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In chemistry, tetraborate or pyroborate is an anion (negative ion) with formula B 4 O 2− 7; or a salt containing that anion, such as sodium tetraborate, Na 2 B 4 O 7. It is one of the boron oxoacids, that is, a borate. The name is also applied to the hydrated ion [B 4 O 5 (OH) 4] 2− as present in borax
Borate ions occur, alone or with other anions, in many borate and borosilicate minerals such as borax, boracite, ulexite (boronatrocalcite) and colemanite. Borates also occur in seawater, where they make an important contribution to the absorption of low frequency sound in seawater. [1] Borates also occur in plants, including almost all fruits. [2]
Borax as a source of borate has been used to take advantage of the co-complexing ability of borate with other agents in water to form complex ions with various substances. Borate and a suitable polymer bed are used to chromatograph non-glycated hemoglobin differentially from glycated hemoglobin (chiefly HbA1c), which is an indicator of long ...
With a formula weight of 86.8, BF – 4 is also conveniently the smallest weakly coordinating anion from the point of view of equivalent weight, often making it the anion of choice for preparing cationic reagents or catalysts for use in synthesis, in the absence of other substantial differences in chemical or physical factors.
Tetraboric acid or pyroboric acid is a chemical compound with empirical formula H 2 B 4 O 7. [2] It is a colourless water-soluble solid formed by the dehydration or polymerization boric acid. Tetraboric acid is formally the parent acid of the tetraborate anion [B 4 O 7] 2−.
Boranes are chemical compounds of boron and hydrogen, with the generic formula of B x H y. These compounds do not occur in nature. Many of the boranes readily oxidise on contact with air, some violently. The parent member BH 3 is called borane, but it is known only in the gaseous state, and dimerises to form diborane, B 2 H 6. The larger ...
Sodium tetraphenylborate is the organic compound with the formula NaB(C 6 H 5) 4.It is a salt, wherein the anion consists of four phenyl rings bonded to boron. This white crystalline solid is used to prepare other tetraphenylborate salts, which are often highly soluble in organic solvents.
The ethyl ether solvate is also commercially available, where the fluoroboric acid can be represented by the formula [H((CH 3 CH 2) 2 O) n] + [BF 4] −, where n is 2. It is mainly produced as a precursor to other fluoroborate salts. [3] It is a strong acid. Fluoroboric acid is corrosive and attacks the skin.