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X-ray and NMR spectropscopic studies of selected heterocyclic compounds of phosphorus and nitrogen
Dissertation (MSc (Chemistry))--University of Pretoria, 2007.
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University of Pretoria
2013
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| _version_ | 1867613571354984448 |
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| access_status_str | Open Access |
| author2 | Modro, T.A. |
| author_browse | Modro, T.A. |
| author_facet | Modro, T.A. |
| collection | Thesis |
| dc_rights_str_mv | © 2000 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, 2007. |
| format | Thesis |
| id | oai:repository.up.ac.za:2263/27657 |
| institution | University of Pretoria (South Africa) |
| last_indexed | 2026-06-10T12:38:15.902Z |
| license_str | Other — see source repository |
| provenance_str_mv | Harvested via OAI-PMH from UPSpace — University of Pretoria Institutional Repository |
| publishDate | 2013 |
| publishDateRange | 2013 |
| publishDateSort | 2013 |
| 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:2263/27657 X-ray and NMR spectropscopic studies of selected heterocyclic compounds of phosphorus and nitrogen Modro, T.A. upetd@up.ac.za Mampa, Richard Mokome Chemistry analytic heterocyclic compounds ohospho Chemistry analytic heterocyclic compounds nitrogen UCTD Dissertation (MSc (Chemistry))--University of Pretoria, 2007. A full IH, l3C and 31P NMR assignments of phosphoric triamides 1-oxo-2,8-diphenyl-2,5,8-triaza-l-phosphabicyclo [3.3.0]octane (1), l-oxo-lO-phenyl-4,7,lO-triaza-2.3-benzo-l-phoshabicyclo [5.3.0]decane (2) and 1-oxo-4,7,lO-triaza-2,3,11,12-dibenzo-l-phosphabicyclo[5.5.0]dodecane (3) which have been recently synthesised was accomplished. The solution state NMR analysis of these compounds showed a number of interesting spin systems upon moving from 1→2→3, spanning from ABC to ABCDX spin systems where X is phosphorus nucleus. The three systems showed a high degree of rigidity in solution state, which made it possible to compare dihedral/torsion angles determined from solution state NMR with those of X-ray diffraction data. Both X-ray diffraction and NMR analysis supported the molecular conformations. A significant solvent effect was observed for solutions of compounds 1, 2 and 3 in benzene-d6 compared to solutions in chloroform-d1 and acetone. Benzene-d6 showed a generally upfield chemical shift of methylene protons in particular, and this is assumed to be due to different solvent-substrate interactions and to the magnetic anisotropic effect of the solvent. Chemistry unrestricted 2013-09-07T11:57:17Z 2006-02-13 2013-09-07T11:57:17Z 2001-09-01 2007-02-13 2006-02-09 Dissertation Mampa, RM 2000, X-ray and NMR spectroscopic studies of selected heterocyclic compounds of phosphorus and nitrogen, MSc dissertation, University of Pretoria, Pretoria, viewed yymmdd < http://hdl.handle.net/2263/27657 > H799/ag http://hdl.handle.net/2263/27657 http://upetd.up.ac.za/thesis/available/etd-02092006-155713/ © 2000 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 | Chemistry analytic heterocyclic compounds ohospho Chemistry analytic heterocyclic compounds nitrogen UCTD X-ray and NMR spectropscopic studies of selected heterocyclic compounds of phosphorus and nitrogen |
| title | X-ray and NMR spectropscopic studies of selected heterocyclic compounds of phosphorus and nitrogen |
| title_full | X-ray and NMR spectropscopic studies of selected heterocyclic compounds of phosphorus and nitrogen |
| title_fullStr | X-ray and NMR spectropscopic studies of selected heterocyclic compounds of phosphorus and nitrogen |
| title_full_unstemmed | X-ray and NMR spectropscopic studies of selected heterocyclic compounds of phosphorus and nitrogen |
| title_short | X-ray and NMR spectropscopic studies of selected heterocyclic compounds of phosphorus and nitrogen |
| title_sort | x ray and nmr spectropscopic studies of selected heterocyclic compounds of phosphorus and nitrogen |
| topic | Chemistry analytic heterocyclic compounds ohospho Chemistry analytic heterocyclic compounds nitrogen UCTD |
| url | http://hdl.handle.net/2263/27657 http://upetd.up.ac.za/thesis/available/etd-02092006-155713/ |