Synthesis and crystal and molecular structure of bis(trimethylsilyl-methylidyne)tetrakis(trimethylsilylmethyl)dirhenium (Re–Re)
- 1 January 1980
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in J. Chem. Soc., Dalton Trans.
- No. 9,p. 1797-1799
- https://doi.org/10.1039/dt9800001797
Abstract
The complex Re2(µ-CSiMe3)2(CH2SiMe3)4 has been isolated as green crystals in small yield from the reaction of ReCl4(thf)2(thf = tetrahydrofuran) with Me3SiCH2MgCl and characterised by X-ray diffraction analysis. Crystals are triclinic, space group P, with a= 10.312(2), b= 10.703(6), c= 11.625(5)Å, α= 117.04(4), β= 64.71(3), and γ= 115.89(3)°. The structure was determined using observed data and refined to an R of 0.0376. The molecule has (Ci) symmetry with a planar, central Re2C2 ring. The carbyne ligands bridge symmetrically with the Re–C multiple bond component delocalised. The Re–Re distance of 2.557 Å is rather long, but is still considered compatible with a metal–metal double bond.Keywords
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