Two different structures controlled by small secondary ligands: {4-chloro-2-[2-(dimethylamino)ethyliminomethyl]phenolato}thiocyanatonickel(II) and<i>catena</i>-poly[[{4-chloro-2-[2-(dimethylamino)ethyliminomethyl]phenolato}nickel(II)]-μ-azido]

Sun, Yuxi

doi:10.1107/s0108270106003118

Cited by 3 publications

(1 citation statement)

References 9 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The Ni atom in the complex is in a square planar coordination configuration and is fourcoordinated by the phenolate O, imine N, and amine N atoms (2) to 179.0(1) • , respectively, as a result from the strain created by the five-membered chelate ring Ni1/N1/C8/C9/N2. The Ni N and Ni O bond lengths are in agreement with those found previously in similar nickel(II) complexes [9,18,19] and, as expected, the bond involving amine N atom is longer than that involving imine N atom. The thiocyanate ligand is nearly linear and show bent coordination mode with the metal atom.…”

Section: Structure Description Of (1)supporting

confidence: 90%

Syntheses, Characterization, and Crystal Structures of Nickel Complexes Derived From Tridentate Schiff Bases and Thiocyanate Mixed Ligands

Yuan

2013

Synthesis and Reactivity in Inorganic, Metal-Organic, and Nano-

View full text Add to dashboard Cite

The self-assembly and construction of specific Schiff base nickel complexes are important in the exploration of new functional materials. In the present work, in the presence of thiocyanate ligands, two mononuclear Schiff base nickel(II) com- plexes, [NiL1(NCS)] (1) and [Ni(L2) 2 ] (2) (L1 = 2-bromo-6-[ (2-dimethylaminoethylimino)methyl]phenolate, L2 = 2-bromo-6-[(3-dimethylaminopropylimino)methyl]phenolate), with different coordination modes, have been synthesized and characterized by elemental analysis, IR spectra, and single-crystal X-ray diffraction. The Ni atom in (1) is four-coordinated in a square planar configuration, with three donor atoms of L1 and one nitrogen atom of thiocyanate ligand. The Ni atom in (2) is six-coordinated in an octahedral configuration, with six donor atoms from two L2 ligands.The relationship between the ligands and the final structures of the complexes is discussed.

show abstract

Section: Structure Description Of (1)supporting

confidence: 90%

Syntheses, Characterization, and Crystal Structures of Nickel Complexes Derived From Tridentate Schiff Bases and Thiocyanate Mixed Ligands

Yuan

2013

Synthesis and Reactivity in Inorganic, Metal-Organic, and Nano-

View full text Add to dashboard Cite

show abstract

Square planar complexes of Cu(II) and Ni(II) with N2O donor set of two Schiff base ligands: synthesis and structural aspects

et al. 2007

View full text Add to dashboard Cite

Two new square planar Cu(II) and Ni(II) complexes, [CuL 1 (NCO)] (1) and [NiL 2 (N 3 )] (2) have been synthesized with two different tridentate N 2 O donor Schiff base ligands L 1 H (1:1 condensation product of benzoylacetone and 2-diethylaminoethylamine) and L 2 H (1:1 condensation product of benzoylacetone and 2-dimethylaminoethylamine), respectively. Both the complexes 1 and 2 have been characterized by elemental analysis, IR, UVVis spectroscopy, room temperature magnetic susceptibility measurement, electrochemical, thermal, and single crystal X-ray diffraction studies. Structural studies reveal that in both the complexes metal centers have square planar environment with N 2 O donor set of Schiff base ligands and terminal pseudohalide anions (isocyanate for 1 and azide for 2) at four coordination sites of square plane.

show abstract

Synthesis, Crystal Structures, Magnetic Properties and Catecholase Activity of Double Phenoxido-Bridged Penta-Coordinated Dinuclear Nickel(II) Complexes Derived from Reduced Schiff-Base Ligands: Mechanistic Inference of Catecholase Activity

et al. 2012

View full text Add to dashboard Cite

Three double phenoxido-bridged dinuclear nickel(II) complexes, namely [Ni(2)(L(1))(2)(NCS)(2)] (1), [Ni(2)(L(2))(2)(NCS)(2)] (2), and [Ni(2)(L(3))(2)(NCS)(2)] (3) have been synthesized using the reduced tridentate Schiff-base ligands 2-[1-(3-methylamino-propylamino)-ethyl]-phenol (HL(1)), 2-[1-(2-dimethylamino-ethylamino)-ethyl]-phenol (HL(2)), and 2-[1-(3-dimethylamino-propylamino)-ethyl]-phenol (HL(3)), respectively. The coordination compounds have been characterized by X-ray structural analyses, magnetic-susceptibility measurements, and various spectroscopic methods. In all complexes, the nickel(II) ions are penta-coordinated in a square-pyramidal environment, which is severely distorted in the case of 1 (Addison parameter τ = 0.47) and 3 (τ = 0.29), while it is almost perfect for 2 (τ = 0.03). This arrangement leads to relatively strong antiferromagnetic interactions between the Ni(II) (S = 1) metal centers as mediated by double phenoxido bridges (with J values of -23.32 (1), -35.45 (2), and -34.02 (3) cm(3) K mol(-1), in the convention H = -2JS(1)S(2)). The catalytic activity of these Ni compounds has been investigated for the aerial oxidation of 3,5-di-tert-butylcatechol. Kinetic data analysis following Michaelis-Menten treatment reveals that the catecholase activity of the complexes is influenced by the flexibility of the ligand and also by the geometry around the metal ion. Electrospray ionization mass spectroscopy (ESI-MS) studies (in the positive mode) have been performed for all the coordination compounds in the presence of 3,5-DTBC to characterize potential complex-substrate intermediates. The mass-spectrometry data, corroborated by electron paramagnetic resonance (EPR) measurements, suggest that the metal centers are involved in the catecholase activity exhibited by the complexes.

show abstract

Two different structures controlled by small secondary ligands: {4-chloro-2-[2-(dimethylamino)ethyliminomethyl]phenolato}thiocyanatonickel(II) andcatena-poly[[{4-chloro-2-[2-(dimethylamino)ethyliminomethyl]phenolato}nickel(II)]-μ-azido]

Cited by 3 publications

References 9 publications

Syntheses, Characterization, and Crystal Structures of Nickel Complexes Derived From Tridentate Schiff Bases and Thiocyanate Mixed Ligands

Syntheses, Characterization, and Crystal Structures of Nickel Complexes Derived From Tridentate Schiff Bases and Thiocyanate Mixed Ligands

Square planar complexes of Cu(II) and Ni(II) with N2O donor set of two Schiff base ligands: synthesis and structural aspects

Synthesis, Crystal Structures, Magnetic Properties and Catecholase Activity of Double Phenoxido-Bridged Penta-Coordinated Dinuclear Nickel(II) Complexes Derived from Reduced Schiff-Base Ligands: Mechanistic Inference of Catecholase Activity

Contact Info

Product

Resources

About