Please use this identifier to cite or link to this item: https://doi.org/10.1016/j.jorganchem.2004.06.017
Title: Oxalate-bridged dirhenium(I) hexacarbonyl complexes: Synthesis, reactions, and crystal structures
Authors: Zhang, R.
Kee, C.L.
Leong, W.K. 
Yan, Y.K.
Keywords: Carbonyl
Carboxylate
Oxalate
Phosphine
Rhenium
trans-1,2-Bis(diphenylphosphino)ethylene
Issue Date: 1-Sep-2004
Citation: Zhang, R., Kee, C.L., Leong, W.K., Yan, Y.K. (2004-09-01). Oxalate-bridged dirhenium(I) hexacarbonyl complexes: Synthesis, reactions, and crystal structures. Journal of Organometallic Chemistry 689 (17) : 2837-2844. ScholarBank@NUS Repository. https://doi.org/10.1016/j.jorganchem.2004.06.017
Abstract: The complex [{Re(CO)5}2(μ,η1 -C2O4)] 1 undergoes thermal decarbonylation to give [Re2(CO)6(C2O4)] n, which reacts with triphenylphosphine and trans-1,2-bis(diphenylphosphino)ethylene (dppene) to give anti-[Re2(PPh3)2(CO)6 (μ,η2:η2-C2O4)] 2 and [Re2(μ-dppene)2(CO)6μ, η2:η2-C2O4)],4 respectively. Complex 2 is oxidized on prolonged exposure to air (1 week) to form anti -[Re2(OPPh3)2 (CO)6(μ.η2:η2 -C2O4)], 3. In the presence of excess dppene, the complex [Re2(μ-dppene)2(CO)6 (μ.η1:η1-C2O4)], 5 is also formed alongside 4 . With the chelating diphosphine 1,3-bis(diphenylphosphino)propane (dppp), the complex [(η2-dppp)Re(CO)3 (μ.η1: η1-C2O4)Re(CO)3 (η2-dppp)] 6 is formed. The structures of 3 and 4 have been determined by X-ray crystallography. The dppene ligand in complex 4 adopts an unusual "syn" conformation wherein the two phosphorus lone pairs of electrons are eclipsed, thus forming an "A-frame" type of bridge. © 2004 Elsevier B.V. All rights reserved.
Source Title: Journal of Organometallic Chemistry
URI: http://scholarbank.nus.edu.sg/handle/10635/94465
ISSN: 0022328X
DOI: 10.1016/j.jorganchem.2004.06.017
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