Abstract
A new and efficient method for oxidising sulfides selectively to sulfoxides has been developed with atmospheric oxygen, in the presence of isobutyraldehyde and catalysed by NiII complexes such as bis[1,3-bis-(p-methoxyphenyl)-1,3-propanedionato]nickel, [Ni(dmp)2], and bis[acetylacetonato]nickel, [Ni(acac)2].