2026-09-27T01:02:44Zhttps://researchcommons.waikato.ac.nz/server/oai/request

oai:researchcommons.waikato.ac.nz:10289/176282025-11-11T14:02:59Zcom_10289_2222col_10289_2223

Vibrational studies of tetrahalogenocuprates (II) Yeoh, Teng Kwong Smith, D.W. 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. The University of Waikato 1979 Thesis en https://hdl.handle.net/10289/17628 https://researchcommons.waikato.ac.nz/bitstreams/62d4a9dc-4e4c-443b-a517-f562cb6d5f22/download 77c523d96ee7e20298f13be2fe901289 https://researchcommons.waikato.ac.nz/bitstreams/ba562e66-5ae8-43d6-bc68-add698bf908b/download e14202ab27e47ddb00d33097327ba050 https://researchcommons.waikato.ac.nz/bitstreams/3eaff9d9-4c86-4ad3-a53b-56b9b36e9667/download 3334dece91a96c1437e87eb45474220e 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.