نتایج جستجو برای: isatin schiff bases

تعداد نتایج: 72718  

2008
Hang-Ming Guo Hong Lin

The centrosymmetric title complex, [Ni(C(13)H(19)N(2)O(2))(2)], is a mononuclear nickel(II) complex. The Ni(II) atom is coordinated by four N atoms and two O atoms of two deprotonated Schiff base ligands, forming a slightly distorted octa-hedral coordination configuration, in which the tertiary N atoms occupy the axial positions.

2012
Hadi Kargar Reza Kia Muhammad Nawaz Tahir

The asymmetric unit of the title compound, C(28)H(22)Br(2)N(2)O(2)S(2), comprises half of a Schiff base ligand, the whole mol-ecule being generated by a crystallographic inversion center located at the mid-point of the C-C bond of the central methyl-ene segment. Intra-molecular O-H⋯N and O-H⋯S hydrogen bonds make S(6) and S(5) ring motifs, respectively. In the crystal, there are no significant ...

2008
Grzegorz Romanowski Artur Sikorski Andrzej Wojtczak

In the title dinuclear compound, [V(2)(C(15)H(17)N(2)O)(2)O(4)], each V(V) atom is six-coordinated by one oxide group, and by two N and one O atom of the tridentate Schiff base ligand, and bridged by two additional oxide O atoms, resulting in a centrosymmetric dimer. The metal centre has a distorted octa-hedral coordination with the monoanionic Schiff base ligand occupying one equatorial and tw...

2008
Hapipah M. Ali M. I Mohamed Mustafa Mohd. Razali Rizal Seik Weng Ng

The Zn atom in the title compound, [Zn(C(17)H(14)ClN(2)O)(2)], is N,O-chelated by two deprotonated Schiff base monoanionic ligands in a tetra-hedral coordination geometry. The Zn atom lies on a special position of site symmetry 2.

Journal: :Molecules 2009
Yan-Fang Wang Jian-Feng Liu Hui-Duo Xian Guo-Liang Zhao

A new dinuclear complex, [Ni(2)(H(2)O)L(4)].5H(2)O, consisting of chelating bidentate and bridging tridentate coordinated 2-[(4-methylphenylimino)methyl]-6-methoxyphenol (HL) Schiff base ligands and water molecules has been synthesized using a traditional method. The structure of this complex was characterized by FTIR and UV/Vis spectroscopy and thermogravimetric analyses (TG-DTG) and further c...

2013
Junaid Alam Khan

In this paper we study the relation between nonhomogeneous and homogeneous Sagbi bases. As a consequence, we present a general principle of computing Sagbi bases of a subalgebra and its homogenized subalgebra, which is based on passing over to homogenized generators.

2008
Jun-Ying Ma

The title mononuclear zinc(II) complex, [Zn(C(17)H(14)Br(2)N(2)O(2))], possesses a crystallographically imposed C(2) axis. The Zn atom is four-coordinated by two O and two N atoms from two Schiff base ligands, forming a severely distorted square-planar geometry. The central C atom of the propyl group is disordered over two positions about the twofold axis.

Journal: :Acta poloniae pharmaceutica 2014
Ghulam Murtaza Amara Mumtaz Farhan Ahmed Khan Saeed Ahmad Saira Azhar Shujaat Ali Khan Muhammad Najam-Ul-Haq Muhammad Atif Aneela Maalik

Schiff bases are the biologically privileged scaffolds in organic chemistry, commonly synthesized from the condensation reaction of carbonyl functional group with amines. Naturally occurring and synthetically prepared Schiff bases are active molecules with many pharmacological activities like antibacterial, anti-cancer, anti-fungal, anti-malarial, antioxidant and many more. This review article ...

2014
N. Srividhya

The new Schiff bases are synthesis from various and aldehyde and amine under magnetic stirrer method .The synthesized Schiff base were characterized by spectral techniques (UV-Spectra & IR-Spectra). And the Schiff base are yellow colour solid and having sharp melting point and insoluble in organic solvents.

2012
T. Sogo J. Romero A. Sousa A. de Blas M. L. Durán E. E. Castellano

X-Ray, Zinc, Schiff Bases, Electrochemical Synthesis The electrochemical synthesis and physico-chemical properties of neutral zinc(II) complexes of bidentate Schiff bases derived from salicylaldehydes are presented together with the X-ray structure of bis[N-(4-methylphenyl)salicylaldiminato]zinc(II). The crystal is monoclinic, a = 21.877(3), b = 8.801(2), c = 12.027(5) Ä , ß = 96.55(3)°, space ...

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