✍ Scribed by Matthew S. Johnson; Keith T. Kuwata; Chi-Kin Wong; Mitchio Okumura
No coin nor oath required. For personal study only.
The infrared spectrum of the ionic cluster I-(H 2 O) was recorded from 3170 to 3800 cm-1 by vibrational predissociation spectroscopy. A strong multiplet observed at 3415 cm -l and a narrow band at 3710 cm -1 were assigned as a hydrogen-bonded OH stretch and free OH stretch respectively, indicating that H20 forms a single hydrogen bond with the iodide anion. Ab initio vibrational frequencies and intensities were computed at the second-order Moller-Plesset (MP2) level for the minimum energy configuration, a nearly linear hydrogen-bonded isomer, and for a low-lying saddlepoint, a symmetric C2v bridged isomer. The spectrum predicted for the hydrogen-bonded isomer agreed well with experiment.
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## Abstract The powder Fourier‐transform (FT) infrared and Raman spectra of ScAsO~4~· H~2~O were recorded and are discussed with a factor‐group analysis based on of its known structural characteristics. Copyright © 2006 John Wiley & Sons, Ltd.