BRUNNER, H and GEHART, G and MEIER, W and WACHTER, J and BURGEMEISTER, T (1995) CHEMICAL EVIDENCE FOR THE EXISTENCE OF PERALKYLATED NIOBOCENE IN A FULVENOID FORM BY ITS REACTION WITH SULFUR. JOURNAL OF ORGANOMETALLIC CHEMISTRY, 493 (1-2). pp. 163-166. ISSN 0022-328X,
Full text not available from this repository.Abstract
Completely reduced Cp(2)(*) NbCl2 (Cp* = eta(5)-C(5)Me(5)) solutions (two equivalents of Na-Hg) which were previously supposed to contain two isomers A and B of decamethylniobocene react with sulfur to give products 1-4. Their H-1 and C-13 NMR spectroscopy investigations allow for the first time a clear assignment of the structures of A and B. As 1 and 2 are identical with the previously reported Cp(2)(*) Nb(eta-S-2)L derivatives (L = H (1), SH (2)) a bent niobocene structure follows for isomer A. Products 3 and 4 are in agreement with structures involving a eta(1):eta(5)-tetramethylfulvene ligand which in the case of 4 is slightly modified by sulfur insertion into the CH2-Nb bond. Thus the structure of isomer B may be derived from bent niobocene by a hydride migration from one CH3 group to Nb.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | COMPLEXES; HYDROGEN; CHEMISTRY; NITROGEN; ELECTRON; NIOBIUM; PERALKYLATED NIOBOCENE; NMR-SPECTROSCOPY; SULFUR; FULVENE |
| Depositing User: | Dr. Gernot Deinzer |
| Last Modified: | 19 Oct 2022 08:37 |
| URI: | https://pred.uni-regensburg.de/id/eprint/52536 |
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