Synthesis, structures, and reactivities of some pentamethylcyclopentadienyl–sulphur compounds
- 1 January 1985
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in J. Chem. Soc., Dalton Trans.
- No. 7,p. 1303-1307
- https://doi.org/10.1039/dt9850001303
Abstract
The pentamethylcyclopentadienyl–sulphur compounds S(C5Me5)2(1) and S2(C5Me5)2(2) have been prepared by the reaction of Li(C5Me5) with SCL2 and S2Cl2, respectively. Compounds (1) and (2) were characterised by n.m.r. and mass spectroscopy. The X-ray crystal structure of (1) has been determined. Compound (1) crystallises in the monoclinic space group P21/c(no. 14), with a= 10.375(2), b= 11.274(2), c= 16.132(9)Å, β= 91.92(3)°, and Z= 4. The reaction of (1) with [Fe2(CO)9] results in the known cluster compound, [Fe3S2(CO)9](3), the identity of which was confirmed by X-ray crystallography. Unsuccessful attempts were made to prepare cations of the type [S(C5Me5)2]n+ by (i) oxidation of (1) and (2), or (ii) the reaction of S(C5Me5)Cl (prepared in situ) with Al2Cl6. Cyclic voltammetric experiments on (1) and C5Me5H suggest that oxidation occurs at the carbocyclic ring rather than at the sulphur atom.Keywords
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