Observations on the thermal decomposition of cupric acetate monohydrate

Hill, John; Murphy, C. B.; Schacher, G. P.

doi:10.1016/0003-2670(61)80103-7

Cited by 7 publications

(6 citation statements)

References 2 publications

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“…[I 11 C U~( C H~C O~)~ --t 2CuO + 2CH3COCH3 + 2C02 Methane and acetic acid, which have been found as (minor) products (14), are possibly formed from ketene (produced by the pyrolysis of acetone).…”

Section: Thermal Decomposition Of Lead and Coppermentioning

confidence: 99%

Infrared spectra and thermal decompositions of metal acetates and dicarboxylates

Patil¹,

Chandrashekhar²,

George³

et al. 1968

Can. J. Chem.

143

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The infrared spectra of rare earth acetates have been studied to examine the metal-acetate bonding. The thermal decomposition of rare earth acetates as well as lead and copper acetates have been investigated in detail by employing thermogravimetric analysis and differential thermal analysis. Thermal decomposition of calcium dicarboxylates (malonate to sebacate) have been studied employing t.g.a. and d.t.a. Infrared spectra of the dicarboxylates have also been studied. Preliminary results on the products of decomposition of dicarboxylates have been reported.

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Section: Thermal Decomposition Of Lead and Coppermentioning

confidence: 99%

Infrared spectra and thermal decompositions of metal acetates and dicarboxylates

Patil¹,

Chandrashekhar²,

George³

et al. 1968

Can. J. Chem.

143

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“…Since removal of all organic material is important, usually short chain metal salts are the chosen starting material for the precursor solution. As both steps need to be optimized for the final film's properties and performance, an increasing number of studies can be found concerning growth analysis [5] and pyrolysis of metal salts like propionates and acetates of yttrium [6][7][8][9], copper [3,[10][11][12][13][14][15] and barium [16,17].…”

Section: Introductionmentioning

confidence: 99%

Thermal decomposition of CuProp2: In-situ analysis of film and powder pyrolysis

Rasi

Silveri

Ricart

et al. 2019

Journal of Analytical and Applied Pyrolysis

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The thermal decomposition of CuProp2 in the form of film and powder was studied in different atmospheres by means of thermal analysis techniques (TG-MS, TG-IR, EGA), chemical-structural methods (FTIR, XRD, EA) and computational thermochemistry (VASP/PBE). The decomposition mechanism in terms of volatiles evolved was disclosed with the aid of ab-initio modeling; it was found to be dependent on the gas diffusion in and out of the sample and accelerated by a humid atmosphere. In films, the copper redox behavior showed sensitivity to the residual atmosphere. Finally, the role of the metal center is discussed in the frame of a general decomposition mechanism for metal propionates. Volatile species evolved during decomposition can be detected by means of thermogravimetry (TG) coupled with Evolved Gas Analysis (EGA), which mainly works by infrared (EGA-FTIR or TG-FTIR) or by mass spectrometry (EGA-MS or TG-MS) detection. In fact, by EGA-FTIR and EGA-MS, it was shown that the decomposition of propionates in inert atmospheres involves formation of radicals C2H5• and C2H5CO• (along with CO2) and their recombination to form a symmetrical ketone [20-22]. For longer chain salts such as Ca(II)decanoate, techniques like pyrolysis coupled to gas chromatography (GC) revealed a more complicated scenario where normal alkanes were found along with several symmetrical ketones [23]. For odd chain length of Cu(II)carboxylates like Cu(II)propionate, only MS has been used for the in-situ EGA analysis and 2-pentanone (asymmetrical ketone) was reported to be the main decomposition product [11]. Formation of this asymmetrical ke-tone implies cleavage of a CeC(C]O) bond, instead of the expected CeC(]O) and C(]O)eO bonds. Conversely, no ketones at all were observed for even chain carboxylates of copper(II) [24], mercury(II) [25] and silver(I) [26]. In fact, references [24,25] report on the

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“…Normally, in both DTA and DSC, the obtained maximum or minimum temperature values are dependent on heating rate, shifting to right as heating rate is increasing 18 . Evidences from literature 9,12,[14][15][16]18 show that the first stage is mainly related to dehydration of (CH 3 COO) 2 Cu . H 2 O (CuAcH 2 O) leading to formation of copper(II) acetate (CH 3 COO) 2 Cu (CuAc).…”

Section: Resultsmentioning

confidence: 99%

“…The decomposition of CuAcH 2 O is greatly affected by the ambient atmosphere. In general, researchers [9][10][11][12][13][14][15][16][17][18] have been relating that in vacuum, N 2 or Ar, and in air, the main solid products have been Cu 0 and Cu 2 O, CuO or Cu 4 O 3 , respectively. The gaseous or volatile products have been mainly composed by acetone (CH 3 CH 3 CO), acetic acid (CH 3 COOH), acetaldehyde (CH 3 CHO), methane (CH 4 ), carbon dioxide (CO 2 ), and hydrogen gas (H 2 ).…”

Section: Resultsmentioning

confidence: 99%

“…This material has been investigated by differential thermal analysis (DTA) 9,12,14,15,18 , thermogravimetry (TG) [13][14][15][16]18 , differential scanning calorimetry (DSC) 18 , X-ray diffractrometry (XRD) 9,12,16,18,[19][20][21] , scanning electron microscopy (SEM) 9,17,18 , both infrared (IR) and Raman spectroscopy 9,13,14,18,22 . These previously mentioned works pointed out that thermal decomposition course of CuAcH 2 O occurs in two stages: I) dehydration of CuAcH 2 O producing copper(II) acetate ((CH 3 COO) 2 Cu) (denoted by CuAc) and II) decomposition of CuAc producing solid products such as Cu, Cu 2 O, CuO or more rarely to Cu 4 O 3 , and gaseous or volatile products such as acetic acid, acetone, acetaldehyde, methane, carbon dioxide, and hydrogen.…”

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confidence: 99%

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Thermal, Structural and Morphological Characterisation of Freeze-dried Copper(II) Acetate Monohydrate and its Solid Decomposition Products

et al. 2002

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In the present study the thermal decomposition of a freeze-dried copper(II) acetate monohydrate powder, (CH 3 COO) 2 Cu . H 2 O, (FDCuAcH 2 O), was analysed by a combination of high-temperature X-ray diffractometry; differential scanning calorimetry and thermogravimetry, up to 700 °C. The structure and morphology of the calcined freeze-dried powders were analysed by scanning electron microscopy and X-ray diffractometry. The results showed that FDAcCuH 2 O decomposes during heating in two stages: I) (25-225 °C) FDCuAcH 2 O dehydrates giving rise to copper(II) acetate, (CH 3 COO) 2 Cu, (AcCu), and II) (225-525 °C) AcCu decomposes to CuO through complex oxidation reactions of Cu and Cu 2 O, simultaneously. SEM showed that FDCuAcH 2 O powder has a scale-like morphology, which is created in the freezing stage and retained after freeze-drying. After calcination at 125 and 225 °C, clusters of elongated tubes (or filaments) compose the resulting powder (AcCu). Subsequent calcination at temperatures above 325 °C resulted in hard clusters of spheroid-like CuO particles.

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Observations on the thermal decomposition of cupric acetate monohydrate

Cited by 7 publications

References 2 publications

Infrared spectra and thermal decompositions of metal acetates and dicarboxylates

Infrared spectra and thermal decompositions of metal acetates and dicarboxylates

Thermal decomposition of CuProp2: In-situ analysis of film and powder pyrolysis

Thermal, Structural and Morphological Characterisation of Freeze-dried Copper(II) Acetate Monohydrate and its Solid Decomposition Products

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