Abstract
Reduction of the bent-sandwich [·5-(Ph)Ind]2HfCl2 complex (1) (where (Ph) Ind is the 2-phenylindenyl anion) in a THF medium was studied by low-temperature cyclic voltammetry. Complex1 is stable in THF at a temperature lower than −50°C and undergoes reversible one-electron reduction to radical anion1 . −. Further one-electron reduction of1 . − to dianion1 2− is accompanied by the elimination of two Cl− ions to form the bisindenyl sandwich [·5-(Ph)Ind]2Hf complex (2). This complex can undergo reversible one-electron reduction to the corresponding radical anion2 . −, which is stable within the cyclic voltammetry time scale. AtT=−30°C in a THF solution, complex1 was reduced to a diamagnetic (apparently, binuclear) HfIII complex, which was characterized by cyclic voltammetry. Synthesis and the crystal structure of complex1 are reported.
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Translated fromIzvestiya Akademii Nauk. Seriya Khimicheskaya, No. 12, pp. 2161–2165, December, 1997.
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Bazhenova, T.A., Antipin, M.Y., Babkina, O.N. et al. Synthesis, crystal structure, and reduction of bis(2-phenylindenyl)hafnium dichloride. Russ Chem Bull 46, 2048–2052 (1997). https://doi.org/10.1007/BF02495250
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DOI: https://doi.org/10.1007/BF02495250