The Vibration-Rotation Spectrum of Ge<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">H</mml:mi></mml:mrow><mml:mrow><mml:mn>4</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:math>

Straley, Joseph W.; Tindal, Charles H.; Nielsen, Harald H.

doi:10.1103/physrev.62.161

Cited by 52 publications

(4 citation statements)

References 3 publications

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“…Our calculated GeH 4 frequencies are in good agreement (about 1%) with the experimental fundamental frequencies of Straley et al [54]. Zero point energy (ZPE) corrections are reported with and without anharmonic corrections.…”

Section: Geometries and Frequenciessupporting

confidence: 89%

Heats of formation of GeH4, GeF4 and Ge(CH3)4

2006

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Section: Geometries and Frequenciessupporting

confidence: 89%

Heats of formation of GeH4, GeF4 and Ge(CH3)4

2006

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“…This peak matches the Q-branch of the 3 fundamental vibration ͑degenerate Ge-H stretch, 2114 cm Ϫ1 ͒ of the GeH 4 molecule, as concluded from comparison to the vibration-rotation absorption spectrum. 47 The frequencies of the GeH 3 radical lie in a different range ͓ 1 ϭ1839, 2 ϭ928, 3 ϭ1813, 4 ϭ850 ͑Ref. 48͔͒ We suggest that the observed emission is a result of the nearly resonant VϪV energy exchange process,…”

Section: Rate Constant For the Oh؉geh 4 Reactionmentioning

confidence: 85%

Dynamics of OH and OD radical reactions with HI and GeH4 as studied by infrared chemiluminescence of the H2O and HDO products

Butkovskaya

Setser

1997

The Journal of Chemical Physics

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Articles you may be interested inAccurate combined-hyperbolic-inverse-power-representation of ab initio potential energy surface for the hydroperoxyl radical and dynamics study of O + OH reaction A laser photolysis/time-resolved Fourier transform infrared emission study of OH (X 2 Π,v) produced in the reaction of alkyl radicals with O ( 3 P)The infrared chemiluminescence of vibrationally excited H 2 O and HDO from the highly exothermic reactions of OH and OD radicals with HI and GeH 4 was observed in the 2200-5500 cm Ϫ1 range. The experiments utilized a fast-flow reactor with 0.3-1 Torr of Ar carrier gas at 300 K; the OH͑OD͒ radicals were produced via the H͑D͒ϩNO 2 reaction and the H or D atoms were generated by a discharge in a H 2 ͑D 2 ͒/Ar mixture. The H 2 O and HOD vibrational distributions were determined by computer simulation of the emission spectra in the 2200-3900 cm Ϫ1 range. The total vibrational energy released to H 2 O and HOD molecules is, respectively, ͗ f v ͘ ϭ 0.36 and 0.41 from HI and ͗ f v ͘ ϭ 0.46 and 0.51 from GeH 4 . These values are significantly smaller than for the reactions of OH and OD with HBr, ͗ f v ͘ ϭ 0.61 and 0.65. The populations of the O-H stretching vibration of HOD and the collisionally coupled 1 and 3 stretching modes of H 2 O decrease with increasing vibrational energy. In contrast, the vibrational distribution from the HBr reaction is inverted. The bending mode distributions in all stretching states of H 2 O and HOD extend to the thermodynamic limit of each reaction. A surprisal analysis was made for H 2 O͑HOD͒ distributions from the title reactions and compared with that for OH͑OD͒ϩHBr. The surprisal analysis tends to confirm that the dynamics for the HI and GeH 4 reactions differ from the HBr reaction. The HI reaction may proceed mainly via addition-migration, while the GeH 4 reaction may involve both direct abstraction and addition-migration. A rate constant for the OHϩGeH 4 →H 2 OϩGeH 3 reaction was evaluated by comparing the H 2 O emission intensities with that of the OHϩHBr→H 2 OϩBr reaction, k GeH 4 /k HBr ϭ 6.5 Ϯ 0.9. Secondary kinetic-isotope effects, k OH /k OD ϭ 1.4 Ϯ 0.1, 1.0Ϯ0.2, and 1.3Ϯ0.2, were determined for reactions of OH and OD with GeH 4 , HI, and HBr, respectively, by comparing the relative H 2 O and HOD emission intensities.

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“…They all display well separated frequencies near 3050, 2600-2450, and 1230 cm-1 characteristic of the r(CH), r(BH), and 5(CH) motions, for o-carborane moieties,7 respectively, but absorptions were noticeably absent from the region characteristic of -(M = Ge, Sn, Pb) stretching motions (2100-1700 cm-1). 8 The spectra are displayed in Figure 2 and the frequencies tabulated in Table I along with tentative assignments.…”

Section: Resultsmentioning

confidence: 99%

Preparation and characterization of 1-germa-, 1-stanna-, and 1-plumba-2,3-dicarba-closo-dodecaborane(11)

Rudolph¹,

Voorhees²,

Cochoy³

1970

J. Am. Chem. Soc.

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Tetraphenyldiphosphine, from the initial preparation, was added to 25 ml of toluene containing sufficient sulfur for complete reaction.The mixture was heated to with stirring, under an inert atmosphere for 6 hr. The hot toluene solution was then filtered and evaporated. This reaction resulted in essentially 100% conversion based on the initial quantity of tetraphenyldiphosphine.The white crystals obtained from this reaction were recrystallized from chloroform-methanol and vacuum dried. The infrared spec-trum83 was identical with that reported for tetraphenyldiphosphine disulfide. The mass spectrum was consistent, exhibiting a peak at 434, attributable to the parent ion [(C6H5)2P(S)P(S)(C6H5)2, mol wt 434], Diphenylphosphinic Anhydride, (CGH5)2P(0)0P(0)(CeH:)2. Tetraphenyldiphosphine, 0.22 g (0.6 mmol) from the initial preparation, was added to 15 ml of toluene containing a small amount of diphenylchlorophosphine (0.05 g). Dry oxygen in excess was introduced into the solution at room temperature, and the reaction continued until oxygen take-up ceased. The toluene solution was then filtered through decolorizing charcoal, concentrated by evaporation under vacuum, and allowed to stand at room temperature.The crystals which formed on standing were washed repeatedly with dry, cold heptane or ether and dried under vacuum at room temperature. The material was then recrystallized several times from toluene. In this preparation as in those above, the presence of moisture led to the formation of diphenylphosphinic acid, which was removed by washing with 1 % aqueous potassium hydroxide as described previously.Diphenylphosphinic anhydride melted at 144-145°, lit.10 142-143°. Its infrared spectrum contained a band at 1236 cm-1 assigned to the P=Ozl stretching frequency and a band at 960 cm-1 assigned to the P-O-P22 linkage.Mass spectral data showed a parent ion peak corresponding to a mass of 418 [(C6H6)2P(0)0P(0)(CeH6)2; mol wt 418], and a fragmentation pattern consistent with that of diphenylphosphinic anhydride.

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The Vibration-Rotation Spectrum of GeH4

Cited by 52 publications

References 3 publications

Heats of formation of GeH4, GeF4 and Ge(CH3)4

Heats of formation of GeH4, GeF4 and Ge(CH3)4

Dynamics of OH and OD radical reactions with HI and GeH4 as studied by infrared chemiluminescence of the H2O and HDO products

Preparation and characterization of 1-germa-, 1-stanna-, and 1-plumba-2,3-dicarba-closo-dodecaborane(11)

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