Carboxylic acids are Brønsted-Lowry acids, they are proton donors. They are the most common type of organic acid. Among the simplest examples are the formic acid H-COOH, that occurs in ants, and acetic acid H3C-COOH group, that gives vinegar its sour taste. Acids with two or more carboxyl groups are called dicarboxylic, tricarboxylic, etc. The simplest dicarboxylic example is oxalic acid (COOH)...

Tyrosine phenol-lyase (TPL), which catalyzes the beta-elimination reaction of L-tyrosine, and aspartate aminotransferase (AspAT), which catalyzes the reversible transfer of an amino group from dicarboxylic amino acids to oxo acids, both belong to the alpha-family of vitamin B6-dependent enzymes. To switch the substrate specificity of TPL from L-tyrosine to dicarboxylic amino acids, two amino ac...

The title mol-ecule, C(12)H(8)N(2)O(4), lies on an inversion center. In the crystal structure, inter-molecular O-H⋯O hydrogen bonds connect mol-ecules into one-dimensional chains along [11].

In the title compound, C(8)H(12)O(4), the two carboxyl groups are on the same side of the cyclohexane ring and the ring adopts a chair conformation. Adjacent mol-ecules related by an inversion centre are linked by pairs of O-H⋯O hydrogen bonds, forming a zigzag chain along [1].

Acoustic properties like partial molal volume (φ) apparent molal Compressibility(φk(s)), adiabatic compressibility(βs), intermolecular freee path length (Lf), specific acoustic impendence (Z) and relative association(RA) have been evaluated by studying ultrasonic velocities and densities of dicarboxylic acid ltaconic acid. Malonic acid, Maleic acid and Succinic acid in different percentage of d...

The hydrothermal reaction of M(NO(3))(2).4H(2)O (M = Zn and Cd) with benzene-1,4-dicarboxylic acid (H(2)bdc) or benzene-1,3-dicarboxylic acid (H(2)ip) and 1,2-bis(1,2,4-triazol-4-yl)ethane (btre) produced the mixed-ligand coordination polymers (MOFs) {[Zn(2)(micro(2)-bdc)(2)(micro(4)-btre)]} (), {[Cd(2)(micro(4)-bdc)(micro(4)-btre)(2)](NO(3))(2).H(2)O} and {[Zn(2)(micro(3)-ip)(2)(micro(2)-btre)...

The title compound, (C(10)H(9)N(2))[Al(C(7)H(3)NO(4))(2)]·3H(2)O or (2,2'-bipyH)[Al(pydc)(2)]·3H(2)O (where 2,2'-bipy is 2,2'-bipyridine and pydcH(2) is pyridine-2,6-dicarboxylic acid), was synthesized by the reaction of aluminium(III) nitrate nona-hydrate with pyridine-2,6-dicarboxylic acid and 2,2'-bipyridine in a 1:2:4 molar ratio in aqueous solution. This compound is composed of an anionic ...

We report a new method developed for the determination of stable carbon isotopic composition of homologous alpha,omega-dicarboxylic acids and phthalic acid isolated from environmental samples such as atmospheric aerosols and snow. Dicarboxylic acids are derivatized with BF3/1-butanol to dibutyl esters, which are analyzed for the stable carbon isotopic composition using a capillary GC interfaced...

Abstract Chelidonic acid (4-oxo-4H-pyran-2,6-dicarboxylic acid) is present in plants of Papaveraceae family, especially Chelidonium majus . Due to its anticancer, antibacterial, hepatoprotective, and antioxidant properties, it has been used medical treatments. In this work, the X-ray structure methanol solvate chelidonic was determined. Layers are held by hydrogen bonds via COOH C = O fragments...

The title compound, (C(10)H(9)N(2))[Cr(C(7)H(3)NO(4))(2)]·4H(2)O or (4,4'-bipyH)[Cr(pydc)(2)]·4H(2)O (where 4,4'-bipy is 4,4'-bipyridine and pydcH(2) is pyridine-2,6-dicarboxylic acid), was synthesized by the reaction of chromium(III) chloride hexa-hydrate with pyridine-2,6-dicarboxylic acid and 4,4'-bipyridine in a 1:2:4 molar ratio in aqueous solution. This compound is composed of an anionic ...