Search results
Results from the WOW.Com Content Network
Silicic acid is the name given to a variety of compounds with a generic formula [SiO x (OH) 4−2x] n. [24] [25] Orthosilicic acid has been identified in very dilute aqueous solution. It is a weak acid with pK a1 = 9.84, pK a2 = 13.2 at 25 °C. It is usually written as H 4 SiO 4, but the formula Si(OH) 4 is generally accepted.
Orthosilicic acid can be produced by Pd-catalyzed hydrogenolysis of tetrabenzoxysilicon: [5] Si(OCH 2 Ph) 4 + 4 H 2 → Si(OH) 4 + 4 PhCH 3. The acid was crystallized from a solution of dimethylacetamide and tetrabutylammonium chloride. As established by X-ray crystallography, the chloride anions interact with the acid via hydrogen bonds.
In chemistry, a hydroxy or hydroxyl group is a functional group with the chemical formula −OH and composed of one oxygen atom covalently bonded to one hydrogen atom. In organic chemistry , alcohols and carboxylic acids contain one or more hydroxy groups.
Orthoformic acid or methanetriol is a chemical compound with the formula H C(OH) 3. In this molecule, the central carbon atom is bound to one hydrogen and three hydroxyl groups. Orthoformic acid was long held to be a hypothetical chemical compound , as it was expected to decompose instantly into formic acid and water, making it too unstable to ...
Skeletal structural formula of Vitamin B 12.Many organic molecules are too complicated to be specified by a molecular formula.. The structural formula of a chemical compound is a graphic representation of the molecular structure (determined by structural chemistry methods), showing how the atoms are connected to one another. [1]
For instance, in ceramics applications, the kaolinite formula can also be written in terms of oxides, thus the corresponding formula for kaolinite, Al 2 Si 2 O 5 (OH) 4, is Al 2 O 3 · 2 SiO 2 · 2 H 2 O. or in CCN AS 2 H 2.
Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!
Borate anions (and functional groups) consist of trigonal planar BO 3 and/or tetrahedral BO 4 structural units, joined together via shared oxygen atoms (corners) or atom pairs (edges) into larger clusters so as to construct various ions such as [B 2 O 5] 4−, [B 3 O 8] 7−, [B 4 O 12] 12−, [B 5 O 6 (OH) 5] 2−, [B 6 O 13] 8−, etc. These ...