CAS:128008-30-0 | Indium(III) Trifluoromethanesulfonate

The compound corresponding to CAS 128008-30-0 is Indium(III) Trifluoromethanesulfonate, referred to as In(OTf)₃, with a molecular formula of C₃F₉InO₉S₃ and a molecular weight of 562.03 g/mol. This compound belongs to the class of metal organic salts, has strong Lewis acidity, and has important application value in the fields of organic synthesis, catalytic reaction and new material development.
Indium(III) Trifluoromethanesulfonate is a white to off-white powder at room temperature, which is easy to absorb moisture and needs to be sealed for storage. Its density is 1.7 g/cm³, and its melting point is about 100–120°C (decomposition). This compound is easily soluble in polar organic solvents (such as methanol, acetonitrile, and dichloromethane).

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As a typical Lewis acid catalyst, Indium(III) Trifluoromethanesulfonate's core function is to accept electron pairs through empty orbitals to promote the formation of reaction intermediates.
Its main chemical properties include:
Acid catalytic activity: It performs well in reactions such as esterification, condensation, and cyclization, such as catalyzing the esterification of alcohols and carboxylic acids, or the condensation of aldehydes and ketones with amines.
Water resistance: Compared with other Lewis acids (such as AlCl₃ and BF₃), In (OTf)₃ is more stable in a humid environment and can be used in aqueous or moisture-sensitive reaction systems.
Selective regulation: Stereoselective catalysis can be achieved through ligand design or optimization of reaction conditions, such as inducing the formation of products with specific configurations in the Diels-Alder reaction.

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