Showing papers in "Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy in 1980"

TL;DR: In this article, the Raman spectra of polycrystalline boehmite (γ-AlOOH) and its deuterated analogue have been measured and analysed together with existing ir data.

TL;DR: In this article, an equation for the correction of the finite slit width effect on line widths of Lorentzian Raman lines is derived for up to S/δa = 0.7, more applicable than those proposed previously.

TL;DR: In this article, the i.r. spectra of phtalic, isophtalic and terephtalic acids as KBr pellets as well as Raman Spectra of microcrystalline powder have been investigated.

TL;DR: The spectral properties of 2,6-pyridinedicarboxylic acid at 100 K have been investigated in this article, where cyclic centrosymmetric dimeric structures involving the carboxyl groups in the acid are proposed to explain the spectral features of this compound.

TL;DR: In this paper, the far i.r. spectra of crystalline powders of uracil, cytosine, thymine, xanthine and hypoxanthine, from 25 to 1000 cm−1 were reported.

TL;DR: In this paper, the i.r. and Raman spectra of liquid and crystalline indole, indolizine and numerous deuterated derivatives have been investigated between 4000 and 200 cm−1.

TL;DR: In this paper, the i.r. spectra of acetophenone and their deuterated analogues in the liquid-phase were recorded and analyzed in the range 4000-130 cm −1.

TL;DR: The theory of solvatochromic shifts in solvents of different dielectric constants and refractive indexes can be used to measure both the absolute value and the direction of dipole moment vectors in excited states as discussed by the authors.

TL;DR: In this article, a 25-parameter harmonic force field was calculated from the 12 fundamentals (gas phase frequencies) and 12 frequency shifts (matrix) of four isotopic species.

TL;DR: In this article, the Coriolis coupling constant ξ a 13,18 was derived from the i.r. and from the microwave spectra of 1-butene-3-yne.

TL;DR: In this article, the Raman spectra of adamantane, diamantane and triamantane were investigated between 10 and 300 K and the results showed that all three solids show transitions to a pre-melting plastic phase; the plastic transition in adamantane is investigated and also the solid-solid phase transitions in diamantanes and triamsantane.

TL;DR: In this article, the IR and Raman spectra of solid H 3 BO, Na[B(OH) 4 ], Na 2 [B 4 O 5 (OH)4 ]·8H 2 O.

TL;DR: In this paper, the vibrational relaxation widths of the i.r. raman and i. r. a 1 bands of acetonitrile, CH 3 CN and CD 3 CN, have been measured in the pure liquid and in solutions of isotopic compounds.

TL;DR: The ability of phthalocyanines to form complexes when exposed to pyridine vapours was investigated on the basis of assignments of i.r. spectra.

TL;DR: In this article, a corrected valence force field for benzene is presented, and the force constants have been determined by refining the observed and calculated frequencies of 13 C and deuterated isotopes.

TL;DR: In this paper, a Ramaman spectroscopic study was made on aqueous solutions of formaldehyde and deuterated solution of Formaldehyde-d2, in which the formaldehyde, its hydrate, namely methylene glycol, are equilibrated.

TL;DR: In this paper, the spectral properties of 1,4-dioxan and cyclopentanones have been analyzed in the 2800-3100 cm −1 range.

TL;DR: In this paper, a normal coordinate calculation by a valence force field treatment has been applied to previously published data on phenyldeuterated styrenes and results are in fairly good agreement with experimental.

TL;DR: Linear correlations between the spin-spin carbon carbon coupling constants and the carbon-carbon stretching force constants for single and double bonds have been found through analysis of the available literature data as mentioned in this paper.

TL;DR: New proposals for the pattern of hydrogen bonding that links the layers of boehmite (γ-AlOOH) were made in this article for the first time in the last decade.

TL;DR: In this article, the following zinc(II), cadmium(II) and mercury (II) complexes of neutral and deprotonated 4,6-dimethylpyrimidine-2(1H)-thione (HL) have been prepared and studied by conductometric and i.r.

TL;DR: In this article, a series of p -substituted cinnamonitriles were used to estimate the resonance effects of the benzene, ethylene and cyanide vibrations, and the relative importance of various mechanisms of transmission of electronic effects was discussed.

TL;DR: In this paper, the i.r. spectrum of α-cyanoacrylate adhesive molecule in the first monolayer on anodically oxidized aluminum has been obtained with a reflection method.

TL;DR: Powder Raman and far ir spectra of Na3SbS4 and single crystal Raman were measured in the temperature range T = 75-295 K as discussed by the authors, and the OH(D) stretching frequencies, ν = 3309(2449)−3422(2550) cm−1, support the existence of a marked hydrogen bond system not only between different water molecules, but also between the hydrate water molecules and the sulphur atoms of the SbS 4 groups in Schlippe's salt.

TL;DR: In this article, the i.r. and Raman spectra of N, N,N,N′,N-tetramethyl-p -phenylenediamine and the perchlorate salt of its radical cation have been recorded.

TL;DR: In this paper, the i.r. and Raman spectra of piperidine, pyrrolidine, morpholine, their N-methyl derivatives were obtained for the adsorbed state, aqueous solution, and liquid state.

TL;DR: In this article, the authors extended the spectrum of the 2100 A system of ammonia to include the dependence of the absorption spectrum on the temperature of the matrix and the observed temperature dependence of ammonia in argon are more satisfactorily explained for trapped ammonia molecules free to rotate without nuclear spin interconversion.

TL;DR: In this article, the rotational isomer equilibrium of 1,2-dichloroethane has been studied by condensing effusive molecular beams into an argon matrix, and it is shown that it is possible to trap the conformers in a ratio determined by the thermal equilibrium in the molecular beam source.

TL;DR: In this paper, a reinvestigation of the norbornadiene spectrum was necessary and a new set of assignments was given, where the shift in energy of bands I and II and the out-of-plane olefinic CH wagging modes, as well as the relative energies of the bands associated with the metal were investigated.