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Syntheses and spectroscopic studies of new cobalt(I) complexes
Dissertation (MSc (Chemistry))--University of Pretoria, 1989.
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| Format: | Thesis |
| Language: | English |
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University of Pretoria
2022
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| _version_ | 1867613707697127424 |
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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 | © 2020 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, 1989. |
| format | Thesis |
| id | oai:repository.up.ac.za:2263/85305 |
| institution | University of Pretoria (South Africa) |
| language | English |
| last_indexed | 2026-06-10T12:40:25.890Z |
| license_str | Other — see source repository |
| provenance_str_mv | Harvested via OAI-PMH from UPSpace — University of Pretoria Institutional Repository |
| publishDate | 2022 |
| publishDateRange | 2022 |
| publishDateSort | 2022 |
| 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:2263/85305 Syntheses and spectroscopic studies of new cobalt(I) complexes Lotz, Simon Loubser, Christa UCTD Syntheses spectroscopic studies new cobalt(I) complexes Dissertation (MSc (Chemistry))--University of Pretoria, 1989. The new Co(I) complexes [Me3SnCo(CO)aL] (L = PPh3, P(OPh)a, AsPh3) are prepared by reductively cleaving the dimers [Co(CO)3L]2 on a sodium amalgam, followed by the addition of Me3SnCl. A synthetic procedure is developed to prepare and purify these compounds on a large scale. A previous report that [Co(CO)3AsPh3]2 cannot be reductively cleaved without decomposition is proved wrong. The new products prove sufficiently stable to enable them to be studied by ir, nmr (1H, 13C{1H}, 31p{1H}, 119 Sn{1H}) and mass spectroscopy. The compounds [Me3SnCo(CO)aL] (L = PPh3, P(OPh)3, AsPh3) are shown to be non-susceptible towards nucleophilic substitution. Attempted displacement of a carbonyl ligand by an isocyanide ligand (using an excess of the latter) after treatment with the labilising agent Me3NO, leads to a variety of products of which only the major one can be identified as tra11,9-Co(CNR)aL2][PF 6] (R - t-Bu, Ph, 2,6-dimethylphenyl; L = PPh3, P(OPh)3, AsPh3). Except for the case where R = t-Bu, L = PPh3, the products are extremely unstable oils and cannot be characterised properly. Chemistry MSc (Chemistry) Unrestricted 2022-05-17T11:20:03Z 2022-05-17T11:20:03Z 2021/10/27 1989 Dissertation * https://repository.up.ac.za/handle/2263/85305 en © 2020 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 | UCTD Syntheses spectroscopic studies new cobalt(I) complexes Syntheses and spectroscopic studies of new cobalt(I) complexes |
| title | Syntheses and spectroscopic studies of new cobalt(I) complexes |
| title_full | Syntheses and spectroscopic studies of new cobalt(I) complexes |
| title_fullStr | Syntheses and spectroscopic studies of new cobalt(I) complexes |
| title_full_unstemmed | Syntheses and spectroscopic studies of new cobalt(I) complexes |
| title_short | Syntheses and spectroscopic studies of new cobalt(I) complexes |
| title_sort | syntheses and spectroscopic studies of new cobalt i complexes |
| topic | UCTD Syntheses spectroscopic studies new cobalt(I) complexes |
| url | https://repository.up.ac.za/handle/2263/85305 |