Heterotetrametallic Re-Zn-Zn-Re Complex Generated by an Anionic Rhenium(I) beta-Diketiminate - INSA Toulouse - Institut National des Sciences Appliquées de Toulouse Access content directly
Journal Articles Journal of the American Chemical Society Year : 2019

Heterotetrametallic Re-Zn-Zn-Re Complex Generated by an Anionic Rhenium(I) beta-Diketiminate

Abstract

We report the synthesis of an anionic rhenium(I) compound, Na[Re(eta(5)-Cp)(BDI)] (1; Cp = cyclopentadienide, BDI = N,N'-bis(2,6-diisopropylphenyl)-3,5-dimethyl-beta-diketiminate) and initial investigations of its use as a strong chemical reductant and metalloligand. Chemical oxidation of 1 gives a rare example of a rhenium(II) compound Re(eta(5)-Cp)(BDI) (2), while protonation of 1 yields the rhenium(III) hydride complex Re(H)(eta(5)-Cp)(BDI) (3). The reaction of 1 with ZnCl2 generated both 2 and the zinc(I) compound [ZnRe(eta(5)-Cp)(BDI)](2) (4), which features a linear, tetrametallic Re(I)-Zn(I)-Zn(I)-Re(I) core. Computational studies of 4 were performed to characterize the metal-metal bonding interactions; the results indicate a dative interaction from rhenium to zinc and covalent bonding between the two zinc centers. One-electron oxidation of 4 yielded both 2 and the triflate-bridged zinc(II) complex [(mu-OTOZnRe(eta(5)-Cp)(BDI)](2) (5, OTf = trifluoromethanesulfonate).
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Dates and versions

hal-04022173 , version 1 (09-03-2023)

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Trevor D. Lohrey, Laurent Maron, Robert G. Bergman, John Arnold. Heterotetrametallic Re-Zn-Zn-Re Complex Generated by an Anionic Rhenium(I) beta-Diketiminate. Journal of the American Chemical Society, 2019, 141 (2), pp.800-804. ⟨10.1021/jacs.8b12494⟩. ⟨hal-04022173⟩
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