| dc.contributor.author | Royan, Bruce William. | en_US |
| dc.date.accessioned | 2014-10-21T12:35:24Z | |
| dc.date.available | 1990 | |
| dc.date.issued | 1990 | en_US |
| dc.identifier.other | AAINN64614 | en_US |
| dc.identifier.uri | http://hdl.handle.net/10222/55241 | |
| dc.description | In part I of the thesis, the preparation and characterisation of a series of heteronaphthalenic cations, 1*, are described. 1 contain previously unreported $p\pi$-bonding between sulphur and the heavier elements of Group 15 (P, As, Sb). The cations are stabilised by a combination of positive charge, a weakly nucleophilic counter ion and a Hueckel, 10$\pi$-electron count. The thermodynamic stability of 1 is demonstrated by the near planar structures of the halothiazapnictoles, 2g(Cl),g(Br),h. Attempts to prepare non-aromatic derivatives of 1 have resulted in the isolation of novel heterocyclic dications, 21, 24. | en_US |
| dc.description | Part II of the thesis contains a comprehensive spectroscopic and structural study of the Lewis acid-base adducts, Ph$\sb3$PCh.AlCl$\sb3$ (Ch = O, S, Se). Ph$\sb3$PO.AlCl$\sb3$ exhibits a unique linear backbone both in solution and in the solid state. However, Ph$\sb3$PS/Se.AlCl$\sb3$ are severely bent at the chalcogen centre. The contrasting modes of acid coordination are rationalised in terms of the different contributions of $\pi$- and o-components to the bonding schemes of the free bases. ftn*Please refer to dissertation for diagrams. | en_US |
| dc.description | Thesis (Ph.D.)--Dalhousie University (Canada), 1990. | en_US |
| dc.language | eng | en_US |
| dc.publisher | Dalhousie University | en_US |
| dc.publisher | | en_US |
| dc.subject | Chemistry, Organic. | en_US |
| dc.subject | Chemistry, Physical. | en_US |
| dc.title | I. Synthesis and characterisation of new main group heteronaphthalenic cations. II. An investigation of the triphenylphosphine chalcogenide-trichloroaluminium(III) adduct systems. | en_US |
| dc.type | text | en_US |
| dc.contributor.degree | Ph.D. | en_US |
