{"id":{"repo_id":"waikato-masters","oai_identifier":"oai:researchcommons.waikato.ac.nz:10289/17628"},"canonical_url":"https://search.dev.ndltd.org/etd/waikato-masters/oai:researchcommons.waikato.ac.nz:10289/17628","repository":{"repo_id":"waikato-masters","name":"University Waikato","base_url":"https://researchcommons.waikato.ac.nz/server/oai/request"},"display":{"title":"Vibrational studies of tetrahalogenocuprates (II)","abstract":"The compounds (R₄N)₂CuBrₙCℓ₄₋ₙ (R = CH₃, C₂H₅; n = 1 - 3) were studied by far infra-red spectroscopy. The results, in conjunction with the evidence of X-ray powder diffraction measurements we reported earlier, show that, within each series, the mixed bromochlorocuprates(II) are isomorphous with each other and with the corresponding compounds where n = 0, 4. There is also evidence of discrete CuBrₙCℓ₄₋ₙ²⁻ anions with flattened tetrahedral configurations. The assignment problems associated with the vibrational spectrum of caesium tetrachlorocuprate(II) were critically discussed. A unit cell analysis of the compound was performed with two primary objectives: (A) to interpret the vibrational spectrum; and (B) to develop a competent model force field for such study. The analysis produces a physically sensible set of force constants which supports one particular set of assignments. The potential force field developed in the unit cell analysis of Cs₂CuCℓ₄ was extended to the study of the vibrations of Cs₂ZnCℓ₄ crystal with encouraging results.","abstract_html":"The compounds (R₄N)₂CuBrₙCℓ₄₋ₙ (R = CH₃, C₂H₅; n = 1 - 3) were studied by far infra-red spectroscopy. The results, in conjunction with the evidence of X-ray powder diffraction measurements we reported earlier, show that, within each series, the mixed bromochlorocuprates(II) are isomorphous with each other and with the corresponding compounds where n = 0, 4. There is also evidence of discrete CuBrₙCℓ₄₋ₙ²⁻ anions with flattened tetrahedral configurations. The assignment problems associated with the vibrational spectrum of caesium tetrachlorocuprate(II) were critically discussed. A unit cell analysis of the compound was performed with two primary objectives: (A) to interpret the vibrational spectrum; and (B) to develop a competent model force field for such study. The analysis produces a physically sensible set of force constants which supports one particular set of assignments. The potential force field developed in the unit cell analysis of Cs₂CuCℓ₄ was extended to the study of the vibrations of Cs₂ZnCℓ₄ crystal with encouraging results.","abstract_has_math":false,"creators":["Yeoh, Teng Kwong"],"institution":"The University of Waikato","degree_name":null,"degree_level":null,"degree_discipline":null,"degree_department":null,"school":null,"contributors":[],"advisors":["Smith, D.W."],"committee_chairs":[],"committee_members":[],"year":1979,"date_issued":"1979","date_published":"1979","updated_at":"2026-07-24T05:57:27Z","subjects":[],"languages":[],"rights":["All items in Research Commons are provided for private study and research purposes and are protected by copyright with all rights reserved unless otherwise indicated."],"rights_urls":["https://researchcommons.waikato.ac.nz/bitstreams/ba562e66-5ae8-43d6-bc68-add698bf908b/download"],"identifier_entries":[]},"links":{"outbound_url":null,"outbound_label":null,"outbound_source":null},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor.advisor","label":"Advisor","values":["Smith, D.W."]},{"key":"dc:creator","label":"Author","values":["Yeoh, Teng Kwong"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date.issued","label":"Date","values":["1979"]},{"key":"dc:publisher.institution","label":"Dc Publisher Institution","values":["The University of Waikato"]},{"key":"dc:relation.isreferencedby","label":"Dc Relation Isreferencedby","values":["https://hdl.handle.net/10289/17628"]},{"key":"dc:type","label":"Dc Type","values":["Thesis"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:rights","label":"Dc Rights","values":["https://researchcommons.waikato.ac.nz/bitstreams/ba562e66-5ae8-43d6-bc68-add698bf908b/download","All items in Research Commons are provided for private study and research purposes and are protected by copyright with all rights reserved unless otherwise indicated."]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier.uri","label":"Identifier URI","values":["https://researchcommons.waikato.ac.nz/bitstreams/62d4a9dc-4e4c-443b-a517-f562cb6d5f22/download"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description.abstract","label":"Abstract","values":["The compounds (R₄N)₂CuBrₙCℓ₄₋ₙ (R = CH₃, C₂H₅; n = 1 - 3) were studied by far infra-red spectroscopy. The results, in conjunction with the evidence of X-ray powder diffraction measurements we reported earlier, show that, within each series, the mixed bromochlorocuprates(II) are isomorphous with each other and with the corresponding compounds where n = 0, 4. There is also evidence of discrete CuBrₙCℓ₄₋ₙ²⁻ anions with flattened tetrahedral configurations. The assignment problems associated with the vibrational spectrum of caesium tetrachlorocuprate(II) were critically discussed. A unit cell analysis of the compound was performed with two primary objectives: (A) to interpret the vibrational spectrum; and (B) to develop a competent model force field for such study. The analysis produces a physically sensible set of force constants which supports one particular set of assignments. The potential force field developed in the unit cell analysis of Cs₂CuCℓ₄ was extended to the study of the vibrations of Cs₂ZnCℓ₄ crystal with encouraging results."]},{"key":"dc:format.checksum.md5","label":"Dc Format Checksum Md5","values":["77c523d96ee7e20298f13be2fe901289","e14202ab27e47ddb00d33097327ba050","3334dece91a96c1437e87eb45474220e"]},{"key":"dc:title","label":"Title","values":["Vibrational studies of tetrahalogenocuprates (II)"]}]}],"canonical_facts":{"dc:contributor.advisor":["Smith, D.W."],"dc:creator":["Yeoh, Teng Kwong"],"dc:date.issued":["1979"],"dc:description.abstract":["The compounds (R₄N)₂CuBrₙCℓ₄₋ₙ (R = CH₃, C₂H₅; n = 1 - 3) were studied by far infra-red spectroscopy. The results, in conjunction with the evidence of X-ray powder diffraction measurements we reported earlier, show that, within each series, the mixed bromochlorocuprates(II) are isomorphous with each other and with the corresponding compounds where n = 0, 4. There is also evidence of discrete CuBrₙCℓ₄₋ₙ²⁻ anions with flattened tetrahedral configurations. The assignment problems associated with the vibrational spectrum of caesium tetrachlorocuprate(II) were critically discussed. A unit cell analysis of the compound was performed with two primary objectives: (A) to interpret the vibrational spectrum; and (B) to develop a competent model force field for such study. The analysis produces a physically sensible set of force constants which supports one particular set of assignments. The potential force field developed in the unit cell analysis of Cs₂CuCℓ₄ was extended to the study of the vibrations of Cs₂ZnCℓ₄ crystal with encouraging results."],"dc:format.checksum.md5":["77c523d96ee7e20298f13be2fe901289","e14202ab27e47ddb00d33097327ba050","3334dece91a96c1437e87eb45474220e"],"dc:identifier.uri":["https://researchcommons.waikato.ac.nz/bitstreams/62d4a9dc-4e4c-443b-a517-f562cb6d5f22/download"],"dc:publisher.institution":["The University of Waikato"],"dc:relation.isreferencedby":["https://hdl.handle.net/10289/17628"],"dc:rights":["https://researchcommons.waikato.ac.nz/bitstreams/ba562e66-5ae8-43d6-bc68-add698bf908b/download","All items in Research Commons are provided for private study and research purposes and are protected by copyright with all rights reserved unless otherwise indicated."],"dc:title":["Vibrational studies of tetrahalogenocuprates (II)"],"dc:type":["Thesis"]},"updated_at":"2026-07-24T05:57:27Z"}