Oxoalkyls of Rhenium-(V) And-(VI)
X-Ray crystal structures of (Me₄ReO)₂Mg(thf)₄, [(Me₃SiCH₂)₄ReO]₂Mg(thf)₂, Re₂O₃Me₆ and Re₂O₃(CH₂SiMe₃)₆
The interaction of Grignard reagents with Re2O7, [Me3NH] [ReO4], ReOCl4, or ReOCl3(PPh3)2 leads to the diamagnetic rhenium(V) complexes (Me4ReO)2Mg(thf), and [(Me3SiCH2)4ReO]2Mg(thf)2 (thf = tetrahydrofuran) whose structures have been determined by X-ray crystallography and shown to consist of Mg2+ co-ordinated by thf and R4ReO- (R = Me or CH2SiMe3). Both rhenium(V) species can be oxidised to the previously known rhenium(VI) compounds ReOR4 and Re2O3(CH2SiMe3)6. A novel high-yield synthesis of Re2O3(CH2SiMe3)6 and the preparation of the previously unknown Re2O3Me6 are reported. The X-ray crystal structures of these compounds have been determined to reveal linear Re-O-Re bridges with mutually trans-Re=O groups. An o-xylenediyl complex [o-(CH2)2C6H4]2ReO 2Mg(thf)4 has also been characterised.
P. Stavropoulos et al., "Oxoalkyls of Rhenium-(V) And-(VI)," Journal of the Chemical Society, Dalton Transactions, Royal Society of Chemistry, Jan 1985.
The definitive version is available at http://dx.doi.org/10.1039/DT9850002167
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© 1985 Royal Society of Chemistry, All rights reserved.