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Journal ArticleDOI

Thermal decomposition of copper(II) glutamates

16 Aug 1981-Thermochimica Acta (Elsevier)-Vol. 47, Iss: 2, pp 235-237

AboutThis article is published in Thermochimica Acta.The article was published on 1981-08-16. It has received 1 citation(s) till now. The article focuses on the topic(s): Thermal decomposition & Copper.

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Citations
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Journal ArticleDOI
Abstract: Synthesis and Crystal Structure of Ammine(μ3-L-glutamato)copper(II) [Cu(L-Glu)H2O]·H2O reacts with aqueous ammonia to give the ammine complex [Cu(L-Glu)NH3] (1). 1 forms orthorhombic crystals, space group P 21212 with a = 1585,1(1) pm; b = 979,46(7) pm and c = 504,70(5) pm. In the crystal structure of 1 the copper atoms are linked by μ3-glutamate units to give a 2D layer structure. The copper atoms exhibit a square-pyramidal coordination with two N atoms and two O atoms in the base plane and one O atom at the apex of the pyramid. The crystal structure is stabilized by a 3D network of N–H···O hydrogen bridges.

References
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Journal ArticleDOI
Abstract: A series of transition-metal (II) pyridine complexes, [M(py) 2 X 2 where M  Cu 2+ , N 2+ , Co 2+ , Mn 2+ , Zn 2+ , and X  Cl − , NO 3 − , NCS − ,] and two series of copper (II) chloride complexes with mono- and dimethyl substituted pyridines and with 4-substituted pyridines were studied by differential thermal analysis. The thermal stability was correlated with thermodynamic constants determined in solution and with bond energies determined by far infra-red spectroscopy. In the transition-metal series thermal stability increased with increasing stability in solution. In the copper series the opposite trend was found. As base strength of the ligand increased the thermal stability decreased. This can be best explained by an oxidation-reduction reaction occurring during decomposition.

37 citations

Journal ArticleDOI
Abstract: The thermal dissociation of [Cu(NH 3 ) 6 ]Br 2 , [Cu(NH 3 ) 6 ]Cl 2 , [Cu(NH 3 ) 5 ]SO 4 , and [Cu(NH 3 ) 4 ]I 2 , was studied by differential thermal analysis, thermomagnetic analysis, pyrolysis on the mass spectrometer, and by chemical analysis of the residues and reaction products. The complexes dissociated through the loss of ammonia, forming stable lower ammines, and upon further heating, the reduction of the copper(II) to copper(I) took place. The stoicheiometry of the thermal dissociation reaction was determined.

18 citations