dc.contributor.advisor | Koehler, W. H. | |
dc.contributor.author | Sharp, Keith Wayne | en_US |
dc.date.accessioned | 2019-10-11T15:10:01Z | |
dc.date.available | 2019-10-11T15:10:01Z | |
dc.date.created | 1976 | en_US |
dc.date.issued | 1976 | en_US |
dc.identifier | aleph-255131 | en_US |
dc.identifier.uri | https://repository.tcu.edu/handle/116099117/31758 | |
dc.description.abstract | Solutions of sodium polyselenides in liquid ammonia have been studied using UV-Visible spectroscopy. The results of the investigation indicate that Na2Se3, Na2Se4, Na2Se6 are isolatable, spectroscopically identifiable species. Na2Se5 was found to be a 1: 1 mixture of Na2Se4 and Na2Se6 And no evidence was found to indicate a higher polyselenide than Na2Se6. Na2Se2 could be prepared only in equilibrium with Na2Se3 and Na2Se and was not isolated in a pure state from solution. The value of the constant (K'=K_eq/K_sp) for the equilibrium 2Na2Se2 <--> Na2Se3 + Na2Se was found to be ca 5 x 10^6 M^-3. The spectra of Na2Se and H2Se in liquid ammonia were quite similar. Both spectra have a single band ca 2900Å which, in each case, shows an energy versus temperature dependence. The slope for Na2Se is -40 cal/deg and -45 cal/deg for H2Se. The spectrum of each polyselenide consisted of several overlapping bands. All spectra were submitted to curve resolution and the results are as follows: Na2Se3 (2780Å, 3170Å. 3860Å, and 5925Å), Na2Se4 (2560Å, 3040Å, 3440Å, 4160Å, 5515Å), Na2Se6 (2660Å, 3060Å, 3820Å, 4360Å, 5810Å), and Na2Se2 (, based on difference spectra, ca 2300Å, 3200Å, 4750Å, 5600Å). | |
dc.format.extent | ix, 218 leaves, bounds : illustrations, charts | en_US |
dc.format.medium | Format: Print | en_US |
dc.language.iso | eng | en_US |
dc.relation.ispartof | Texas Christian University dissertation | en_US |
dc.relation.ispartof | AS38.S532 | en_US |
dc.subject.lcsh | Organic compounds--Synthesis | en_US |
dc.title | Synthesis and characterization of sodium polyselenides in liquid ammonia solution | en_US |
dc.type | Text | en_US |
etd.degree.department | Department of Chemistry | |
etd.degree.level | Doctoral | |
local.college | College of Science and Engineering | |
local.department | Chemistry and Biochemistry | |
local.academicunit | Department of Chemistry | |
dc.type.genre | Dissertation | |
local.subjectarea | Chemistry and Biochemistry | |
dc.identifier.callnumber | Main Stacks: AS38 .S532 (Regular Loan) | |
dc.identifier.callnumber | Special Collections: AS38 .S532 (Non-Circulating) | |
etd.degree.name | Doctor of Philosophy | |
etd.degree.grantor | Texas Christian University | |