ligand are 72.95?(8) and 69.59?(7)°.

| S-EPMC2968412 | biostudies-literature

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