Analysis of the v 3 and v 1 infra-red bands of SiH4

Cabana, A.; Gray, David; Robiette, A. G.; Pierre, G.

doi:10.1080/00268977800102531

Cited by 76 publications

(21 citation statements)

References 25 publications

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“…These values are all within 0.20 cm -1 of that of the free silane molecule, which is given as 2189.1865 em -1. 16 Both this and the size of the vibrational perturbation are small, indicating that the triply degenerate vibration is only affected slightly on complexation. The structure of the complex, or more correctly the minimum of the intermolecular potential, would appear to be that which places the argon atom above one of the faces of the silane molecule, as this intuitively seems to be the most stable configuration.…”

Section: Discussionmentioning

confidence: 96%

“…16 If there was very little anisotropy, then the silane molecule would be almost free to rotate within the complex, and the band centers would then correspond closely with their respective silane monomer transitions. At the other extreme when the internal rotation is effectively quenched, the spectrum would be that of a prolate symmetric top, with an A rotational constant approximately equal to the rotational constant of the silane molecule.…”

Section: Simulation and Assignment Of The Spectrum Of Argon-silanementioning

confidence: 97%

“…15 for the ground vibrational state and from Ref. 16 for the excited vibrational state with v 3 = 1.…”

Section: Simulation and Assignment Of The Spectrum Of Argon-silanementioning

confidence: 99%

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Spectroscopy and dynamics of rare gas–spherical top complexes. The infrared spectrum of the ν3 band of argon–silane

Randall

Ibbotson

Howard

1994

The Journal of Chemical Physics

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The infrared spectrum of Ar–SiH4, a rare gas–spherical top van der Waals complex, has been recorded in the vicinity of the silane ν3 triply degenerate stretching vibration ∼2189 cm−1. A complex, dense spectrum is observed, and this is due to the observation of 12 bands with origins corresponding to transitions between different internal rotor states of the silane molecule within the complex. From the analysis of the rotational structure within each band, the average argon–silane separation is determined to be 4.043 Å in the ground vibrational state and 4.046 Å in the excited vibrational state with v3=1. Using a model developed previously and a very simple form for the intermolecular potential, these 12 bands have been assigned and an effective anisotropic intermolecular potential for the internal rotation of the silane molecule within the complex has been determined. The vibrational anisotropy responsible for lifting the threefold degeneracy of the ν3 vibration is found to be fairly small, of the order of 1 cm−1, while the rotational anisotropy is much larger, of the order of 90 cm−1.

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Section: Discussionmentioning

confidence: 96%

Section: Simulation and Assignment Of The Spectrum Of Argon-silanementioning

confidence: 97%

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Spectroscopy and dynamics of rare gas–spherical top complexes. The infrared spectrum of the ν3 band of argon–silane

Randall

Ibbotson

Howard

1994

The Journal of Chemical Physics

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“…It was introduced for the first term ,~1.3 time in [11,12]. Experimental data treatment for v 3 [13] and vl [14] bands permits to reproduce 500 v 3 transitions and 97 v I transitions with the highest rotational quantum number J = 15. It should be noted that the accuracy of v~ treatment is about 0.002cm -1, whereas that for v3 is only 0.007cm -1.…”

Section: Rotational Structure Analysis For the Dyad Of Vibrational Qumentioning

confidence: 99%

Qualitative analysis of vibration-rotation hamiltonians for spherical top molecules

Sadovskiı́

Zhilinskii

1988

Molecular Physics

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A new approach to the qualitative analysis of the rotational structure of a group of degenerate or quasidegenerate vibrational states is proposed. The approach is based on a quantum description of resonant vibrational states and on using classical methods when describing the rotational structure of these states. The approach is used for studying the rotational structure of two-and three-fold degenerate vibrational states of the tetrahedral AB 4 molecule as well as for studying the v 1, v 3 diad of 285iH4. The general scheme of the analysis is realized by computer.

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“…Many studies have been devoted to the spherical-top molecule SiH 4 [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20]. The ground state has been first investigated in [1][2][3] from infrared spectra using a medium resolution.…”

Section: Introductionmentioning

confidence: 99%