Chelate Ligands for the Stabilisation of Low-Valent Main Group Compounds
Chelatliganden zur Stabilisierung von Niedervalenten Hauptgruppenverbindungen
| dc.contributor.advisor | Stalke, Dietmar Prof. Dr. | |
| dc.contributor.author | Kretsch, Johannes | |
| dc.date.accessioned | 2021-09-28T10:30:21Z | |
| dc.date.available | 2021-10-04T00:50:15Z | |
| dc.date.issued | 2021-09-28 | |
| dc.identifier.uri | http://hdl.handle.net/21.11130/00-1735-0000-0008-591D-5 | |
| dc.identifier.uri | http://dx.doi.org/10.53846/goediss-8828 | |
| dc.language.iso | eng | de |
| dc.publisher | Niedersächsische Staats- und Universitätsbibliothek Göttingen | de |
| dc.rights.uri | http://creativecommons.org/licenses/by-nc-nd/4.0/ | |
| dc.subject.ddc | 540 | de |
| dc.title | Chelate Ligands for the Stabilisation of Low-Valent Main Group Compounds | de |
| dc.title.alternative | Chelatliganden zur Stabilisierung von Niedervalenten Hauptgruppenverbindungen | de |
| dc.type | doctoralThesis | de |
| dc.contributor.referee | Meyer, Franc Prof. Dr. | |
| dc.date.examination | 2021-08-25 | |
| dc.description.abstracteng | Reviewing the achievements in Group 13 metal complexes over the last decades, the main area of research is emerging to the development and utilisation of low-valent aluminium compounds and their heavier homologues. This work essentially focuses on synthesising low-valent group 13 complexes based on bis(benzoxazol-2-yl)methane derivates. Starting from the unsubstituted bis(benzoxazol-2-yl)methane and the bis(4-methyl-benzoxazol-2-yl)methane ligands, alkali metal precursor complexes were synthesised by concerted deprotonation-metalation reaction with corresponding metal-organic reagents. Heavier low-oxidation state group 13 metallacycles comprising bis(4-methyl-benzoxazol-2-yl)methanide were accessible by salt elimination reaction with metal(I) salts. Furthermore, aluminium(III) hydride or halide species were isolated and reduced to dimeric aluminium(II) bis(4-methyl-benzoxazol-2-yl)methanide compounds. It could be shown that the planar bis(4-methyl-benzoxazol-2-yl)methanide forms dimeric or trimeric trial metal compounds caused by its less steric hindrance in the third dimension. Therefore, bulkier bis(4-benzhydryl-benzoxzol-2-yl)methane was synthesised starting with 2-ansidine. With this ligand in hand, monomeric M(I) compounds (M(I) = Ga, In, Tl) were obtained by salt elimination reaction of alkali metal bis(4-methyl-benzoxazol-2-yl)methanide and triel(I) salts. Additionally, aluminium(III) complexes synthesised, and first reduction attempts were carried out to obtain an Al(I) compound. The trifold deprotonation of bis(4-benzhydryl-benzoxzol-2-yl)methane was accomplished by KH/18-crown-6 or a Schlosser base. These trianionic species were reacted with group 13 metall(III) halides, however, only for indium(III) a square-pyramidal complex could be observed. All obtained compounds were thoroughly investigated (e.g. Single crystal XRD, NMR, MS, EA) all by differing analytical methods. | de |
| dc.contributor.coReferee | Alcarazo, Manuel Prof. Dr. | |
| dc.contributor.thirdReferee | Mata, Ricardo Prof. Dr. | |
| dc.contributor.thirdReferee | Otte, Matthias Dr. | |
| dc.contributor.thirdReferee | Walker, Johannes C. L. Prof. Dr. | |
| dc.subject.eng | Bis(benzoxazol-2-yl)methane derivatives | de |
| dc.subject.eng | Low-valent main group compounds | de |
| dc.subject.eng | Group 13 metal coordination | de |
| dc.subject.eng | Metal organic chemistry | de |
| dc.subject.eng | Aluminium complexes | de |
| dc.subject.eng | Structure analysis | de |
| dc.identifier.urn | urn:nbn:de:gbv:7-21.11130/00-1735-0000-0008-591D-5-1 | |
| dc.affiliation.institute | Fakultät für Chemie | de |
| dc.subject.gokfull | Chemie (PPN62138352X) | de |
| dc.description.embargoed | 2021-10-04 | |
| dc.identifier.ppn | 177199827X |