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

Published

June 1, 2000

Author(s)

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

Abstract

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.

Citation

Journal of Molecular Spectroscopy

Volume

201

Issue

No. 2

Pub Type

Journals

Keywords

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

Citation

Lafferty, W. , M., J. , Sams, R. , Blake, T. and Sharpe, S. (2000), High-Resolution Infrared Spectrum of the Ring-Puckering Band, Ņ₁₀ of Diborane, Journal of Molecular Spectroscopy (Accessed December 14, 2024)