ISSN:0377-0486    

DOI:10.1002/jrs.1250040302

出版商:John Wiley&Sons, Ltd.    

年代:1976

数据来源: WILEY

ISSN:0377-0486    

DOI:10.1002/jrs.1250040303

出版商:John Wiley&Sons, Ltd.    

年代:1976

数据来源: WILEY

摘要:

AbstractPolarized Raman spectra of single crystals of (NH4)2IO6are recorded at 270 K and 24 K and analyzed. The failure of the selection rules does not allow a choice between the two structures proposed for the low temperature phase.

ISSN:0377-0486    

DOI:10.1002/jrs.1250040304

出版商:John Wiley&Sons, Ltd.    

年代:1976

数据来源: WILEY

摘要:

AbstractThe Raman spectra of crystalline methyl halides and the deuterated analogues were investigated at liquid nitrogen temperature. The weak band newly observed at 156 cm−1in the spectrum of CH3Cl has been assigned to the rotational lattice mode about the molecular symmetry axis. Three translational lattice vibrations were also found at 84, 71, and 60 cm−1for CH3Cl (83, 68, and 59 cm−1for CD3Cl). Of the seven and six lattice vibrations of methyl bromide and methyl iodide, respectively, two higher frequency bands were assigned to the rotational modes and the rest were assigned to the translational modes. The present experimental results are interpreted in terms of the crystal structures,C2νfor methyl chloride andD2hfor methyl bromide and methyl

ISSN:0377-0486    

DOI:10.1002/jrs.1250040305

出版商:John Wiley&Sons, Ltd.    

年代:1976

数据来源: WILEY

摘要:

AbstractInfrared and Raman spectra are reported for polycrystalline perchloro‐[4]‐radialene and for solutions in CCl4and CS2. An earlier X‐ray structure determination by van Remoortere and Boer has shown that in the crystal the molecular symmetry is almostD2d(puckered ring), but is slightly distorted toC2. This distortion was attributed to crystal packing forces. The vibrational spectrum does not show the distortion. The spectra are essentially the same for polycrystalline solid as for solution, and are completely compatible withD2din both states. Assignments are made for a few of the modes where evidence warrants it. Some observations are also made about the mass spectrum, which has a rich structure because of the many isotopic sp

ISSN:0377-0486    

DOI:10.1002/jrs.1250040306

出版商:John Wiley&Sons, Ltd.    

年代:1976

数据来源: WILEY

摘要:

AbstractThe theory of the Raman intensity of crystal powders given by Schrader and Bergmann [8] describes the radiation balance of a turbid medium by a scattering moduler, an absorption moduleaand a Raman scattering modules.On the base of this theory the necessary experimental conditions and the evaluation procedure for the determination of absolute Raman scattering cross sections are given.

ISSN:0377-0486    

DOI:10.1002/jrs.1250040307

出版商:John Wiley&Sons, Ltd.    

年代:1976

数据来源: WILEY

摘要:

AbstractThe nature of various electrode‐electrolyte interfaces have been investigated using vibrational Raman spectroscopy. This novel application of Raman spectroscopy has provided previously inaccessible structural evidence on the environment close to the electrode surfac

ISSN:0377-0486    

DOI:10.1002/jrs.1250040308

出版商:John Wiley&Sons, Ltd.    

年代:1976

数据来源: WILEY

摘要:

AbstractThe pure rotational Raman spectra of cycloheptane (C7H14) and cyclooctane (C8H16) vapor were photographed using a high resolution plane grating spectrograph. Both spectra resemble those of symmetric top rotors. The spectrum of cycloheptane has well developed R‐ and S‐branches while for cyclooctane the R‐branch lines are only just observable. The molecular constants obtained for these two molecules are for cycloheptane:B=0.099 3801±0.000 0047 cm−1andDJ=(4.08± ±0.17) × 10−8cm−1while for cyclooctane:B0.073 221±0.000 039 cm−1andDJ=(0.784±0.039) × 10−8cm−1where the quoted errors are one standard deviation. Since both molecules exist at room temperature in several conformations these constants are average values o

ISSN:0377-0486    

DOI:10.1002/jrs.1250040309

出版商:John Wiley&Sons, Ltd.    

年代:1976

数据来源: WILEY

摘要:

AbstractThe Raman spectra of the cyclohexyl halide‐thiourea clathrates have been investigated. It is found that whereas cyclohexyl chloride and bromide exist only in the axial conformation in the clathrate, cyclohexyl iodide exists in both the axial and equatorial conformations in the clathrat

ISSN:0377-0486    

DOI:10.1002/jrs.1250040310

出版商:John Wiley&Sons, Ltd.    

年代:1976

数据来源: WILEY

摘要:

AbstractThe resonance Raman spectra are presented for Ni‐porphin and Cu‐porphin‐d4(meso) as dilute solutions in CS2and C2Cl4using an Ar+laser and a tunable Rhodamine 6G dye laser. The Raman features are assigned to the different vibrational species on the basis of their depolarization data. The assignment of 14 features in the spectrum of Cu‐porphin‐d4and 13 features in the spectrum of Cu‐porphin and Ni‐porphin is discussed by comparing the spectra of the three molecules. Also the infrared spectrum of Cu‐porphin‐d4as a solid dispersed in CsI matrix is reported for the 20

ISSN:0377-0486    

DOI:10.1002/jrs.1250040311

出版商:John Wiley&Sons, Ltd.    

年代:1976

数据来源: WILEY