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Komplekse van chroom (O) met karbeenligande
Dissertation (MSc (Chemistry))--University of Pretoria, 1986.
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| Format: | Thesis |
| Language: | Afr |
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University of Pretoria
2024
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| _version_ | 1867613586564579328 |
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| access_status_str | Open Access |
| author2 | Lotz, Simon |
| author_browse | Lotz, Simon |
| author_facet | Lotz, Simon |
| collection | Thesis |
| dc_rights_str_mv | © 2024 University of Pretoria. All rights reserved. The copyright in this work vests in the University of Pretoria. No part of this work may be reproduced or transmitted in any form or by any means, without the prior written permission of the University of Pretoria. |
| description | Dissertation (MSc (Chemistry))--University of Pretoria, 1986. |
| format | Thesis |
| id | oai:repository.up.ac.za:2263/99494 |
| institution | University of Pretoria (South Africa) |
| language | Afr |
| last_indexed | 2026-06-10T12:38:29.922Z |
| license_str | Other — see source repository |
| provenance_str_mv | Harvested via OAI-PMH from UPSpace — University of Pretoria Institutional Repository |
| publishDate | 2024 |
| publishDateRange | 2024 |
| publishDateSort | 2024 |
| publisher | University of Pretoria |
| publisherStr | University of Pretoria |
| record_format | dspace |
| source_str | UPSpace — University of Pretoria Institutional Repository |
| spelling | oai:repository.up.ac.za:2263/99494 Komplekse van chroom (O) met karbeenligande Lotz, Simon Van den Berg, Magda Chroom (o) Karbeenligande UCTD Dissertation (MSc (Chemistry))--University of Pretoria, 1986. This study comprises the syntheses, reactions and structures of some new metallocyclic chelates of chromium(O) with N, Sand O donor-atoms. Reactions of .£_-lithiated organoreagents Q-RXC 6H4Li;X=O,S,NMe and R=Me) with Cr(C0) 6 followed by alkylation with [Et3o] [BF 4], gave a new series of neutral penta- and tetracarbonyl(carbene)chromium(O) complexes of general formulae Cr{C(0Et)C 6H4XR-.£_}(C0) 5 and Cr{C(OEt)C 6H4XR-.£_}(C0) 4. These complexes could also be made photochemically. A crystal structure determination was undertaken for the complex Cr{C(OEt)C 6H4NMe 2-~}(C0) 4. The carbene unit in the tetracarbonyl complexes, Cr{C(OEt)C 6H4XR-~}(C0) 4, reacts with NH 3 to yield the chelate complexes Cr{C(NH 2)C 6H4XR-.£_}(C0) 4. N,N-dimethylhydrazine reacts with Cr{C(OEt)C 6H4SMe-.£_}(C0) 4 via formal NH insertion into the metal-carbene bond, to yield the chelate complex Cr{NHC(OEt)C 6H4SMe-.£_}(C0) 4. Reaction of 13-lithiated sulphide (PhSCH = CH - Li+) with Cr(C0)6 and subse= quent alkylation with [Et 3 0] [BF 4] results in neutral (carbene-thio) che= lates Cr{C(OEt)C(OEt) =CHCH2S(Ph)}(C0)4 and Cr{C(OEt)CH =CHS(Ph)}(C0) 4 The sulphide, PhCH 2SH, was reacted in a carbene substitution reaction with the carbene complex Cr{C(OEt)Ph}(C0)5 to produce the corresponding neutralpentacarbonyl(thiocarbene)chromium(O) complexes of general formulae Cr{C(SCH 2Ph)Ph}(C0)5 and Cr{C(SCH 2Ph) 2}(C0) 5. Chemistry MSc (Chemistry) 2024-11-27T09:16:00Z 2024-11-27T09:16:00Z 22/01/21 1986 Dissertation http://hdl.handle.net/2263/99494 Afr © 2024 University of Pretoria. All rights reserved. The copyright in this work vests in the University of Pretoria. No part of this work may be reproduced or transmitted in any form or by any means, without the prior written permission of the University of Pretoria. application/pdf University of Pretoria |
| spellingShingle | Chroom (o) Karbeenligande UCTD Komplekse van chroom (O) met karbeenligande |
| title | Komplekse van chroom (O) met karbeenligande |
| title_full | Komplekse van chroom (O) met karbeenligande |
| title_fullStr | Komplekse van chroom (O) met karbeenligande |
| title_full_unstemmed | Komplekse van chroom (O) met karbeenligande |
| title_short | Komplekse van chroom (O) met karbeenligande |
| title_sort | komplekse van chroom o met karbeenligande |
| topic | Chroom (o) Karbeenligande UCTD |
| url | http://hdl.handle.net/2263/99494 |