Synthesis, Crystal Structure, Spectral Studies, and Catechol Oxidase Activity of Trigonal Bipyramidal Cu(II) Complexes Derived from a Tetradentate Diamide Bisbenzimidazole Ligand

2001 ◽  
Vol 40 (5) ◽  
pp. 878-885 ◽  
Author(s):  
Manisha Gupta ◽  
Pavan Mathur ◽  
Ray J. Butcher
Keyword(s):  
Crystal Structure ◽  
Oxidase Activity ◽  
Spectral Studies ◽  
Catechol Oxidase ◽  
Trigonal Bipyramidal

Nuclearity dependent solvent contribution to the catechol oxidase activity of novel copper(ii) complexes derived from Mannich-base ligand platforms: synthesis, crystal structure and mechanism

2017 ◽  
Vol 41 (16) ◽  
pp. 8586-8597 ◽  
Author(s):  
Ria Sanyal ◽  
Sergey Ketkov ◽  
Suranjana Purkait ◽  
Franz A. Mautner ◽  
Grigory Zhigulin ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Oxidase Activity ◽  
Mannich Base ◽  
Kinetic Studies ◽  
Catechol Oxidase ◽  
Catecholase Activity

Solvent-dependent kinetic studies of the catecholase activity of a set of Cu(ii) complexes reveal alcoholysis and hydrolysis as the governing factors for kcat extrema.

On the stabilization of five-coordinate trigonal-bipyramidal palladium(II) species. Crystal structure of (2,9-dimethyl-1,10-phenanthroline)methylchloropalladium(II)

1991 ◽  
Vol 403 (1-2) ◽  
pp. 269-277 ◽  
Author(s):  
Vincenzo De Felice ◽  
Vincenzo G. Albano ◽  
Carlo Castellari ◽  
Maria E. Cucciolito ◽  
Augusto De Renzi
Keyword(s):  
Crystal Structure ◽  
Trigonal Bipyramidal

scholarly journals The crystal and molecular structure of the bis(N,N,N′,N′-tetramethylethanediamine) adduct of I(Br)InInBr2, In2Br3I•2C6H16N2, an indium–indium bonded molecule

1984 ◽  
Vol 62 (3) ◽  
pp. 601-605 ◽  
Author(s):  
Masood A. Khan ◽  
Clovis Peppe ◽  
Dennis G. Tuck
Keyword(s):  
Molecular Structure ◽  
Crystal Structure ◽  
Crystal And Molecular Structure ◽  
Heavy Atom ◽  
Orthorhombic Space Group ◽  
Trigonal Bipyramidal ◽  
Cell Dimensions ◽  
Unit Cell Dimensions ◽  
Heavy Atom Method ◽  
Distorted Trigonal Bipyramidal

The crystal structure of the title compound has been determined by the heavy atom method. The crystals are orthorhombic, space group Pbca, with unit cell dimensions a = 22.795(3) Å, b = 17.518(2) Å, c = 12.396(3) Å, Z = 8; R = 0.0409 for 1527 unique "observed" reflections. The structure is disordered, with each halogen site (X) occupied by 75% Br, 25% I. The molecule consists of two X2(tmen)In units (tmen = N,N,N′,N′-tetramethylethanediamine) with distorted trigonal bipyramidal geometry, joined by an In—In bond 2.775(2) Å in length.

Systhesis, Characterization and Spectroscopic Properties of (2E,6E)-2,6-Bis(2,3,4-tri-methoxy-benzylidene)cyclohexanone

2011 ◽  
Vol 396-398 ◽  
pp. 2338-2341
Author(s):  
Xing Chuan Wei ◽  
Zhi Li Liu ◽  
Kun Zhang ◽  
Zhi Yun Du ◽  
Xi Zheng
Keyword(s):  
Crystal Structure ◽  
Acetic Acid ◽  
Hydrogen Bonds ◽  
Title Compound ◽  
Spectroscopic Properties ◽  
Spectral Studies ◽  
Double Bonds ◽  
X Ray ◽  
Π Interactions ◽  
X Ray Crystallography

In this paper, (2E,6E)-2,6-Bis(2,3,4-tri-methoxy -benzylidene)cyclohexanone (omitted as tmbcho) (1) was obtained by the reaction of acetic acid, tetrahydrofuran, cyclohexanone and 2,3,4-tri-methoxy-benzaldehyde. Three non-classic hydrogen bonds were observed in the compound. X-ray crystallography shows that the crystal structure is stabilized by intermolecular C-H•••π interactions and it contains plenty of conjugated double bonds. The title compound was characterized by UV-vis and fluorescent spectral studies.

scholarly journals Synthesis, Characterization, Antibacterial and Thermal Studies of Cu(II) Complex of Thiophene-2- aldehyde Semicarbazone

2020 ◽  
pp. 1-10
Author(s):  
Dipta Sarker ◽  
Md. Yeamin Reza ◽  
Md. Masuqul Haque ◽  
Rausan Zamir ◽  
Md. Ali Asraf
Keyword(s):  
Antimicrobial Activity ◽  
Copper Complex ◽  
Chelating Agents ◽  
Thermal Studies ◽  
Free Ligand ◽  
Enterobacter Aerogenes ◽  
Charge Ratio ◽  
Spectral Studies ◽  
Electrospray Mass Spectrum ◽  
Trigonal Bipyramidal

Copper (II) complex of the ligand, thiophene-2-aldehyde semicarbazone was synthesized and characterized. Their structures were explored on the basis of CHN analysis, conductance and magnetic susceptibility measurements, spectral studies (FT-infrared and ESI-MS) and thermogravimetric analysis (TGA). It has been observed from spectral and analytical studies, the copper complex have the composition of [CuL(CH3COO)2(H2O)] [where L is thiophene-2-aldehyde semicarbazone]. The electrospray mass spectrum of the ligand and complex exhibited ion at mass-to charge ratio (m/z) of 169.13 and 368.86 matching the calculated values for the molecular ion of the ligand and complex, respectively. One mole of the ligand behaves as bidentate chelating agents around the Cu(II) ion. From conductivity studies, we obtained that the copper complex of the ligand, thiophene-2-aldehyde semicarbazone had no ionic properties. All data confirmed a trigonal bipyramidal geometry of the complex. Antibacterial activity of the compounds against the microbe Enterobacter aerogenes and Bacillus cereus have been screened to reflect that the complex has higher antimicrobial activity than the free ligand.

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