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Complexes of [Re(CO)3Cl] with different oxidation states of the polyfunctional bmtz/H2bmtz ligand system (bmtz = 3,6-bis(2-pyrimidyl)-1,2,4,5-tetrazine)

, , , und . Inorganica Chimica Acta, 357 (12): 3657--3665 (2004)
DOI: 10.1016/j.ica.2004.03.056

Zusammenfassung

Combining fac-[Re(CO)3Cl] with components of the ligand redox system bmtz/bmtz·-/H2bmtz/H2bmtz.bul.- (bmtz = 3,6-bis(2-pyrimidyl)-1,2,4,5-tetrazine) gave (H2bmtz)Re(CO)3Cl, (m-H2bmtz)[Re(CO)3Cl]2 and (m-bmtz)[Re(CO)3Cl]2. Other species characterized were (bmtz)Re(CO)3Cl (UV/visible, IR), [(H2bmtz)Re(CO)3Cl].bul.- (UV/visible, IR, EPR), (μ-H2bmtz)[Re(CO)3Cl]2.bul.- (UV/visible, IR, EPR) and (μ-bmtz)[Re(CO)3Cl]2.bul.- (UV/visible, IR, X band and high-field EPR). The results confirm bmtz as very strong and H2bmtz as moderate p acceptor ligand vs. one or two chelate-bonded low-valent metal centers. Reactivity is obsd. in terms of oxidative proton and reductive chloride dissocn. [on SciFinder(R)]

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