A four-membered chelate complex of Cu(II) with creatinine
TL;DR: In this article, the complex formation between creatinine and Cu(II) was studied by means of electronic, IR and EPR spectroscopy, and spectral data showed the formation of a four-membered chelate with distorted rhombic structure.
About: This article is published in Polyhedron.The article was published on 1985-01-01. It has received 19 citations till now.
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TL;DR: In this paper, two creatinine complexes were obtained in the form of suitable crystals for X-ray crystallography, one in triclinic space group P 1 (#2) with a = 9.940(2) A, b = 15.732(6), A, c = 9,339(3) A, α = 96.30 (3)°, γ = 75.83(3)-°, V = 1369(2), Z = 1, R = 0.039.
16 citations
TL;DR: In this article, three Ni(II)-creatinine complexes are synthesized in organic media and it is proved that the complexes are formed only in nonaqueous media and their dissolution in water is connected with immediate dissociation.
16 citations
TL;DR: In this article, a square-wave voltammetric method for creatinine was developed using a gold electrode modified with a film composed by Nafion mixed with a graphene quantum dots dispersion prepared in the presence of Cu2+.
12 citations
TL;DR: In this article, a tetrahedral geometry for the Cu(II) adduct with neutral creatinine was obtained and IR evidence suggests that the adduct is tetrahedrahedral.
Abstract: A Cu(II) complex of creatinine (creat) was prepared, with formula Cu(creat)2Cl2, as well as a Cu(I) creatinine complex, Cu(creat H_1)(EtNH2).H2O(EtNH2 = ethylamine). The Cu(II) adduct is complexed with neutral creatinine and IR evidence suggests a tetrahedral geometry for the complex with bonding to the ring amino nitrogen atom. Diamagnetic Cu(creat H_1)(EtNH2).H2O, formed from a redox reaction between Cu(II) and creatinine, is composed of Cu(I) atoms bonded to the deprotonated ring amino nitrogen, with the exocyclic carbonyl group hydrogen bonded to coordinated ethylamine molecules.
11 citations
TL;DR: In this article, a monomeric and dimeric copper(II) complexes with creatinine were synthesized in organic media using spectroscopic (EPR and IR) and magnetochemical methods.
9 citations
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2,329 citations
TL;DR: In this article, the properties of Cu(II) complexes of saturated macrocyclic ligands with square-pyramidal array were examined by cyclic voltammetry, electron spin resonance, visible absoption and magnetic circular dichroism spectroscopy.
123 citations
35 citations
TL;DR: In this paper, Zinc, cadmium and mercury(II) complexes of creatinine of the composition M(Creat) 2 X 2 (X = Cl, Br or I) are characterized by analytical and spectral methods.
26 citations
TL;DR: In this article, the heat required to dissociate cyanogen into two CN radicals D(C2N2) has been determined with an x-ray densitometer as a function of shock velocity.
Abstract: Density ratios across shock waves in a 0.85 Kr+0.15 C2N2 mixture at an initial pressure of 50 mm Hg and room temperature, have been determined with an x‐ray densitometer as a function of shock velocity. The heat required to dissociate cyanogen into two CN radicals D(C2N2) has been determined to be 145±6 kcal/mole by comparing the experimental data with curves of density ratio vs shock velocity calculated as a function of D(C2N2). Dissociation energies of 174±3 kcal/mole for CN and 129±3 kcal/mole for HCN forming H and CN, and a heat of formation of 109±3 kcal/mole for CN, were obtained by the application of Hess's law to the appropriate chemical reactions using this value of D(C2N2) and the currently accepted values for the dissociation energy of nitrogen (225 kcal/mole) and the heat of sublimation of graphite (170 kcal/mole). The value of D(HCN) was confirmed by analogous density‐velocity measurements on shock waves in a 0.85 Kr+0.15 HCN mixture. A rate constant for the recombination of CN to form C2N2 at 2900°K was deduced from the variation of density with time behind the shock. The value obtained was of the order of 1×109 (mole/liter)—2 sec—1.
26 citations