Crystal structure, ir-spectrum and electrochemical behaviour of cu(creatinine)2cl2
TL;DR: In this paper, the crystal structure of the little compound has been solved by single-crystal X-ray diffractometry, where the CuII ion is located on a two-fold crystallographic axis in a quasi-tetrahedral coordination.
About: This article is published in Polyhedron.The article was published on 1997-01-01. It has received 23 citations till now. The article focuses on the topics: Cyclic voltammetry & Infrared spectroscopy.
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TL;DR: In this article, the stability constants of binary complexes formed by creatinine with Zn(II) and Cd(II), and of the mixed-ligand complexes Zn((II)-creatinine1-asparagine and Zn-(II) creatinines-l-glutamic acid) were determined by the Calvin-Bjerrum and IrvingRossotti methods.
Abstract: Creatinine is a physiological component of blood, brain and muscles and an important bioligand, which is the last product of the nitrogen metabolism in the vertebrates. In this study , the stability constants of binary complexes formed by creatinine with Zn(II) and Cd(II), and of the mixed-ligand complexes Zn(II)-creatinine1-asparagine and Zn(II) creatinine-l-glutamic acid were determined by the Calvin-Bjerrum and IrvingRossotti methods. The conditional formation constants and the formation pH ranges of complexes were determined. Relative abundance was plotted using conditional formation constants of the complexes and the steps of the complexes are shown in graphs. The composition of metal-creatinine complexes was determined as metal/ligand = 1: 1.
6 citations
TL;DR: In this paper, the carboxylate group of vanadyl(IV) cation and creatine phosphate was detected in aqueous solution, and it was shown that the interaction occurs through the phosphate group.
6 citations
01 May 2018
TL;DR: In this article, the synthesis of [L1] and [L2] Schiff base ligands by the reaction of vanillin with urea and thiourea respectively in 2:1 mol ratio was studied.
Abstract: The research includes synthesis of [L1] and [L2] Schiff base ligands by the reaction of vanillin with urea and thiourea respectively in 2:1 mol ratio. The two ligands were reacted with CuII ion in 1:2 mol ratio and HgII ion in 1:1 mol ratio. The prepared compounds have been identified by FTIR, U.V-Vis, 1H-NMR (L1, L2 and HgII complex) spectroscopies, microelemental analysis (C.H.N.S), magnetic susceptibility measurements, atomic absorption, chloride content along with conductivity and melting point measurements. According to applied characterization methods, the proposed general formulas of CuII and HgII complexes were [Cu2LnCl4] and [HgLnCl]Cl, respectively, (where n = 1, 2). The ability of corrosion inhibition with two ligands and their cupper complexes has been studied in diluted hydrochloric acid media.
6 citations
TL;DR: In this paper, the electrochemical behavior of Co(creatinine)2Cl2 was investigated by cyclic voltammetry in organic solvents (DMSO and DMF) and in aqueous solution.
Abstract: The electrochemical behavior of Co(creatinine)2Cl2 was investigated by cyclic voltammetry in organic solvents (DMSO and DMF) and in aqueous solution. Analysis of the results indicates that the electroactive species depend on the nature of the solvent. In DMF a single reduction process Co(II)/Co(I) is observed. In DMSO the redox behavior of the complex changes with the scan rate and a two-electron transfer process can be eventually observed. In aqueous solution the complex immediately decomposes giving rise to the aquo-cation. The characteristic peak of the redox couple Cl2/Cl− is observed as a consequence of the chloride released from the coordination sphere. Analysis of the electronic spectra gave additional support to the proposed mechanisms. The Co-Cl and Co-N stretching bands were clearly identified in the low frequency region of the IR spectrum.
5 citations
TL;DR: In this paper, the authors used titration potentiometry and spectrophotometry to determine stability constants for mixed complexes of Cu(II) with creatinine and EDTA.
Abstract: Titration potentiometry and spectrophotometry have both been used to determine stability constants for mixed complexes of Cu(II) with creatinine and EDTA. Stability constants of the ternary system were evaluated by a method suggested by the Irving-Rossotti procedure. Conditional constants were established as a function of pH; the maximum values of the conditional formation constants were found to be in agreement with the mixed-ligand complex formation constants in a given pH region. The mole fractions of mixed complexes were calculated using the formation constants. The stability constants of mixed-ligand complexes at 25°C are: log K| = 5.29, log K2 = 4.97, with ionic strength being kept constant at I = 0.1 with NaC104. Also, Cu(II)-I-glutamic acid-creatinine and Cu(II)-EDTA-creatinine complex formation, as examined by the spectrophotometric method, gave results that were in agreement with those of the Potentiometrie method. K e y w o r d s : creatinine, EDTA, 1-glutamic acid, copper(II) complexes, mixed complex, stability constants.
5 citations
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Book•
01 Jan 1937
TL;DR: The third edition, coming ten years after the first, emphasizes both the flowering of biochemical research and the prodigious effort by busy teachers and scientists to keep up to date this popular text and reference.
Abstract: Principles of biochemistry , Principles of biochemistry , مرکز فناوری اطلاعات و اطلاع رسانی کشاورزی
5,830 citations
TL;DR: In this paper, the integral equations obtained from the boundary value problems were solved and extensive data were calculated which permit construction of stationary electrode polarograms from theory, making it possible to develop diagnostic criteria so that unknown systems can be characterized by studying the variation of peak current, half-peak potential, or ratio of anodic to cathodic peak currents as a function of rate of voltage scan.
Abstract: was developed for solving the integral equations obtained from the boundary value problems, and extensive data were calculated which permit construction of stationary electrode polarograms from theory. Correlations of kinetic and experimental parameters made it possible to develop diagnostic criteria so that unknown systems can be characterized by studying the variation of peak current, half-peak potential, or ratio of anodic to cathodic peak currents as a function of rate of voltage scan.
4,542 citations
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