摘要:

AbstractLow frequency Raman spectra of diazepam have been recorded at various temperatures between 103 and 396 K. Far IR spectra are also reported at room temperature. The observed frequencies of the lattice modes are compared with those calculated using a semi‐empirical intermolecular potential. The transferability of the atom‐atom potentials leads to good agreement between the two sets of frequenc

ISSN:0377-0486    

DOI:10.1002/jrs.1250110402

出版商:John Wiley&Sons, Ltd.    

年代:1981

数据来源: WILEY

摘要:

AbstractRaman and infrared spectra of phosphatidylcholine‐acid mixtures (1:1) are reported and discussed in terms of both general structural and specific interactions as a function of the acidic strength of the proton donor. The infrared spectra indicate the formation of a strong, highly polarizable hydrogen bond with monochloro‐, dichloro‐ and trichloroacetic acids. The complete transfer of the proton from the donor to the phospholipid is observed with hydrochloric acid. The Raman data suggest conformational changes in the lateral packing of the acylic chains of the phospholipid. The importance of both these specific interactions, namely hydrogen bonding and structural modifications, in biological systems is discussed and related to biological act

ISSN:0377-0486    

DOI:10.1002/jrs.1250110403

出版商:John Wiley&Sons, Ltd.    

年代:1981

数据来源: WILEY

摘要:

AbstractPolarized Raman and IR spectra of a single KY(MoO4)2crystal were measured in the 10–4000 cm−1region and discussed in relation to the molecular and crystal structures. Spectroscopic data enabled us to reveal additional intermolecular interactions due to pair coupling of the molybdate tetrahedra verifying information on the crystal layer structure of double molybdates from the KLn(MoO4)2fam

ISSN:0377-0486    

DOI:10.1002/jrs.1250110404

出版商:John Wiley&Sons, Ltd.    

年代:1981

数据来源: WILEY

摘要:

AbstractRaman spectra of red and yellow forms of HgI2have been recorded as a function of temperature and pressure. Temperatures between 77 and 570 K and pressures up to 14 khar have been used to investigate the vibrational modes of four (and possibly five) phases of this material. No evidence could be found from the Raman spectrum to support the suggestion that a thermal anomaly within the stability range of the red form indicates a III to IV transition. Clear differentiation between the yellow high temperature and high pressure phases has been shown, and the phase boundary (YHP→YHT) located. A previously unreported Raman spectrum of an orange phase is shown, and a modified phase diagram is presente

ISSN:0377-0486    

DOI:10.1002/jrs.1250110405

出版商:John Wiley&Sons, Ltd.    

年代:1981

数据来源: WILEY

摘要:

AbstractLaser Raman spectroscopy permits the study of black graphitic materials. Intercalated compound of first stage obtained with H2SO4will be appear to contain the ion S2O72−. The frequencies of Raman active modeE2g2of graphite network are in good agreement with this result. The interaction between graphitic plane and this intercalated molecule is weaker than in material obtained by action of HSO3F on graphit

ISSN:0377-0486    

DOI:10.1002/jrs.1250110406

出版商:John Wiley&Sons, Ltd.    

年代:1981

数据来源: WILEY

摘要:

AbstractThe medium resolution Raman spectrum of gaseous phenol has been recorded between 4000 and 50 cm−1using the 5145 Å line of an argon laser. A number ofa′ bands have been observed which correspond to previously assigned normal modes, but lines at 1388 and 1285 cm−1, which are not normally observed in the infrared spectrum of the gas, have been assigned as fundamentals. In addition, a strong Raman band at 1007 cm−1is probably an overtone of an out‐of‐plane vibration at 503 cm−1in resonance with a nearbya′ fundamental. Two bands at 824 and 810 cm−1were both found to belong to the symmetrica′ species. Previous assignments have dealt with these two bands as having different symmetries. A reassignment of some of the fundamentals of phenol may be necessary to account for thes

ISSN:0377-0486    

DOI:10.1002/jrs.1250110407

出版商:John Wiley&Sons, Ltd.    

年代:1981

数据来源: WILEY

摘要:

AbstractThe polarized Raman and FIR spectra of a β‐naphthol single crystal have been recorded in the 10–200 cm−1region. The spectra have been interpreted on the basis of an oriented gas model associated with lattice dynamic calculations assuming a ‘6‐exp.’ potential between non‐bonded atoms and a simple harmonic force constant between oxygen atoms linked by

ISSN:0377-0486    

DOI:10.1002/jrs.1250110408

出版商:John Wiley&Sons, Ltd.    

年代:1981

数据来源: WILEY

摘要:

AbstractComparison of Raman and IR spectra ofD0; ‐4,5D2; ‐3,3,6,6D4trans‐4,5 dicyano cyclohexenes and study of polarized Raman spectra ofD0andD4single crystal varieties allowed to classify in theAandBsymmetry classes the 48 normal modes of these molecules specifying those which originate from (HCCN)2sequence. A conformational effect was found from the dissolved molecules spectra invest

ISSN:0377-0486    

DOI:10.1002/jrs.1250110409

出版商:John Wiley&Sons, Ltd.    

年代:1981

数据来源: WILEY

摘要:

AbstractRaman and infrared spectroscopic investigation of 3r, 4t, 5cand 3r, 4c, 5tdiastereoisomers ofd0, ‐3,6,6d3and ‐3,4,5,6,6d5, ‐3 tertiobutyl, ‐4,5 dicyano cyclohexenes in the solid and dissolved states is performed. From conformational and Teller Redlich product rule considerations, the whole fundamental vibrations are assigned. Specific vibrations relative to (XCCN)2(X = H or D) groups with diequatorial or diaxial nitriles a

ISSN:0377-0486    

DOI:10.1002/jrs.1250110410

出版商:John Wiley&Sons, Ltd.    

年代:1981

数据来源: WILEY

摘要:

AbstractRaman spectra of anhydrous crystalline samples of all of the lanthanide orthophosphates (with the exception of PmPO4) have been obtained. These data were interpreted in a systematic manner based on the known structures of these compounds. Assignments and correlations have been made for many of the observed bands.

ISSN:0377-0486    

DOI:10.1002/jrs.1250110411

出版商:John Wiley&Sons, Ltd.    

年代:1981

数据来源: WILEY