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NMR studies of hydrogen bonding

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dc.contributor.advisor Schutte CJH, Prof en
dc.contributor.advisor Wessels PL, Dr en
dc.contributor.author Erotocritou D en
dc.date.accessioned 2016-09-22T11:54:16Z
dc.date.available 2016-09-22T11:54:16Z
dc.date.submitted 1988 en
dc.identifier.uri http://hdl.handle.net/20.500.11892/141674
dc.description.abstract In this thesis the influence of the intramolecular hydrogen bond strength of the four compounds: O-hydroxyacetophenone, salicylic acid, salicylaldehyde and methyl salicylate, was studied with respect to their NMR properties. From the H chemical shifts of the hydroxyl protons, it was determined experimentally and verified by existing literature<sup>1,2</sup> exhibit the following order of decreasing hydrogen bond strength: O-hydroxyacetophenone, salicylic acid, salicyl= aldehyde, methyl salicylate.<br><br> In this study a correlation was investigated between hydrogen bond strength and: a) (<sup>13</sup>C,<sup>1</sup>H) coupling constants and b)<sup>13</sup>C, deuterium induced,isotope shifts. The (<sup>13</sup>C, OH) couplings showed no such correlation. The <sup>13</sup>C isotope shifts revealed a direct relation with the hydrogen bond strength.<br><br> This study also revealed that stereospecificity plays an important role in the isotope shift values similar to that experienced for the (<sup>1</sup> H,<sup>1</sup> H) and (<sup>13</sup> C, <sup>1</sup> H) coupling constants. en
dc.language English en
dc.subject Chemistry en
dc.title NMR studies of hydrogen bonding en
dc.type Masters degree en
dc.description.degree MSc en

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