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Methanesulfonic acid (MsOH, MSA) or methanesulphonic acid (in British English) is an organosulfuric, colorless liquid with the molecular formula CH 3 SO 3 H and structure H 3 C−S(=O) 2 −OH. It is the simplest of the alkylsulfonic acids ( R−S(=O) 2 −OH ).
Methanedisulfonic acid is the organosulfur compound with the formula CH 2 (SO 3 H) 2. It is the disulfonic acid of methane. It is prepared by treatment of methanesulfonic acid with oleum. Its acid strength (pK a) is comparable to that of sulfuric acid. [3]
Methanesulfonyl azide melts at 18 °C and decomposes from 120 °C. [1] Like many other azides, it is explosive. [3] At low temperature, methanesulfonyl azide crystallizes in the triclinic crystal system in the space group P1 with the lattice parameters a = 5.6240 Å; b = 5.9498 Å, c = 7.6329 Å, α = 72.216°, β = 70.897°, and γ = 88.601°, and two molecules per unit cell.
Methanesulfonic anhydride (Ms 2 O) is the acid anhydride of methanesulfonic acid. Like methanesulfonyl chloride (MsCl), it may be used to generate mesylates (methanesulfonyl esters). Preparation & purification
Methanesulfonyl chloride is mainly used to give methanesulfonates by its reaction with alcohols in the presence of a non-nucleophilic base. [8] In contrast to the formation of toluenesulfonates from alcohols and p-toluenesulfonyl chloride in the presence of pyridine, the formation of methanesulfonates is believed to proceed via a mechanism wherein methanesulfonyl chloride first undergoes an ...
Ethyl methanesulfonate (EMS) is an organosulfur compound with the formula CH 3 SO 3 C 2 H 5.It is the ethyl ester of methanesulfonic acid.A colorless liquid, it is classified as an alkylating agent.
General structure of a sulfonic acid with the functional group indicated in blue. In organic chemistry, sulfonic acid (or sulphonic acid) refers to a member of the class of organosulfur compounds with the general formula R−S(=O) 2 −OH, where R is an organic alkyl or aryl group and the S(=O) 2 (OH) group a sulfonyl hydroxide. [1]
In organosulfur chemistry, a mesylate is any salt or ester of methanesulfonic acid (CH 3 SO 3 H). In salts, the mesylate is present as the CH 3 SO − 3 anion . When modifying the international nonproprietary name of a pharmaceutical substance containing the group or anion, the spelling used is sometimes mesilate (as in imatinib mesilate , the ...