Photoluminescence properties of a cationic trinuclear zinc(II) complex with the tetradentate Schiff base ligand 6-methyl-2-({[(pyridin-2-yl)methyl]imino}methyl)phenolate

2015 ◽  
Vol 71 (10) ◽  
pp. 908-911 ◽  
Author(s):  
Young-Inn Kim ◽  
Young-Kwang Song ◽  
Daeyoung Kim ◽  
Sung Kwon Kang
Keyword(s):  
Schiff Base ◽  
Metal Cluster ◽  
Title Complex ◽  
Photoluminescence Properties ◽  
Schiff Base Ligands ◽  
Tetrahedral Geometry ◽  
Strong Emission ◽  
Tetradentate Schiff Base ◽  
Distorted Octahedral ◽  
Phenolate Ligands

Metal complexes with Schiff base ligands have been suggested as potential phosphors in electroluminescent devices. In the title complex, tetrakis[6-methyl-2-({[(pyridin-2-yl)methyl]imino}methyl)phenolato-1:2κ8N,N′,O:O;3:2κ8N,N′,O:O]trizinc(II) hexafluoridophosphate methanol monosolvate, [Zn3(C14H13N2O)4](PF6)2·CH3OH, the ZnIIcations adopt both six- and four-coordinate geometries involving the N and O atoms of tetradentate 6-methyl-2-({[(pyridin-2-yl)methyl]imino}methyl)phenolate ligands. Two terminal ZnIIcations adopt distorted octahedral geometries and the central ZnIIcation adopts a distorted tetrahedral geometry. The O atoms of the phenolate ligands bridge three ZnIIcations, forming a dicationic trinuclear metal cluster. The title complex exhibits a strong emission at 469 nm with a quantum yield of 15.5%.

Vanadium(III) chloro and bromo complexes with tetradentate Schiff base ligands

1973 ◽  
Vol 26 (5) ◽  
pp. 991 ◽  
Author(s):  
KS Murray ◽  
GR Simm ◽  
BO West
Keyword(s):  
Schiff Base ◽  
Spectral Properties ◽  
Schiff Base Ligands ◽  
Tetradentate Schiff Base ◽  
Distorted Octahedral

Vanadium(III) Schiff base chelates of the types V(chel)Cl,py (chel = saen, saph) and V(saen)Cl,py2 have been synthesized by allowing VCl3 and the ligand to react in pyridine solutions. The bromo derivatives V(saen)Br,py and V(saph)Br,py2 can be obtained by LiBr substitution. The magnetic and spectral properties of the complexes are consistent with tetragonally distorted octahedral structures, though the μeff value for V(saen)Cl,py is slightly lower than expected and difficult to explain with certainty.

scholarly journals Bis(dimethylamido-κN)bis[2-(pyrrol-2-ylmethyleneamino)-2′-methoxy-6,6′-dimethyl-1,1′-biphenyl-κ2N,N′]vanadium(IV) toluene monosolvate

IUCrData ◽  
2016 ◽  
Vol 1 (9) ◽  
Author(s):  
Qiuwen Wang ◽  
Yihan Xiong ◽  
Xuebin Deng
Keyword(s):  
Schiff Base ◽  
Schiff Base Ligand ◽  
Title Complex ◽  
Octahedral Coordination ◽  
Coordination Geometry ◽  
Schiff Base Ligands ◽  
Distorted Octahedral Coordination ◽  
Distorted Octahedral Coordination Geometry ◽  
Distorted Octahedral

Reaction of the Schiff base ligand (R)-2-(pyrrol-2-ylmethyleneamino)-2′-methoxy-6,6′-dimethyl-1,1′-biphenyl with tetrakis(dimethylamido)vanadium in toluene gives the mononuclear VIVtitle complex, [V(C2H6N)2(C20H19N2O)2]·C7H8, which was isolated as red crystals. The VIVcation is coordinated by two monoanionic bidentate Schiff base ligands and two N atoms of two dimethylamide anions in a VN6distorted octahedral coordination geometry, in which two N atoms from the dimethylamide anions are placed in acis-configuration.

scholarly journals Bis[tetrakis(pyridin-2-yl)methane-κ3N,N′,N′′]cobalt(II) tetrakis(thiocyanato-κN)cobaltate(II) methanol monosolvate

2014 ◽  
Vol 70 (3) ◽  
pp. m96-m97 ◽  
Author(s):  
Yuya Tsunezumi ◽  
Kouzou Matsumoto ◽  
Shinya Hayami ◽  
Akira Fuyuhiro ◽  
Satoshi Kawata
Keyword(s):  
Complex Anion ◽  
Complex Cation ◽  
Solvent Molecule ◽  
Octahedral Geometry ◽  
Title Complex ◽  
Distorted Octahedral Geometry ◽  
Weak Hydrogen Bond ◽  
Tetrahedral Geometry ◽  
Distorted Tetrahedral Geometry ◽  
Distorted Octahedral

The title complex, [Co(C21H16N4)2][Co(NCS)4]·CH3OH, consists of one [Co{C(py)4}2]2+complex cation [C(py)4= tetrakis(pyridin-2-yl)methane], one [Co(NCS)4]2−complex anion and a methanol solvent molecule. In the cation, the CoIIatom is coordinated by six N atoms of two C(py)4ligands in a distorted octahedral geometry. In the anion, the CoIIatom is coordinated by the N atoms of four NCS−ligands in a distorted tetrahedral geometry. The methanol molecule is disordered and was modelled over three orientations (occupancies 0.8:0.1:0.1). There are two weak hydrogen-bond-like interactions between the methanol solvent molecule and NCS−ligands of the anion [O...S = 3.283 (3) and 3.170 (2) Å].

scholarly journals Crystal structure of bis(2-{1-[(E)-(4-fluorobenzyl)imino]ethyl}phenolato-κ2N,O)palladium(II)

2015 ◽  
Vol 71 (4) ◽  
pp. 350-353
Author(s):  
Amalina Mohd Tajuddin ◽  
Hadariah Bahron ◽  
Hamizah Mohd Zaki ◽  
Karimah Kassim ◽  
Suchada Chantrapromma
Keyword(s):  
Crystal Structure ◽  
Schiff Base ◽  
Hydrogen Bonds ◽  
Dihedral Angle ◽  
Title Complex ◽  
Asymmetric Unit ◽  
Schiff Base Ligands ◽  
Bond Lengths ◽  
Square Planar ◽  
Coordination Plane

The asymmetric unit of the title complex, [Pd(C15H13FNO)2], contains one half of the molecule with the PdIIcation lying on an inversion centre and is coordinated by the bidentate Schiff base anion. The geometry around the cationic PdIIcentre is distorted square planar, chelated by the imine N- and phenolate O-donor atoms of the two Schiff base ligands. The N- and O-donor atoms of the two ligands are mutuallytrans, with Pd—N and Pd—O bond lengths of 2.028 (2) and 1.9770 (18) Å, respectively. The fluorophenyl ring is tilted away from the coordination plane and makes a dihedral angle of 66.2 (2)° with the phenolate ring. In the crystal, molecules are linked into chains along the [101] direction by weak C—H...O hydrogen bonds. Weak π–π interactions with centroid–centroid distances of 4.079 (2) Å stack the molecules alongc.

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