Reaction of 3,3-di-tert-butylthiirane-2-thione S-oxide (α-dithiolactone S-oxide): synthesis of thiolato sulfinato-platinum and palladium complexes

Thermolysis of 3,3-di-tert-butylthiirane-2-thione S-oxide 4 gave di-tert-butyl ketone 5 and carbon disulfide (CS2). Treatment of α-dithiolactone S-oxide 4 with excess m-CPBA or triphenylphosphine gave di-tert-butylthioketene S-oxide 3 almost quantitatively. Treatment of 4 with (η2-ethylene)bis(triphenylphosphine)platinum(0) 13 or tetrakis(triphenylphosphine) palladium 17 resulted in the formation of thiolato sulfinato–platinum complex 15 or palladium complex 18, respectively. The structure of complex 15 was determined by X-ray crystallographic analysis.