Spectroscopic Characterization of a Monomeric, Cyclopentadienyl-Based Rhenium(V) Dioxo Complex
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https://figshare.com/articles/dataset/Spectroscopic_Characterization_of_a_Monomeric_Cyclopentadienyl_Based_Rhenium_V_Dioxo_Complex/2005704
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资源简介：
Mononuclear,
coordinatively unsaturated rhenium(V) dioxo species of the type XReO2 (X = Me, substituted cyclopentadienyl) have long been postulated
as intermediates in rhenium-catalyzed deoxydehydration, but their
characterization was precluded because of aggregation into dimeric
or oligomeric structures. Using the bulky 1,2,4-tri-tert-butylcyclopentadienyl (Cpttt) ligand, the rhenium(V)
dioxo species (Cpttt)ReO2 could now be observed,
in equilibrium with the dimeric form [(Cpttt)Re(O)μ-O]2, and characterized by NMR, IR, and UV–vis spectroscopies,
as well as electrospray ionization mass spectrometry. (Cpttt)ReO2 is shown to be the primary product of reduction
of the rhenium(VII) complex (Cpttt)ReO3 with
PPh3 and demonstrated to react with ethylene glycol significantly
faster than its dimeric counterpart, supporting its role as an intermediate
in rhenium-catalyzed deoxydehydration reactions.
创建时间：
2015-11-16
