Facial coordination of cyclooctatetraene to a Co2Ni triangle in a heterometallic trinuclear cluster complex |
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| Institution: | 1. REQUIMTE-LAQV, Departamento de Química e Bioquímica, Faculdade de Ciências, Universidade do Porto, 4069-007 Porto, Portugal;2. Centro de Química, Campus de Gualtar, Universidade do Minho, 4710-057 Braga, Portugal;3. Advanced Imaging Research Center, University of Texas Southwestern Medical Center at Dallas, 5323 Harry Hines Blvd, Dallas, TX 75390, USA;4. Department of Inorganic and Analytical Chemistry, Faculty of Science and Technology, University of Debrecen, Egyetem tér 1, H-4010 Debrecen, Hungary;5. Department of Life Sciences, University of Coimbra, Coimbra, Portugal;6. Coimbra Chemistry Center, University of Coimbra, Coimbra, Portugal |
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| Abstract: | Reaction of (η-C5H5)NiCo3(CO)9] (5) with 1,3,5,7-cyclooctatetraene or 1,4-(SiMe3)2C8H6, respectively, yields the complexes Co2Ni(CO)6(μ3-η8-C8H6R2)] (R=H, SiMe3) (7a, b). Dramatic modifications of the tetrametallic cluster core and the ligand sphere of 5 to give the trinuclear complex 7 are driven by the preference of the cyclopolyenes for facial (μ3-η8) coordination. The title complexes are the first examples of facial cyclooctatetraene coordination to a heterometallic (Co2Ni) triangle. |
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