Infrared spectra and thermal decompositions of metal acetates and dicarboxylates

Abstract

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.

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

“…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).…”

“…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 ).…”

“…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.…”

Electrochemical deposition of dodecanoate on lead in view of an environmentally safe corrosion inhibition

“…In contrast, for the immersion method it takes some hours to deposit the dodecanoate film as the lead ions are generated in another way as described by Rocca [2][3]. is often use to characterize the exact bonding [17][18][19]. Waddington and co-workers [17] concluded earlier that a bidentate structure is indicated when is in the vicinity of 100 cm -1 or less and for a bridged ligand the νhas a value near 150 cm -1 .…”

Mass Spectral Studies of Binuclear Metal Complexes: Copper(I) Carboxylates

“…Residues of metal or metal oxide were reported in the thermogravimetric analysis of copper(I1) acetate (23,24), trifluoroacetate (25), n-butyrate (26), and halobenzoates (27), and metal bromide from copper(I1) bromoacetate (28), though some differences in reported decomposition products probably reflect different experimental conditions and procedures. In Angel's early study (2) the yield of cuprous acetate was 3-4%.…”