scholarly journals THE VIBRATIONAL SPECTRA OF ISOBUTANE AND ISOBUTANE-d1

1956 ◽  
Vol 34 (8) ◽  
pp. 1037-1045 ◽  
Author(s):  
J. C. Evans ◽  
H. J. Bernstein
Keyword(s):  
Raman Spectra ◽  
Infrared Spectra ◽  
Vibrational Spectra ◽  
Vibrational Assignment ◽  
Depolarization Ratios

The Raman spectra of liquid (CH3)3CH and (CH3)3CD were obtained photo-electrically and intensities and depolarization ratios measured. The infrared spectra of the corresponding gases were obtained from 3 to 35 μ. A vibrational assignment consistent with depolarization ratios and band contours has been made for the molecules on the basis of C3ν symmetry and their spectra correlated.

THE VIBRATIONAL SPECTRA OF ACETALDEHYDE AND ACETALDEHYDE-d1

1956 ◽  
Vol 34 (8) ◽  
pp. 1083-1092 ◽  
Author(s):  
J. C. Evans ◽  
H. J. Bernstein
Keyword(s):  
Raman Spectra ◽  
Infrared Spectra ◽  
Vibrational Spectra ◽  
Vibrational Assignment ◽  
Depolarization Ratios

The Raman spectra of liquid CH3CHO and CH3CDO were obtained photo-electrically and depolarization ratios measured. Infrared spectra of the vapors and solids were also obtained. A vibrational assignment is given and the spectra correlated. The vibrational spectra of the acetyl halides reported in the literature are also correlated.

THE VIBRATIONAL SPECTRA OF PYRIDINE, PYRIDINE-4-d, PYRIDINE-2,6-d2, AND PYRIDINE-3,5-d2

1957 ◽  
Vol 35 (10) ◽  
pp. 1183-1194 ◽  
Author(s):  
J. K. Wilmshurst ◽  
H. J. Bernstein
Keyword(s):  
Raman Spectra ◽  
Infrared Spectra ◽  
Thermodynamic Functions ◽  
Vibrational Spectra ◽  
Vibrational Assignment ◽  
Vapor State ◽  
Depolarization Ratios

The infrared spectra of pyridine and pyridine-4-d in the vapor state and of pyridine-2,6-d2 and pyridine-3,5-d2 in the liquid and vapor states have been obtained. The Raman spectra of pyridine-4-d, pyridine-2,6-d2, and pyridine-3,5-d2 as liquids have also been obtained together with depolarization ratios. The vapor band contours for pyridine support the assignment of Corrsin, Fax, and Lord in most part in preference to the assignment of McCullough and co-workers but it was found necessary to reassign the b2 frequencies to give agreement between calculated and observed thermodynamic functions. The infrared and Raman data on pyridine-4-d are in agreement with the reported assignment for the a1, a2, and b1 modes but it was found necessary to reassign the b2 frequencies consistent with the present assignment in pyridine. A complete vibrational assignment for pyridine-2,6-d2 and pyridine-3,5-d2 has been made consistent with the present assignment in pyridine.

THE VIBRATIONAL SPECTRA OF THE FORMATE, ACETATE, AND OXALATE IONS

1956 ◽  
Vol 34 (2) ◽  
pp. 170-178 ◽  
Author(s):  
K. Ito ◽  
H. J. Bernstein
Keyword(s):  
Aqueous Solution ◽  
Raman Spectra ◽  
Infrared Spectra ◽  
Vibrational Spectra ◽  
Vibrational Assignments ◽  
Oxalate Ions ◽  
Oxalate Ion ◽  
Depolarization Ratios

The infrared spectra of the formate, acetate, and oxalate ions have been obtained for both the solid and aqueous solution. The Raman spectra of these ions with depolarization ratios have been obtained in aqueous solution. Vibrational assignments have been made which differ slightly for the acetate ion and more markedly for the oxalate ion from earlier work. The depolarization ratios confirm Fonteyne’s assignment for the formate ion.

THE INFRARED AND RAMAN SPECTRA OF HC(CD3)3 AND DC (CD3)3

1957 ◽  
Vol 35 (9) ◽  
pp. 969-979 ◽  
Author(s):  
J. K. Wilmshurst ◽  
H. J. Bernstein
Keyword(s):  
Raman Spectra ◽  
Infrared Spectra ◽  
Infrared And Raman Spectra ◽  
Vibrational Assignment ◽  
Difference Tones ◽  
Modified Assignments ◽  
Depolarization Ratios

The Raman spectra of liquid (CD3)3CH and (CD3)3CD were obtained photoelectrically together with depolarization ratios, and the infrared spectra of the corresponding gases were obtained from 3 to 35 μ. A vibrational assignment consistent with depolarization ratios and band contours has been made for the molecules on the basis of C3v symmetry. The spectra have been correlated with the spectra of (CH3)3CH and (CH3)3CD and modified assignments for two modes have been given for these molecules. Tentative assignments have been made for the 'inactive' A2 modes (which are 'active' if the molecule has symmetry C3) to explain some of the observed frequencies around 1000 cm.−1 which could not be satisfactorily assigned as summation or difference tones.

Infrared and Raman spectra and vibrational assignment of methylene cyclopropane-h6 and -d6

1970 ◽  
Vol 48 (24) ◽  
pp. 3889-3902 ◽  
Author(s):  
J. E. Bertie ◽  
M. G. Norton
Keyword(s):  
Liquid Phase ◽  
Gas Phase ◽  
Raman Spectra ◽  
Infrared Spectra ◽  
Infrared And Raman Spectra ◽  
Vibrational Assignment ◽  
Isotope Shifts ◽  
Liquid Phases ◽  
Modes Of Vibration ◽  
Depolarization Ratios

Infrared spectra have been recorded in the range 4000 to 20 cm−1 for methylene cyclopropane-h6 and -d6 in the gas phase, and from 4000 to 200 cm−1 for methylene cyclopropane-h6 in the liquid phase. Raman spectra have been recorded for the liquid phases of both species. The fundamental modes of vibration have been assigned using i.r. band contours and Raman depolarization ratios, with the exception of the i.r. inactive A2 modes which were not observed. An interesting feature is the occurrence of remarkably small isotope shifts for certain modes.

Vibrational Spectra of Triphenyl Compounds of Group VA Elements

1969 ◽  
Vol 23 (1) ◽  
pp. 12-16 ◽  
Author(s):  
Kosuke Shobatake ◽  
Clarence Postmus ◽  
John R. Ferraro ◽  
Kazuo Nakomoto
Keyword(s):  
Raman Spectra ◽  
Vibrational Spectra ◽  
Phenyl Group ◽  
Normal Coordinate Analysis ◽  
Infrared And Raman Spectra ◽  
Normal Coordinate ◽  
Bending Vibrations ◽  
Depolarization Ratios

The infrared and Raman spectra of triphenyl compounds of Group VA elements PPh3, AsPh3, SbPh3, and BiPh3 (Ph represents the phenyl group), have been reported in the 530–100 cm−1 region. The metal-phenyl stretching and bending vibrations have been assigned with the aid of approximate normal coordinate analysis and depolarization ratios of Raman lines.

The Preparation and Low-Frequency Vibrational Spectra of Some Copper(I) and Silver(I) Alkane- and Arene-monothiolate Complexes

1979 ◽  
Vol 32 (7) ◽  
pp. 1443 ◽  
Author(s):  
GA Bowmaker ◽  
L Tan
Keyword(s):  
Raman Spectra ◽  
Infrared Spectra ◽  
Vibrational Spectra ◽  
Low Frequency ◽  
Far Infrared ◽  
New Methods ◽  
Thiolate Complexes ◽  
New Compounds ◽  
First Time ◽  
Far Infrared Spectra

A number of different methods for preparing anionic Group 1B metal thiolate complexes have been investigated. The compounds [Me4N] [CU2(SMe)3] and [Et4N] [Ag5(SBut)6] are reported for the first time, and new methods for preparing the previously known compounds [Et4N] [Cu5(SBut)6], [Me4N]2 [CU5(SPh)7] and [Et4N]2 [Cu5(SPh)7] are described. The far-infrared spectra of the above compounds, and of CuSMe, CuSBut, AgSBut, [Me4N]2 [CU4(SPh)6] and [Me4N]2 [Ag5(SPh)7] have been obtained, and metal-sulfur stretching bands are assigned in the 150-350 cm-1 region. The low-frequency Raman spectra have also been obtained for some of these compounds. Possible structures for the new compounds are considered in the light of the low-frequency vibrational spectra.

The Vibrational Spectra of α-Bromoacetaldehyde Dimethyl Acetal and Related Molecules

1975 ◽  
Vol 29 (6) ◽  
pp. 501-506 ◽  
Author(s):  
J. E. Katon ◽  
Philip D. Miller
Keyword(s):  
Liquid Phase ◽  
Infrared Spectra ◽  
Vibrational Spectra ◽  
Low Temperatures ◽  
Conformational Equilibrium ◽  
Dimethyl Acetal ◽  
Vibrational Assignment ◽  
Crystal State ◽  
Apparent Evidence

The complete vibrational spectra of α-bromoacetaldehyde dimethyl acetal and α-bromoacetaldehyde dimethyl s6 have been recorded on the pure liquids, and a tentative vibrational assignment has been proposed. The infrared spectra of both compounds in the crystal state have also been recorded at low temperatures. There is no apparent evidence of a conformational equilibrium in the liquid phase. The infrared spectra of three other acetals have been recorded, and the data from all of the compounds are discussed in terms of previously proposed group frequencies of acetals in both the infrared and Raman.

Vibrational spectra of some isonitrile complexes of cobalt(I) and (II)

1970 ◽  
Vol 48 (5) ◽  
pp. 838-844 ◽  
Author(s):  
P. M. Boorman ◽  
P. J. Craig ◽  
T. W. Swaddle
Keyword(s):  
Raman Spectra ◽  
Infrared Spectra ◽  
Vibrational Spectra ◽  
Low Frequency ◽  
Trigonal Bipyramidal ◽  
Dimeric Complexes

The Raman and low-frequency infrared spectra of the trigonal-bipyramidal complexes Co(RNC)5ClO4(R = Me, Et, Ph) have been recorded and assigned. It is found that δ(CoCN) modes occur at higher frequencies than ν(Co—CN) modes. Although Raman spectra of the blue and yellow forms of Co(PhNC)5(ClO4)2 could not be obtained, the low-frequency infrared spectra are consistent with the C4v structure previously suggested (1). The dimeric complexes Co2(RNC)10(ClO4)4 (R = Me, Et) have been studied, and tentative assignments of the Raman and infrared spectra made on the basis of D4d symmetry. Spectra of the complexes Co2(RNC)10I(ClO4)3 (R = Me, Et) strongly support the previously suggested structural formulation (2) [(MeNC)5Co—I—Co(MeNC)5](ClO4)3, and furthermore indicate that the Co—I—Co skeleton is linear.

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