scholarly journals Oxido[2-{(E)-[((1E)-{(E)-2-[1-(2-oxidophenyl)ethylidene]hydrazin-1-ylidene}(prop-2-en-1-ylsulfanyl)methyl)imino]methyl}phenolato]vanadium(IV)

2012 ◽  
Vol 68 (8) ◽  
pp. m1033-m1034
Author(s):  
Reza Takjoo ◽  
Seik Weng Ng ◽  
Edward R. T. Tiekink
Keyword(s):  
Schiff Base ◽  
Dihedral Angle ◽  
Schiff Base Ligand ◽  
Title Complex ◽  
Coordination Geometry ◽  
Tetradentate Ligand ◽  
Π Interactions ◽  
Tetradentate Schiff Base ◽  
Apical Site ◽  
Supramolecular Chains

The VIVatom in the title complex, [V(C19H17N3O2S)O], is coordinated by two N and two O atoms of the dianionic tetradentate Schiff base ligand and the terminal oxide O atom. The N2O3donor set defines a square-pyramidal coordination geometry with the oxide O atom in the apical site. Some buckling in the tetradentate ligand is indicated by the dihedral angle of 17.92 (19)° between the six-membered chelate rings. Supramolecular chains are formed along thebaxisviaC—H...O contacts in the crystal. The chains are connected into a layer in theabplaneviaC—H...π interactions. The atoms comprising the –SCH2—CH=CH2and methyl substituents were found to be disordered in a 0.916 (2):0.088 (2) ratio. The crystal studied was found to be twinned by nonmerohedry with a 28.1 (4)% minor twin component.

scholarly journals Crystal structure of [2-({2-[(2-azanidylbenzylidene)amino]benzylidene}amino)-4-chlorophenolato]nickel(II)

2017 ◽  
Vol 73 (4) ◽  
pp. 637-639 ◽  
Author(s):  
Fumiya Kobayashi ◽  
Atsushi Koga ◽  
Ryo Ohtani ◽  
Shinya Hayami ◽  
Masaaki Nakamura
Keyword(s):  
Schiff Base ◽  
Schiff Base Ligand ◽  
Title Complex ◽  
Coordination Geometry ◽  
Π Interactions ◽  
Bond Forming ◽  
Tetradentate Schiff Base ◽  
Centroid Distance ◽  
Square Planar ◽  
A Chain

The title complex, [Ni(C20H14ClN3O)], with an asymmetrically chloride-appended Schiff base ligand has been synthesized and structurally characterized at 100 K. In the compound, the central nickel(II) ion has a square-planar coordination geometry with N3O donors of the π-conjugated tetradentate Schiff base ligand. In the crystal, the complexes are connected into an inversion dimerviaan Ni...Ni interaction [3.1753 (5) Å] and a pair of π–π interactions [centroid–centroid distance = 3.8416 (16) Å]. The dimers are linkedviaa C—H...Cl hydrogen bond, forming a chain along thec-axis direction. The dimer chains interact with each other through π–π interactions [centroid–centroid distance = 3.8736 (16) Å], forming a layer expanding parallel to theacplane.

scholarly journals {6,6′-Dimethyl-2,2′-bis[(2-oxidobenzylidene)amino]-1,1′-biphenyl-κ4O,N,N′,O′}bis(propan-2-olato-κO)titanium(IV)n-hexane hemisolvate

IUCrData ◽  
2016 ◽  
Vol 1 (9) ◽  
Author(s):  
Liang Chen ◽  
Xuebin Deng
Keyword(s):  
Schiff Base ◽  
Schiff Base Ligand ◽  
Title Complex ◽  
Octahedral Coordination ◽  
Coordination Geometry ◽  
Complex Molecules ◽  
Crystal Complex ◽  
Solvent Molecules

The mononuclear TiIVtitle complex, [Ti(C28H22N2O2)(C3H7O)2]·0.5C6H14, crystallizes as ann-hexane hemisolvate. The TiIVatom is coordinated by a dianionic tetradentate biphenyl Schiff base ligand and two O atoms of two propan-2-olate anions in a distorted TiN2O4octahedral coordination geometry, in which the two N atoms are in acisconfiguration. In the crystal, complex molecules are stacked parallel to [100], leaving space for channels parallel to [001] where the solvent molecules are located.

scholarly journals {4,4′-Dichloro-2,2′-[2,2-dimethylpropane-1,3-diylbis(nitrilomethanylylidene)]diphenolato}copper(II)

2012 ◽  
Vol 68 (8) ◽  
pp. m1135-m1135 ◽  
Author(s):  
Hadi Kargar ◽  
Reza Kia ◽  
Fatemeh Ganji ◽  
Valiollah Mirkhani
Keyword(s):  
Schiff Base ◽  
Hydrogen Bonds ◽  
Dihedral Angle ◽  
Schiff Base Complex ◽  
Tetradentate Ligand ◽  
Base Complex ◽  
Π Interactions ◽  
Centroid Distance ◽  
Square Planar ◽  
Benzene Rings

In the title Schiff base complex, [Cu(C19H18Cl2N2O2)], the CuIIion is coordinated in a distorted square-planar environment by two N atoms and two O atoms of the tetradentate ligand. The dihedral angle between the benzene rings is 36.86 (14)°. In the crystal, molecules are linked into inversion dimers by pairs of weak C—H...O hydrogen bonds. In addition, π–π [centroid–centroid distance = 3.7279 (16) Å] and weak C—H...π interactions are observed.

Synthesis, Characterisation and Antimicrobial Activity of Manganese(II), nickel(II), cobalt(II), Copper(II) and Zinc(II) Complexes of a Binucleating Tetradentate Ligand

2002 ◽  
Vol 2002 (11) ◽  
pp. 529-531 ◽  
Author(s):  
Abdou Saad El-Tabl
Keyword(s):  
Antimicrobial Activity ◽  
Schiff Base ◽  
Schiff Base Ligand ◽  
Magnetic Moment ◽  
Thermal Analyses ◽  
Antimicrobial Activities ◽  
Esr Spectra ◽  
Tetradentate Ligand ◽  
Tetradentate Schiff Base ◽  
Elemental Analyses

The binucleating, tetradentate Schiff base ligand (H2L) has been synthesised by condensation of bis-(4-aminophenyl)-methane with salicyladehyde. The resulting metal(II) complexes [metal = Mn||, Ni||, Co||, Cu|| and Zn||] have been characterised by elemental analyses, molar conductances, magnetic moment, IR, UV-vis spectra, thermal analyses (DTA and TGA) and ESR spectra. Antimicrobial activities of the ligand and its metal(II) complexes have been tested against different microorganisms. The electrochemical data of complexes (2), (9) and (10) are discussed.

Bis{2-[1-(benzylimino)ethyl]-5-methoxyphenol}dichlorozinc(II)

2006 ◽  
Vol 62 (7) ◽  
pp. m1548-m1549
Author(s):  
Xing-You Xu ◽  
Tong-Tao Xu ◽  
Shuai-Shuai Ni ◽  
Jian Gao ◽  
Da-Qi Wang
Keyword(s):  
Schiff Base ◽  
Hydrogen Bonds ◽  
Schiff Base Ligand ◽  
Title Complex ◽  
Hydroxyl Groups ◽  
Coordination Geometry ◽  
Tetrahedral Coordination ◽  
Intramolecular Hydrogen ◽  
Hydroxy Groups ◽  
Distorted Tetrahedral Coordination

The title complex, [ZnCl2(C16H17NO2)2], displays a distorted tetrahedral coordination geometry around the ZnII ion. The Schiff base inner salt, (benzylimino)ethyl-5-methoxyphenol, coordinates in a monodentate manner to the ZnII ion via the deprotonated hydroxy groups. The protonated imino groups form intramolecular hydrogen bonds with the deprotonated hydroxyl groups of the same Schiff base ligand.

Structure of a copper(II) complex with a non-symmetrical tetradentate Schiff base

1991 ◽  
Vol 56 (4) ◽  
pp. 858-864
Author(s):  
Bohumil Kratochvíl ◽  
Jan Ondráček ◽  
Jiří Novotný ◽  
Václav Haber
Keyword(s):  
Schiff Base ◽  
Hydrogen Bonds ◽  
Phenyl Ring ◽  
Complex Cation ◽  
Title Complex ◽  
Coordination Geometry ◽  
Space Group ◽  
Tetradentate Schiff Base ◽  
Fourier Techniques ◽  
Weak Hydrogen Bonds

The structure of (1-phenyl-3-{2-[(2-aminoethyl)amino]ethylimino}-1-buten-1-olato-O,N, N’,N”)-copper(II) perchlorate, [Cu(baden)]ClO4 was solved by Patterson and Fourier techniques and refined anisotropically to R = 0.066 for 2 205 unique observed reflections. The title complex (C14H20ClCuN3O5) crystallizes in the P21/c space group with the lattice parameters a = 10.435(1), b = 20.745(2), c = 8.457(1) Å, β = 108.56(1)°, Z = 4. The complex cation including the baden ligand contains two five-membered and one six-membered chelate rings, and the phenyl ring. The perchlorate anion is disordered. Two perchlorate oxygen positions, O22A and O33B, each with one half occupation factor value and four N3O donor atoms from the baden ligand complete the coordination geometry about the Cu atom on the square pyramid [Cu-O22A = 2.655(11)Å and Cu-O33B = 2.855(10)Å]. Weak hydrogen bonds among cations and anions were found in the structure.

scholarly journals {μ-2-[(3-Amino-2,2-dimethylpropyl)iminomethyl]-6-methoxyphenolato-1:2κ5O1,O6:N,N′,O1}{2-[(3-amino-2,2-dimethylpropyl)iminomethyl]-6-methoxyphenolato-1κ3N,N′,O1}-μ-azido-1:2κ2N:N-azido-2κN-methanol-2κO-dinickel(II)

2012 ◽  
Vol 68 (8) ◽  
pp. m1027-m1028
Author(s):  
Akbar Ghaemi ◽  
Saeed Rayati ◽  
Kazem Fayyazi ◽  
Seik Weng Ng ◽  
Edward R. T. Tiekink
Keyword(s):  
Hydrogen Bond ◽  
Schiff Base ◽  
Schiff Base Ligand ◽  
Crystal Packing ◽  
Tridentate Ligand ◽  
Coordination Geometry ◽  
Azide Ligand ◽  
Intramolecular Hydrogen ◽  
Supramolecular Chains ◽  
Pentadentate Ligand

Two distinct coordination geometries are found in the binuclear title complex, [Ni2(C13H19N2O2)2(N3)2(CH3OH)], as one Schiff base ligand is pentadentate, coordinatingviathe anticipated oxide O, imine N and amine N atoms (as for the second, tridentate, ligand) but the oxide O is bridging and coordination also occurs through the methoxy O atom. The NiIIatoms are linked by a μ2-oxide atom and one end of a μ2-azide ligand, forming an Ni2ON core. The coordination geometry for the NiIIatom coordinated by the tridentate ligand is completed by the methoxy O atom derived from the pentadentate ligand, with the resulting N3O3donor set defining afacoctahedron. The second NiIIatom has itscis-octahedral N4O2coordination geometry completed by the imine N and amine N atoms of the pentadentate Schiff base ligand, a terminally coordinated azide N and a methanol O atom. The arrangement is stabilized by an intramolecular hydrogen bond between the methanol H and the oxide O atom. Linear supramolecular chains along theaaxis are formed in the crystal packing whereby two amine H atoms from different amine atoms hydrogen bond to the terminal N atom of the monodentate azide ligand.

scholarly journals (Benzylthiolato-κS)phenylmercury(II)

IUCrData ◽  
2017 ◽  
Vol 2 (4) ◽  
Author(s):  
Paras Nath ◽  
Manoj K. Bharty ◽  
Sushil K. Gupta ◽  
Ray J. Butcher ◽  
Jerry P. Jasinski
Keyword(s):  
Crystal Structure ◽  
Dihedral Angle ◽  
Phenyl Ring ◽  
Three Dimensional ◽  
Title Complex ◽  
Coordination Geometry ◽  
Π Interactions ◽  
Dimensional Network ◽  
Phenyl Rings ◽  
Linear Coordination

The title complex, [Hg(C6H5)(C7H7S)], was synthesized from benzyl 4-methylpiperidine-1-carbodithioate. In the complex, the HgIIcation binds to a C atom of a phenyl ring and the S atom of a benzylthiolate ligand in a linear coordination geometry. The molecule is bent at the methylene C atom and the S atom, resulting in asynconformation with respect to the benzyl and phenyl rings. The dihedral angle between the phenyl and benzyl rings is 64.6 (2)°. The crystal structure is stabilized by intermolecular Hg...S [3.290 (3) Å] contacts and C—H...π interactions, generating a three-dimensional network.

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 (E)-4-Chloro-2-{[4-(dimethylamino)benzylidene]amino}phenol

2014 ◽  
Vol 70 (5) ◽  
pp. o603-o603
Author(s):  
Nadir Ghichi ◽  
Mohamed Amine Benaouida ◽  
Ali Benosmane ◽  
Ali Benboudiaf ◽  
Hocine Merazig
Keyword(s):  
Schiff Base ◽  
Dihedral Angle ◽  
Axis Direction ◽  
Π Interactions ◽  
Compound C ◽  
Benzene Rings ◽  
Amino Phenol ◽  
Schiff Base Compound ◽  
Supramolecular Chains ◽  
Base Compound

In the title aromatic Schiff base compound, C15H15ClN2O, the molecule exists in atransconformation with respect to the C=N bond. The dihedral angle between the benzene rings is 14.49 (6)°. In the crystal, weak C—H...π interactions link molecules into supramolecular chains propagated along thea-axis direction.

Sign in / Sign up

Export Citation Format

Share Document