A raman spectroscopic study of nickel(II) acetate, Ni(CH3COO)2 and its aqueous and methanolic solutions

Speciation of aqueous Ni(II)-carboxylate and Ni(II)-fulvic acid solutions: Combined ATR-FTIR and XAFS analysis

“…The presence of Ni(II) in carboxylate solutions causes a small decrease (or no change) in as and a small increase in s when compared to Ni(II)-free solutions. Monodentate coordination in crystalline Ni(II)-acetate has been shown to exhibit similar infrared spectral trends in some studies, but reports vary significantly from different studies, thus calling into question the utility of making comparisons between solution and solidphase data (Edwards and Hayward, 1968;Deacon and Phillips, 1980;Bickley et al, 1990). The small variations observed for aqueous solutions can be caused by interactions of Ni(II) with the carboxylate either through weak inner-sphere or outersphere complex formation, which do not change the force constants of the carboxylate moiety.…”

Rehydration and Phase Changes of Potassium Acetate-Intercalated Halloysite at 298 K

“…These two C− .... O bonds interact as in-phase and out-of-phase vibrations to give two bands: the antisymmetric stretching vibration, which is intense in the infrared spectra but weak to very weak in intensity in the Raman spectra, and a symmetric stretching band, which is weak in intensity in the infrared spectra but strong and polarized in the Raman spectra. These two vibrations are normally found in the 1540 to 1650 cm −1 and 1360 to 1450 cm −1 regions, respectively (23). The Raman spectra of acetate in the potassium acetate-intercalated halloysite show a very low intensity, broad band with maxima at 1565 cm −1 , attributed to the antisymmetric stretching vibrations.…”

“…Thus changes in the C=O and C-C stretching bands should be expected. When the salts of carboxylic acids such as acetic acid are formed, the C=O and C-O bonds are replaced by two equivalent C− .... O bonds with a bond order of 1.5 (23)(24)(25)(26). These two C− .... O bonds interact as in-phase and out-of-phase vibrations to give two bands: the antisymmetric stretching vibration, which is intense in the infrared spectra but weak to very weak in intensity in the Raman spectra, and a symmetric stretching band, which is weak in intensity in the infrared spectra but strong and polarized in the Raman spectra.…”

A spectroscopic study of the mineral paceite (calcium acetate)

“…Though one of the major difficulties associated with studying the spectroscopy of acetates is the large amount of variation in the reported literature [5]. In recent years there has been spectral data published on Mg, Ni, Co, Na and many other metal acetates [1, [6][7][8] though limited data has been published on calcium acetate. One of the reasons for this is the lack of suitable samples.…”