BRUNNER, H and GEHART, G and MEIER, W and WACHTER, J and NUBER, B (1993) FROM CP+2NB(ETA-2-S2)H TO CP+3NB3S12 - REACTIVITY STUDIES ON NIOBOCENE SULFIDES. JOURNAL OF ORGANOMETALLIC CHEMISTRY, 454 (1-2). pp. 117-122. ISSN 0022-328X,
Full text not available from this repository.Abstract
The reaction of Cp+2bBH4 with sulfur gives two isomers of composition Cp+2NbS2H (3, 4) and Cp+2NbS3H (5). The structures of 3-5 have been investigated by IR and H-1 NMR spectroscopic means. X-Ray diffraction analyses have been performed on 3 and 4. These investigations demonstrate that 3 and 4 are niobocene derivatives, in which either a eta2-S-2(2)--ligand and a hydride (3) or a S2- and a SH- ligand (4) are attached to the Nb center. Complex 3 can be transformed thermally into 4 by a S-S bond rupture, followed by the insertion of sulfur into the Nb-H bond. The polynuclear compounds Cp+3Nb3S7 (6) and Cp+3Nb3S12 (7) can be formed by the reaction of 3 with S8. The role of polysulfide intermediates is discussed.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | POLYSULFIDE COMPLEXES; SULFUR CHEMISTRY; NIOBIUM; HYDRIDE; LIGANDS; |
| Depositing User: | Dr. Gernot Deinzer |
| Last Modified: | 19 Oct 2022 08:42 |
| URI: | https://pred.uni-regensburg.de/id/eprint/53876 |
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