Show simple item record

dc.contributor.authorSomerville, William Campbellen
dc.date.accessioned2018-01-31T11:37:59Z
dc.date.available2018-01-31T11:37:59Z
dc.date.issued1930
dc.identifier.urihttp://hdl.handle.net/1842/27442
dc.description.abstracten
dc.description.abstract1. On repeating the work of Pickering on the freezing point curves of the amines, the hydrate of trimethylamine is found to be Me₃N,10H₂O and not Me₃N,11H₂o. The existence of another hydrate of diethylamine, possibly Et₂NH,3H₂0, is indicated. 2. A method of deducing the degree of hydration of a solute directly from the conductivities of its solutions is suggested. While in some cases the values agree with those from freezing point data, in others discrepancies are found. The effect is thus liable to be masked by other factors, especially at 25°. 3. The degrees of hydration calculated from the curves obtained where ice is the crystallising substance agree as well as could be expected with the criterion that in dilute solution at 0°C each amine is hydrated to approximately the same extent as in the first hydrate shown by it in the freezing point diagram, except in the case of triethylamine. It appears that the order of hydration in the series, of methylamines and ethylamines is: mono < di < tri when the results from the determinations using the Beckmann thermometer are considered. 4. When the Beckmann results are corrected for hydration to the extent indicated, the positive deviation of the curve given by each amine from the ideal curve increases as the internal pressure of the amine decreases. From this consideration, the degree of hydration of triethylamine in dilute solution at 0°C is deduced as at least 12. The order of hydration of the amines is not the same as the order of basic strength, but appears to correspond exactly with the order of internal pressure. The greater the difference between the internal pressure of an amine and water, the greater is the degree of hydration. The results of Moore and Winmill from the partition coefficient seem to be disproved.en
dc.publisherThe University of Edinburghen
dc.relation.ispartofAnnexe Thesis Digitisation Project 2017 Block 16en
dc.relation.isreferencedbyAlready catalogueden
dc.titleAn investigation of some physical properties of aqueous solutions of the alkyl aminesen
dc.typeThesis or Dissertationen
dc.type.qualificationlevelDoctoralen
dc.type.qualificationnamePhD Doctor of Philosophyen


Files in this item

This item appears in the following Collection(s)

Show simple item record