Étude vibrationnelle des acides deltiques C3O3H2 et C3O3D2

1985 ◽  
Vol 63 (7) ◽  
pp. 1394-1398 ◽  
Author(s):  
Alain Lautié ◽  
Marie-France Lautié ◽  
Alexandre Novak
Keyword(s):  
Hydrogen Bonds ◽  
Raman Spectra ◽  
Crystal Symmetry ◽  
Infrared And Raman Spectra ◽  
Molecular Symmetry ◽  
Space Group ◽  
Deuterated Derivative

The infrared and Raman spectra of crystalline deltic acid and its deuterated derivative have been investigated in the 4000–20[Formula: see text]cm−1 range. An assignment of all the intramolecular fundamentals has been proposed assuming a C2v molecular symmetry. The crystal symmetry is likely to be described by the [Formula: see text] or P2/m space group with Z = 2. Deltic acid molecules probably form infinite chains linked with two very strong, asymmetric, and different OH … O hydrogen bonds, with O … O distances estimated at 2.49 and 2.56 Å.

Synthesis, crystal and molecular structure, and vibrational spectra of the complex (COOH)2•2H2O•18-crown-6

1986 ◽  
Vol 64 (1) ◽  
pp. 142-147 ◽  
Author(s):  
Suzanne Deguire ◽  
François Brisse ◽  
Jacques Ouellet ◽  
Rodrigue Savoie
Keyword(s):  
Molecular Structure ◽  
Hydrogen Bonds ◽  
Oxalic Acid ◽  
Raman Spectra ◽  
Vibrational Spectra ◽  
Crystal And Molecular Structure ◽  
Unit Cell ◽  
Infrared And Raman Spectra ◽  
O 18 ◽  
Stoichiometric Complex

A stoichiometric complex of formula (COOH)2•2H2O•18-crown-6 has been obtained from oxalic acid and the macrocyclic polyether 18-crown-6. The crystals of the complex have a monoclinic unit cell and belong to the P21/c space group. The components in the adduct are linked through hydrogen bonds in a polymer-like fashion: -crown–H2O–HOOCCOOH–OH2–crown–, where the oxalic acid molecules are present in two distinct disordered orientations. The infrared and Raman spectra of the complex are also reported and interpreted.

Kristallstruktur und Schwingungsspektren des Di-Blei-Hexaselenohypodiphosphates Pb2P2Se6 / Crystal Structure and Vibrational Spectra of Pb2P2Se6

1984 ◽  
Vol 39 (4) ◽  
pp. 357-361 ◽  
Author(s):  
Robert Becker ◽  
Wolfgang Brockner ◽  
Herbert Schäfer
Keyword(s):  
Crystal Structure ◽  
Raman Spectra ◽  
Vibrational Spectra ◽  
Title Compound ◽  
Far Infrared ◽  
Infrared And Raman Spectra ◽  
Monoclinic System ◽  
Space Group ◽  
Lattice Constants

Pb2P2Se6 crystallizes in the monoclinic system, space group Pn (No. 13) with the lattice constantsa = 974.2 (4) pm. b = 766.2 (3) pm. c = 689.8 (3) pm, β=91.44(5)°.The title compound is isotypic to the homologous Pb2P2S6. In the structure there are discrete P2Se4-6 anions.Far infrared, infrared and Raman spectra of this compound have been recorded. The observed frequencies are assigned on the basis of P2Se4-6 units with C2h symmetry in the crystal. DTA-data have been determined and interpreted.

ChemInform Abstract: HYDROGEN BONDS IN CALCIUM ACID PHOSPHATES BY INFRARED AND RAMAN SPECTRA

1985 ◽  
Vol 16 (21) ◽  
Author(s):  
A. BERTOLUZZA ◽  
M. A. BATTAGLIA ◽  
S. BONORA ◽  
P. MONTI ◽  
R. SIMONI
Keyword(s):  
Hydrogen Bonds ◽  
Raman Spectra ◽  
Infrared And Raman Spectra

Matrix-Isolation Studies and Ring Conformation of 1,3-Dithietane

1979 ◽  
Vol 33 (4) ◽  
pp. 361-364 ◽  
Author(s):  
V. F. Kalasinsky ◽  
E. Block ◽  
D. E. Powers ◽  
W. C. Harris
Keyword(s):  
Solid State ◽  
Raman Spectra ◽  
Crystal Packing ◽  
Mutual Exclusion ◽  
Infrared And Raman Spectra ◽  
Molecular Symmetry ◽  
Free Molecule ◽  
Ring Conformation ◽  
Argon Matrix ◽  
The Matrix

The infrared and Raman spectra of 1,3-dithietane have been recorded with the sample in the solid state and trapped in an argon matrix at 18K. The number of coincidences between the infrared and Raman spectra of the matrix-isolated sample is consistent with C2v molecular symmetry in which the ring has a puckered conformation. In the solid state a number of bands disappear upon annealing, and the observed mutual exclusion for the annealed solid can be interpreted in terms of D2h, symmetry. Whereas the matrix probably represents the “free” molecule, the planarity of the ring in the annealed solid can be attributed to crystal packing.

Hydrogen bonds in calcium acid phosphates by infrared and Raman spectra

1985 ◽  
Vol 127 (1-2) ◽  
pp. 35-45 ◽  
Author(s):  
Alessandro Bertoluzza ◽  
Maria Angela Battaglia ◽  
Sergio Bonora ◽  
Patrizia Monti ◽  
Rosa Simoni
Keyword(s):  
Hydrogen Bonds ◽  
Raman Spectra ◽  
Infrared And Raman Spectra

Kristallstruktur und Schwingungsspektren des Di-Blei-Hexathiohypodiphosphates Pb2P2S6 / Crystal Structure and Vibrational Spectra of Pb2P2S6

1983 ◽  
Vol 38 (8) ◽  
pp. 874-879 ◽  
Author(s):  
Robert Becker ◽  
Wolfgang Brockner ◽  
Herbert Schäfer
Keyword(s):  
Crystal Structure ◽  
Raman Spectra ◽  
Vibrational Spectra ◽  
Far Infrared ◽  
Infrared And Raman Spectra ◽  
Monoclinic Modification ◽  
Monoclinic System ◽  
Space Group ◽  
Lattice Constants

Abstract Pb2P2S6 crystallizes in the monoclinic system, space group Pn with the lattice constants a = 940.2(4) pm, b= 746.6(3) pm, c = 661.2(3) pm, β = 91.53(5)°. The compound is isotypic to the monoclinic modification II of Sn2P2S6 . In the structure there are discrete P2S4-6 -anions.Far infrared, infrared and Raman spectra of this compound have been recorded. The observed frequencies are assigned on the basis of P2S4-6 units with C2h symmetry in the crystal. DTA-data have been determined and interpreted.

Internal Vibrations of the Tellurate Group in Compounds Me2(III)Te(VI)O6

1974 ◽  
Vol 29 (3-4) ◽  
pp. 153-155 ◽  
Author(s):  
G. Blasse ◽  
J. G. Kamphorst
Keyword(s):  
Raman Spectra ◽  
Spectral Position ◽  
Vibrational Modes ◽  
Infrared And Raman Spectra ◽  
Quenching Temperature ◽  
Space Group ◽  
Internal Vibrations

The infrared and Raman spectra of LaAlTeOe, LaGaTeO6, In2TeO6 and Y2TeO6 are reported. Structure proposals are confirmed and the space group of Y2TeO6 determined. A relation between spectral position of vibrational modes and quenching temperature of luminescence is outlined.

scholarly journals VERY LOW H–O–H BENDING FREQUENCIES. VI. VIBRATIONAL SPECTRA OF CdCl2·H2O

2017 ◽  
Vol 38 (1) ◽  
pp. 91
Author(s):  
Viktor Stefov ◽  
Metodija Najdoski ◽  
Bernward Engelen ◽  
Zlatko Ilievski ◽  
Adnan Cahil
Keyword(s):  
Hydrogen Bonds ◽  
Water Molecule ◽  
Gas Phase ◽  
Raman Spectra ◽  
Structural Data ◽  
Liquid Nitrogen Temperature ◽  
Water Molecules ◽  
Deuterium Content ◽  
Infrared And Raman Spectra ◽  
The Difference

The infrared and Raman spectra of CdCl2·H2O as well as those of a series of its partially deuterated analogues were recorded at room and at liquid-nitrogen temperature (RT and LNT, respectively). The combined results from the analysis of the spectra were used to assign the observed bands. In the difference IR spectrum of the compound with low deuterium content (≈ 4 % D) recorded at RT, one broad bands is observed at around 2590 cm–1 while in the LNT spectrum two bands appear (at 2584 cm–1 and 2575 cm–1). The appearance in the LNT spectrum of these two bands which are due to the stretching OD modes of the isotopically isolated HDO molecules points to the existance of two crystallographically different hydrogen bonds and is in accordance with the structural data for this compound. In the LNT infrared and Raman spectra of the protiated compound, one band, at 1583 cm-1, is observed in the region of the bending НОН vibrations with a frequency that is decreasing with lowering the temperature. An interesting finding related to this band is that its frequency is lower than that for the water molecule in the gas phase (1594 cm–1). In the RT and LNT IR spectra, only one strong band (at 560 cm–1) is observed in the region of the librations of water molecules (700 cm–1 – 400 cm–1).

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