Reversible radical complex formation of an organometallic diplatinum(IV) compound

, , , , , und . Journal of Organometallic Chemistry 692 (15): 3151--3155 (2007)


Crystallog. characterized anti-(m-bmptz)fac-PtBrMe32, bmptz = 3,6-bis(2-(4-methylpyridyl))-1,2,4,5-tetrazine, could be reversibly reduced at -0.36 V vs. FeCp2+/° in CH2Cl2/0.1 M Bu4NPF6 to a persistent anion. Despite the presence of two conjugatively coupled platinum(IV) centers and the bromide ligands as potential leaving groups it is the bridging bmptz ligand which accepts the added electron within the tetrazine ring as evident from EPR and UV-Vis spectroelectrochem. of that diplatinum(IV) radical complex. The function of the Me groups in the fac-PtMe3+ ions is discussed in contrast with the related entity fac-Re(CO)3+. on SciFinder(R)

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