Effect of Solution Concentration on The Fermi Resonance(FR) of Carbon Tetrachloride

The νasym.NCS frequencies for alkyl isothiocyanates occur at higher frequency in CHCl3 or CDCl3 solution than in CCl4 solution. The νasym.NCS mode increases in frequency as the mole % CHCl3/CCl4 increases. The νasym.NCS mode for butyl isothiocyanate occurs at an exceptionally high frequency, and this result is explained in terms of the formation of a pseudo-six-membered intramolecularly hydrogen-bonded ring. The νasym.NCS modes for the alkyl isothiocyanates are corrected for Fermi resonance (FR), with the exception of the propyl analog. The propyl analog appears to have three other modes in FR with νasym.NCS, and an equation has not yet been developed to correct for FR in this case. The unperturbed νasym.NCS frequencies for alkyl isothiocyanates decrease in the alkyl order: methyl, butyl, ethyl, and tert-butyl. The decrease in frequency of νasym.NCS in the order methyl, ethyl, and tert-butyl isothiocyanate is attributed to weakening of the N=C=S bonds due to σ electron donation of each alkyl group. In the case of the butyl analog, the σ electron donation is partially compensated for by the postulated existence of a pseudo-six-membered hydrogen-bonded ring.

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Infrared Study of Benzaldehyde and 4-Substituted Benzaldehydes in Carbon Tetrachloride and/or Chloroform Solutions: Aldehydic CH Group

Applied Spectroscopy ◽

10.1366/0003702924125582 ◽

1992 ◽

Vol 46 (2) ◽

pp. 293-305 ◽

Cited By ~ 14

Author(s):

Richard A. Nyquist ◽

Sam E. Settineri ◽

Davin A. Luoma

Keyword(s):

Carbon Tetrachloride ◽

The Other ◽

Fermi Resonance ◽

Infrared Study ◽

Resonance Doublet ◽

Substituted Benzaldehydes ◽

Linear Manner

The vCH and 2 δCH Fermi resonance doublet and unperturbed vCH and unperturbed 2 δCH for 4- x-benzaldehydes increase in frequency as the mole % CHCl3/CCl4 increases. One portion of the vCH and 2 δCH Fermi doublet occurs in the region 2726–2746 cm−1 and the other portion of the Fermi doublet occurs in the region 2805–2845 cm−1. The unperturbed vCH for 4- x-benzaldehydes is assigned in the region 2760–2810 cm−1. Submaxima are also noted for 4- x-benzaldehydes in the region 2726–2810 cm−1 and these bands are assigned to combination tones. The vasym. NO2 mode occurs in the region 1533.60–1538.73 cm−1 and the vsym. NO2 mode occurs in the region 1344.07–1345.63 cm−1 for 4-nitrobenzalde-hyde in CHCl3/CCl4 solutions. The vsym. NO2 mode shifts to lower frequency by ∼4.8 cm−1, while the vsym. NO2 mode shifts to higher frequency by ∼1.6 cm−1 in going from CCl4 solution to CHCl3 solution. The vCN mode for 4-cyanobenzaldehyde increases in frequency in a nonlinear manner as the mole % CHCl3/CCl4 increases. The vOH mode for 4-hydroxybenzaldehyde decreases in frequency in essentially a linear manner as the mole % CHCl3/CCl4 increases. The δCH mode for 4- x-benzaldehydes increases in frequency as the mole % CHCl3/CCl4 increases; however, neither unperturbed vCH nor δCH correlates with Hammett σp values.

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On the Fermi Resonance and Isotope Effect in the Infrared Spectrum of Carbon Tetrachloride

The Journal of Chemical Physics ◽

10.1063/1.1740670 ◽

1955 ◽

Vol 23 (11) ◽

pp. 2083-2084 ◽

Cited By ~ 4

Author(s):

P. Tuomikoski

Keyword(s):

Carbon Tetrachloride ◽

Infrared Spectrum ◽

Isotope Effect ◽

Fermi Resonance

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Effect of solution concentration on the Raman scattering cross-section of carbon tetrachloride

Journal of Raman Spectroscopy ◽

10.1002/jrs.1248 ◽

2004 ◽

Vol 35 (12) ◽

pp. 1042-1046 ◽

Cited By ~ 9

Author(s):

Jian-Hua Yin ◽

Shu-Qin Gao ◽

Zuo-Wei Li ◽

Ying-Ning Yu ◽

Guo-Hui Lu ◽

...

Keyword(s):

Carbon Tetrachloride ◽

Raman Scattering ◽

Cross Section ◽

Solution Concentration ◽

Scattering Cross Section ◽

Scattering Cross ◽

Raman Scattering Cross Section

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The infrared and Raman spectra of phenyl acetate, phenyl-d5 acetate, and phenyl acetate-d3

Australian Journal of Chemistry ◽

10.1071/ch9690691 ◽

1969 ◽

Vol 22 (4) ◽

pp. 691 ◽

Cited By ~ 2

Author(s):

H Lee ◽

JK Wilmshurst

Keyword(s):

Carbon Tetrachloride ◽

Raman Spectra ◽

Infrared Spectra ◽

Carbon Disulphide ◽

Fermi Resonance ◽

Phenyl Acetate ◽

Rotational Isomer ◽

Infrared And Raman Spectra

The infrared spectra of phenyl acetate, phenyl-d5 acetate, and phenyl acetate-d3 as solutions in carbon tetrachloride or carbon disulphide have been recorded in the 4000-100 cm-1 region together with the Raman spectra of the pure liquids. The data are consistent with the assumption of a single rotational isomer and support the previous1 interpretation of the complex carbonyl region observed in the phenolic acetates as arising from a single fundamental in Fermi resonance with one or more combination tones.

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The Precipitation of Si in AlCuSi Thin Films

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100070618 ◽

1973 ◽

Vol 31 ◽

pp. 34-35 ◽

Cited By ~ 1

Author(s):

R. M. Anderson

Keyword(s):

Electron Microscopy ◽

Thin Films ◽

Heat Treatment ◽

Solid Solution ◽

Integrated Circuit ◽

Copper Film ◽

Solution Concentration ◽

X Ray ◽

Silicon Thin Films ◽

Before And After

Aluminum-copper-silicon thin films have been considered as an interconnection metallurgy for integrated circuit applications. Various schemes have been proposed to incorporate small percent-ages of silicon into films that typically contain two to five percent copper. We undertook a study of the total effect of silicon on the aluminum copper film as revealed by transmission electron microscopy, scanning electron microscopy, x-ray diffraction and ion microprobe techniques as a function of the various deposition methods.X-ray investigations noted a change in solid solution concentration as a function of Si content before and after heat-treatment. The amount of solid solution in the Al increased with heat-treatment for films with ≥2% silicon and decreased for films <2% silicon.

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