Use this URL to cite or link to this record in EThOS: https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.457739
Title: Conformation and reactivity in the bicyclo [3.3.2] decane system
Author: Hafter, Russell
ISNI:       0000 0001 3523 8279
Awarding Body: University of Stirling
Current Institution: University of Stirling
Date of Award: 2000
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Abstract:
The synthesis of a series of substituted bicyclo (3.3.2) decane derivatives is described. Infra-red spectroscopy shows the presence of bands that can only be ascribed to a 3,7-interaction in a twin-chair conformation for many derivatives, but there is evidence for a conformational equilibrium between twin-chair and boat-chair conformations. In cases where the atoms of the two carbon bridge are constrained by a double bond, or an equivalent grouping, so that they are coplanar with the bridgehead atoms, the preferred conformation is the boat-chair; this has been confirmed by the X-ray structure of 7,8,9,10-tetrahydro-6,10-propano-6H-cyclohepta(b)quinoxaline. Solvolytic studies on exo-2,3-epoxybicyclo(3.3.2)decane are reported. Hydride shifts are found to be more facile than in the bicyclo(3.3.1)nonane system, and a revised mechanistic scheme for the acid catalysed solvolysis of epoxides is described. Buffered acetolysis of exo-2-bicyclo(3.3.?)decyl tosylate shows two interesting phenomena. Firstly, there appears to be a significant 1,2-hydride shift to the bridgehead position, and secondly, it is probable that a 2,6- hydride shift is taking place in a twin-twist-boat conformation. 9-Bicyclc(3.3.2)decanone has been found to be a surprisingly unreactive ketone; this lack of reactivity is rationalised in terms of I-strain theory. Preliminary studies into the autoxidation of bicyclo(3.3.2)decane and the synthesis of bicyclo(3.3.2)deca-2,6-diene are reported, the latter in connection with a study into the Single Inversion Cope Reaction.
Supervisor: Not available Sponsor: Not available
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID: uk.bl.ethos.457739  DOI: Not available
Keywords: Chemistry, Organic ; Spectroscopy ; Mass Spectroscopy
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