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High-Resolution Infrared Spectrum of the Ring-Puckering Band, Ņ10 of Diborane



Walter J. Lafferty, J.- M. Flaud, R L. Sams, Thomas A. Blake, S W. Sharpe


The spectrum of the Ņ10 band of diborane, arising from the ring puckering vibration, has been obtained with a spectral resolution of 0.0015 cm-1 in the region 275 to 400 cm-1. The spectrum of a sample enriched in 10B was recorded as well as one with naturally abundant boron, i.e., 64% 11B2H6, 32% 10B11BH6 and 4% 10B2H6. This mode is the lowest vibrational level of the molecule and is unperturbed; therefore, a very complete assignment of not only the fundamental bands but also the 2Ņ10 - Ņ10 hot bands of all three boron isotopomers has been possible. The intensities of several hundred lines of the fundamental and hot bands of all isotopomers have been measured and vibrational transition moments have been obtained for all the bands studied. Finally it has been shown that for the Ņ10 ring puckering vibration the harmonic approximation does not apply.
Journal of Molecular Spectroscopy
No. 2


diborane, high resolution, infrared spectrum, molecular constants, transition moments


Lafferty, W. , M., J. , Sams, R. , Blake, T. and Sharpe, S. (2000), High-Resolution Infrared Spectrum of the Ring-Puckering Band, &#325;<sub>10</sub> of Diborane, Journal of Molecular Spectroscopy (Accessed April 15, 2024)
Created June 1, 2000, Updated February 17, 2017