Welcome to LookChem.com Sign In|Join Free

Article Doi

Preparation, Structure and Reactivity of the Binuclear Di-μ-oxo-bis Complex

DOI: 10.1039/DT9930002621

Source and publish data:

Journal of the Chemical Society, Dalton Transactions p. 2621 - 2628 (1993)

Update date:2022-08-05

Topics:

Authors:

Ikari, ShinjiIkari, Shinji

Ito, TasukuIto, Tasuku

McFarlane, WilliamMcFarlane, William

Nasreldin, MohamedNasreldin, Mohamed

Ooi, Bee-LeanOoi, Bee-Lean

et al.et al.

Read Full Text PDF DownLoad Join now for total 90,000,000 free articles

Article abstract of DOI:10.1039/DT9930002621

The dark brown dirhenium(IV) complex Ba2*4.5H2O (H4edta = ethylenediamie-N,N,N',N'-tetraacetic acid), peak at 450 nm (ε = 7880 M-1 cm-1 per dimer), has been prepared.From X-ray crystallography, the compound crystallizes in a monoclinic space group C2/c with a = 15.867(3), b = 12.914(2), c = 9.686(2) Angstroem, β = 123.40(1) deg and Z = 4.The structure is centrosymmetric, with the Re atoms having distorted octahedral co-ordination, and each tetradentate edta(4-) ligand having two unco-ordinated -CH2CO2(1-) groups.The Re2O2 ring is planar and the short Re-Re distance of 2.362(2) Angstroem is consistent with multiple metal-metal bonding.The structure is that of the meso ΔΛ form.The (1)H and (13)C NMR spectra of the uncrystallised sodium salt in aqueous solution (pH 7.5) provide evidence for both meso ΔΛ and racemic ΔΔ or ΛΛ forms.The UV-VIS and CD spectra of the (R)-pdta analogue, where pdta(4-) is propylenediamine-N,N,N',N'-tetraacetate, are also reported.The edta complex exhibits irreversible electrochemical behaviour with an oxidation wave at +1.23 V vs. the normal hydrogen electrode at = 0.10 M.Kinetic studies on the oxidation of the Re(IV)2 complex to Re(VII) with the one-equivalent reagent cis-(1+) in 1 M H(1+) indicate a rate-determining first stage with no evidence for stable intermediate states.Effects of the product (2+) and H(1+) on the kinetics, and an unexpected difference in reactivity of isomeric forms of the Re(IV)2 complex are reported.

View More

Products guided by the article

Product name:pentaaquo oxovanadium (IV) (2+)

Cas No:15391-95-4

15391-95-4

R&D Labs maybe for 15391-95-4

Relevant to this article

Hot Product