Acetate ions is a monocarboxylic acid anion resulting from the removal of a proton from the carboxy group of acetic acid. It has a role as a human metabolite and a Saccharomyces cerevisiae metabolite. It is a conjugate base of an acetic acid.
Acetate ions is salt or ester form of acetic acid. Acetate ions is the most common building block for biosynthesis, such as fatty acids.
The asymmetric stretch of the carboxylate group located near 1560 cm−1 in solutions of sodium acetate ions in water and 6M sodium chloride was investigated by linear and two-dimensional infrared spectroscopies. The linear IR spectra showed that the carboxylate asymmetric stretch central frequency and bandwidth are not significantly perturbed by the presence of a large amount of sodium chloride. Similarly, the frequency-frequency autocorrelation functions extracted from the time evolution of two-dimensional infrared spectra revealed a dynamical component having a picosecond time constant which is also not affected by the presence of high salt concentrations. A comparative study on the asymmetric stretch of the azide ion showed that the lack of change in the vibrational spectroscopy of the ion in the presence of large concentration of sodium chloride is particular to the acetate ions. Ab initio molecular dynamics simulations and a frequency map confirmed our experimental observations and linked the observed vibrational phenomenon to the hydrogen bond structure and dynamics of the acetate ions first solvation shell, which is governed by the thermal rotation of its methyl group (—CH3).
The effect of acetate ions on the corrosion of reinforcing steel in chloride environments
The effect of acetate ions on the corrosion of reinforcing steel in chloride environments have been investigated. For this purpose, potentiodynamic polarization curves, electrochemical impedance spectroscopy (EIS) and compressive strength techniques were used. In the presence of acetate ions polarization resistance (R p) values of reinforced concrete were higher than those without acetate ions. AC impedance spectra revealed the similar results with R p measurements. The compressive strength of concrete specimens containing acetate ions was measured and an increase of 14.7–38.9% was observed.
Most of us are familiar with vinegar, it is a common kitchen ingredient having a sour taste. Vinegar is an aqueous solution of acetic acid (IUPAC name: ethanoic acid), with the chemical formula CH3COOH. When the acid loses a proton, the anion of the acetic acid is termed an ‘acetate anion’. When the acetate anion combines with a cation, the compound is called an ‘acetate’. The simplest acetate ions is hydrogen acetate, which is another name for acetic acid.
Acetate ions is the conjugate base of acetic acid. The acetate ions is commonly abbreviated as AcO- or -OAc. Acetic acid is a weak acid which dissociates in water to release a proton and an acetate ions at a pH of 5.5 or above. Acetate chemical formula is CH3COO-
CH3COOH + H2O ⇌ CH3COO- + H3O+
A very well-known reaction of vinegar (acetic acid) and baking soda (sodium bicarbonate) produces an acetate ester (sodium acetate). This mixture is often used for cleaning purposes.
