Sulfur dioxide reactions with metals

Once sulfur dioxide has escaped into the atmosphere, it undergoes a series of reactions by which it is converted to sulfuric acid. Those reactions are somewhat complex and may follow at least three different courses. In the first of these reaction sequences, sulfur dioxide reacts with hydroxyl radicals in the atmosphere in the presence of some metallic catalyst (M) to form the bisulfite radical (HSO3 ) ... 

Sulfuryl fluoride has been prepared by a number of methods. Most of these consist of the fluorination of a sulfur-oxygen compound, as in the direct reaction of elemental fluorine with sulfur dioxide,1 a metal sulfate, or a metal thiosulfate.2 A well-known exception to this general method is the pyrolysis of barium fluorosulfate 3... 

Sulfur dioxide reacts generally with transition metal alkyl, aryl, and a-allyl complexes to give sulfinate complexes. The reaction, first described in 1964 by Wojcicki and Bibler, resembles well-known insertion reactions of CO, C2F4, SnCl2, tetracyanoethy-lene, and other unsaturated species into metal-alkyl bonds, but there are important stereochemical and mechanistic differences Sulfur dioxide insertion into metal-alkene and metal-alkyne bonds have not been reported. However, PdCl2 has been used as a catalyst for copolymerization of ethylene and SO2 to polysulfones and insertion into a Pd-ethylene bond is a conceivable reaction step. 

The first of the previous reactions is responsible for a good portion of the acid rain problem troubling the industrialized world. Sulfur, present in small quantities as an impurity in coal and oil, is converted to sulfur dioxide when the coal or oil is burned then the sulfur dioxide reacts with the moisture in the air to produce sulfurous acid. Sulfurous acid can react with the oxygen in air to produce sulfuric acid. These acids are washed from the air by rain (or snow), and the solution can cause some corrosion of concrete and metal in buildings. Acids in the air and in the rain or snow also injure trees and other plants, as well as animals, including humans. In high concentrations, acids and acid anhydrides in the air can make breathing difficult, especially for people who are already in poor health. 

AMERCIDE (133-06-2) see captan. AMETOX (10102-17-7 NajSjOjSHjO Violent reaction with strong oxidizers metal nitrates, nitrites. Forms explosive product with potassium nitrate, sodium nitrate. Reacts with acids, forming sulfur dioxide. Incompatible with halogens. 

BROMURO de AZUFRE (Spanish) (13172-31-1) Combustible liquid. Reacts with moisture in air, steam, or oxidizers, emitting fumes of hydrogen bromide and sulfur dioxide. Reacts with water, forming hydrobromic acid and fumes of hydrogen bromide and sulfur dioxide. Violent reaction with strong oxidizers, chromyl chloride, diethylzinc, dimethyl sulfoxide, lead dioxide, nitric acid, potassium. Incompatible with hexafluoroisopropylide-neaminolithium, iron sulfide, nickel, red phosphorus. Attacks most metals in the presence of moisture. 

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