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Trithionic Acid
Trithionic acid is a polythionic acid consisting of three sulfur atoms. It can be viewed as two bisulfite The bisulfite ion (IUPAC-recommended nomenclature: hydrogensulfite) is the ion . Salts containing the ion are also known as "sulfite lyes". Sodium bisulfite is used interchangeably with sodium metabisulfite (Na2S2O5). Sodium metabisulfite disso ... radicals bridged by a sulfur atom. References Sulfur oxoacids {{chem-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hydrogen Trithionate
Polythionates are oxoanions with the formula (''n'' ≥ 0). They occur naturally and are the products of redox reactions of thiosulfate. Polythionates are readily isolable, unlike the parent polythionic acids. Preparation Many members of the polythionates have been characterized: dithionate, trithionate, tetrathionate, pentathionate, etc. These salts are often generated by oxidation of thiosulfate. For example, tetrathionate is obtained by oxidation of thiosulfate ion with iodine (reaction is used in iodometry): : More specialized routes involve reactions of sulfur chlorides with bisulfite salts: : : : Potassium pentathionate ion has been obtained from , sodium thiosulfate, and potassium acetate. Initially prismatic crystals of potassium tetrathionate appear, then lamellar crystals of potassium pentathionate, from which the influence of tartaric acid makes an aqueous solution of pentathionic acid. Potassium hexathionate has been synthesized by combining and in concentrated ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Polythionic Acid
Polythionic acid is an oxoacid which has a straight chain of sulfur atoms and has the chemical formula Sn(SO3H)2 (''n'' > 2). Trithionic acid (H2S3O6), tetrathionic acid (H2S4O6) are simple examples. They are the conjugate acids of polythionates. The compounds of ''n'' 2− + 2 HCl :: SCl2 + 2 → 3SS3SO3sup>2− + 2 HCl Anhydrous polythionic acids can be formed in diethyl ether solution by the following three general ways: : HSnSO3H + SO3 → H2S''n''+2O6 (''n'' = 1, 2 ... 8) : H2Sn + 2 SO3 → H2S''n''+2O6 (''n'' = 1, 2 ... 8) : 2 HSnSO3H + I2 → H2S2''n''+2O6 + 2 HI (''n'' = 1, 2 ... 6) Polythionic acids with a small number of sulfur atoms in the chain (''n'' = 3, 4, 5, 6) are the most stable. Polythionic acids are stable only in aqueous solutions, and are rapidly destroyed at higher concentrations with the release of sulfur, sulfur dioxide and - sometimes - sulfuric acid. Acid salts of polythionic acids do not exist. Polythionate ions are sign ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bisulfite
The bisulfite ion (IUPAC-recommended nomenclature: hydrogensulfite) is the ion . Salts containing the ion are also known as "sulfite lyes". Sodium bisulfite is used interchangeably with sodium metabisulfite (Na2S2O5). Sodium metabisulfite dissolves in water to give a solution of Na+. :Na2S2O5 + H2O → 2Na SO3 Structure The bisulfite anion exists in solution as a mixture of two tautomers. One tautomer has the proton attached to one of the three oxygen centers. In the second tautomer the proton resides on sulfur. The S-protonated tautomer has ''C''3v symmetry. The O-protonated tautomer has only Cs symmetry. Reactions Tautomerization There exist two tautomers of bisulfite. They interconvert readily but can be characterized individually by various spectroscopic methods. They have been observed by 17O NMR spectroscopy: :HSO3− SO2(OH)− K = 4.2 Acid-base reactions Solutions of bisulfite are typically prepared by treatment of sulfur dioxide with aqueous base: :SO ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
