摘要:
The complex bis(mu-dimethyl sulfido)tetramethyldiplatinum(II) reacts with 1,4,7-triisopropyl-1,4,7-triazacyclopropanone (L) over the course of 24 h at room temperature in THF-d(8) to give [PtMe2(L)] and PtMe2(SMe2)(2). Subsequent addition of I mol of trifluoromethanesulfonic acid results in immediate formation of a previously unknown stable cationic complex [PtMe2H(L)]+SO3CF3-. This product can also be prepared by. oxidative addition of the N-H bond of LH+SO3CF3- to the starting complex, which points to a higher basicity of the platinum atom in [PtMe2(L)] compared with the nitrogen atom in the ligand L. The pK(a) of the cationic hydride of platinum(IV) was estimated.