Moazzen-Ahmadi, NasserGakwaya, Simon2005-08-162005-08-1620040494037563http://hdl.handle.net/1880/41523Bibliography: p. 65-69We report the complete characterization of the hot band (v3+2v₅ )-2v₅ for linear C₄ and the analogous band (v3+2v7 )-2v7 for linear C₅ via gas phase, rotationally resolved spectra. C₄ and C₅ were generated using a flowing mixture of acetylene and helium subjected to a hollow cathode discharge. The spectra were recorded using a diode laser spectrometer. Σ - Σ and Δ - Δ transitions were observed for both molecular species. Analyses of these hot bands yielded the following lower state molecular parameters: v0=1547.3164(5)cm^(-1), B=502492(18)MHz, D=0.924(52)kHz, xL=0.5802(92)cm^(-1) and q5=10.8890(26) MHz for C₄ and v0=2166.2331(3) cm^(-1), B=2576.524(87)MHz,D=0.143(13) kHz, xL=0.409(10) cm^(-1) and q7=3.9845(15) for C₅ . The results were completely consistent with linear structures and support previous conclusions with regard to the semi-rigid linear nature of these two molecular species. This work represents the first conclusive study of a vibrational state with two quanta in the bend for any carbon cluster with four or more atoms.viii, 80 leaves : ill. ; 30 cm.engUniversity of Calgary graduate students retain copyright ownership and moral rights for their thesis. You may use this material in any way that is permitted by the Copyright Act or through licensing that has been assigned to the document. For uses that are not allowable under copyright legislation or licensing, you are required to seek permission.master thesis10.11575/PRISM/17794AC1 .T484 2004 G35