BRUNNER, H and GRASSL, R and MEIER, W and WACHTER, J and NUBER, B and ZIEGLER, ML (1992) INFLUENCE OF DIFFERENTLY SUBSTITUTED CYCLOPENTADIENYL LIGANDS ON CHEMISTRY OF ORGANOMETAL COMPLEXES WITH SULFUR. JOURNAL OF ORGANOMETALLIC CHEMISTRY, 434 (1). pp. 63-78. ISSN 0022-328X,
Full text not available from this repository.Abstract
The reaction of the differently substituted cyclopentadienyl complexes L2M2(CO)4 with sulfur is investigated with respect to the ligand L (etmcp = ethyltetramethylcyclopentadienyl, tbcp = t-butylcyclopentadienyl, ipcp = isopropylcyclopentadienyl) and the metal M (Cr, Mo, W). For M = Cr the only isolated product is etmcp2Cr2S5. For M = Mo three isomers A, D, E of composition L2Mo2S4 (L = ipcp, etmcp) are formed whereas only two isomers (A, D) exist for L = tbcp. Only two isomers (D, E) of composition L2W2S4 are formed in the system L2W2(CO)4/S8, a further product is L2W2(CO)2S3 for L = etmcp. Structural characterisation of all compounds was achieved by IR, H-1, and Mo-95 NMR spectroscopy, whereas the structures of syn-etmcp2M2(mu-S)2S2 (M = Mo, W) were determined by X-ray crystallography, the result of which allows the correction of a previous structure assignment. It is further shown that a thermal equilibrium exists between L2Mo2(mu,eta-2-S2)(mu-S)2 (A) and syn-L2Mo2(mu-S)2S2 (D) which depends strongly on the ligands.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | TRIPLE BOND; CRYSTAL-STRUCTURES; SULFIDO LIGANDS; MO-95 NMR; REACTIVITY; MOLYBDENUM; TUNGSTEN; DIMERS; ANION; MO; |
| Depositing User: | Dr. Gernot Deinzer |
| Last Modified: | 19 Oct 2022 08:44 |
| URI: | https://pred.uni-regensburg.de/id/eprint/54428 |
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