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.

scholarly journals Röntgenstrukturanalyse und Schwingungsspektren von Trischwefeldistickstoffdioxid, S3N2O2 [1] / X-ray Structural Analysis and Vibrational Spectra of Trisulfurdinitrogendioxide, S3N2O2 [1]

1980 ◽  
Vol 35 (7) ◽  
pp. 792-796 ◽  
Author(s):  
Ralf Steudel ◽  
Jürgen Steidel ◽  
Norbert Rautenberg
Keyword(s):  
Molecular Structure ◽  
Structural Analysis ◽  
Raman Spectra ◽  
Conformational Changes ◽  
Vibrational Spectra ◽  
Crystal And Molecular Structure ◽  
Infrared And Raman Spectra ◽  
Molecular Symmetry ◽  
Torsion Angles ◽  
X Ray

A redetermination of the crystal and molecular structure of the chain-like molecule S(NSO)2 resulted in the following molecular parameters: d(SO) = 146.5(2), d(S = N) = 153.4(2), d(S-N) = 165.7(2) pm, bond angles OSN = 117.5(1)°, SNS = 123.6(2)°, and NSN = 97.2(1)°, torsion angles OSNS = -0.3(2)°, and SNSN = -177.7(2)° (molecular symmetry C2). Infrared and Raman spectra of S(NSO)2 are reported and assigned; there is no evidence for conformational changes on dissolution of crystalline S(NSO)2

1.4-Dioxan · H2O · SbCl5; Schwingungsspektren, Kristall- und Molekülstruktur / 1,4-Dioxane · H2O · SbCl5; Vibrational Spectra, Crystal and Molecular Structure

1978 ◽  
Vol 33 (2) ◽  
pp. 136-139 ◽  
Author(s):  
W. Schwarz ◽  
A. Schmidt ◽  
G. E. Binder
Keyword(s):  
Molecular Structure ◽  
Vibrational Spectra ◽  
Crystal And Molecular Structure ◽  
Unit Cell ◽  
Addition Compound ◽  
Space Group ◽  
Lattice Constants ◽  
Chloride Water ◽  
Hydrogen Bonded

The preparation of the 1:1:1 addition compound 1 of 1,4-dioxane, water and antimony(V) chloride is described. 1 crystallizes in the space group Cmcm with the lattice constants a = 8.494, b = 11.453, c = 13.030 Å with four formula units in the unit cell. The dioxane is strongly hydrogen bonded to an antimony(V) chloride water adduct. The vibrational spectra of the solid are assigned

Vibrational Spectra of N2H5HC2O4 and N2D5DC2O4

1975 ◽  
Vol 53 (9) ◽  
pp. 1387-1392 ◽  
Author(s):  
R. Savoie ◽  
M. Guay
Keyword(s):  
Phase Transition ◽  
High Temperature ◽  
Low Temperature ◽  
Crystal Structures ◽  
Raman Spectra ◽  
Vibrational Spectra ◽  
Unit Cell ◽  
Infrared And Raman Spectra ◽  
Solid Phases ◽  
High Temperature Modification

Infrared and Raman spectra of N2H5HC2O4 and N2D5DC2O4 have been recorded at various temperatures between 77 and 300 K. The results at 300 K are consistent with the known crystal structures of these solids. A phase transition has been detected at ∼ 240 K in N2D5DC2O4 and although there are similarities between the two stable solid phases of this compound, the low-temperature form appears to be centrosymmetric and to have a larger unit cell than the high-temperature modification.

Vibrational spectra of mercury(II) and methylmercury(II) thiocyanates

1969 ◽  
Vol 22 (10) ◽  
pp. 2117 ◽  
Author(s):  
RPJ Cooney ◽  
JR Hall
Keyword(s):  
Raman Spectrum ◽  
Solid State ◽  
Raman Spectra ◽  
Infrared Spectra ◽  
Vibrational Spectra ◽  
Unit Cell ◽  
Infrared And Raman Spectra

The Raman spectra of Hg(SCN)2 in both the solid state and in solution have been recorded and interpreted in conjunction with the infrared spectra. For the solid state the Raman shifts for Hg-S stretching, S-C stretching, and C-N stretching are 270, 721, and 2112 cm-1 respectively. In diglyme solution the corresponding values are 278, 692, and 2139 cm- 1. The infrared and Raman spectra of CH3HgSCN in the solid state do not contain any coincidences which may indicate that the unit cell is centrosymmetric. The Raman spectrum of CH3HgSCN in CH3OH solution shows strong, sharp, polarized lines at 283, 540, 1186, and 2138 cm-1 which are attributed to Hg-S stretching, Hg-C stretching, CH3 deformation, and C-N stretching modes respectively.

dh-μ-Carboxilato-e-μ-hydroxo-f-μ-oxo-bis[trichloroantimony(V)] Ein durch Carbonsäuren stabilisiertes dimeres Antimonoxitrichlorid / dh-μ-Carboxilato-e-μ-hydroxo-f-μ-oxo-bis[trichloro-antimony(V)]A Dimeric Trichloro Antimony(V) Oxide Stabilized by Carboxilic Acids

1979 ◽  
Vol 34 (4) ◽  
pp. 563-568 ◽  
Author(s):  
Franz-J. Koller ◽  
Wolfgang Schwarz ◽  
Armin Schmidt
Keyword(s):  
Molecular Structure ◽  
Hydrogen Bonds ◽  
Vibrational Spectra ◽  
Crystal And Molecular Structure ◽  
X Ray ◽  
New Type

Abstract Tetrachloroantimony(V) carboxilates and tetrachloroantimony(V) alkoxides, resp., react with carboxilic acids and alkohols or water, resp., to yield d,h-μ-carboxilato-e-μ-hydroxo-f-μ-oxo-bis[trichloroantimony(V)] (1, R = H, CH3), a new type of cyclic antimony(V) compounds. The crystal and molecular structure of 1 (R = CH3) is determined by X-ray analysis. Units of 1 (R - CH3) are associated by strong hydrogen bonds. The vibrational spectra of 1 (R = H, CH3) are discussed.

Infrared and Raman Spectra of Phthalimide-15N-H and Phthalimide-15N-D

1989 ◽  
Vol 43 (1) ◽  
pp. 118-122 ◽  
Author(s):  
J. F. Arenas ◽  
J. I. Marcos ◽  
F. J. Ramírez
Keyword(s):  
Solid State ◽  
Hydrogen Bonds ◽  
Force Field ◽  
Raman Spectra ◽  
Vibrational Spectra ◽  
Molecular Geometry ◽  
The Other ◽  
Infrared And Raman Spectra ◽  
Intermolecular Hydrogen Bonds ◽  
Force Method

A study of the infrared and Raman spectra of previously synthesized phthalimide-15N-H and phthalimide-15N-D has been carried out. With the new data obtained, the vibrational spectra of the phthalimide molecule in a C2 v* symmetry has been reassigned, but taking into account that the molecule in the solid state forms dimers bonded by intermolecular hydrogen bonds; these dimers have a Ci symmetry. On the other hand, a semi-empiric calculation of the force fields of this molecule has been carried out by the MINDO/3-FORCE method, which required a prior optimization of the molecular geometry; the force field was transformed to the space of internal coordinates.

Vibrational spectra of aquadioxotetra; peroxodivanadates(V) M2[V2O2(O2)4(H2O)]·xH2O (M = N(CH3)4, Cs)

1990 ◽  
Vol 55 (6) ◽  
pp. 1485-1490 ◽  
Author(s):  
Peter Schwendt ◽  
Milan Sýkora
Keyword(s):  
Raman Spectra ◽  
Vibrational Spectra ◽  
Normal Coordinate Analysis ◽  
Force Constants ◽  
Infrared And Raman Spectra ◽  
Empirical Correlations ◽  
Normal Coordinate ◽  
Bond Lengths ◽  
Stretching Vibrations

The infrared and Raman spectra of M2[V2O2(O2)4(H2O)]·xH2O and M2[V2O2(O2)4(D2O)]·xD2O (M = N(CH3)4, Cs) were measured. In the region of the vanadium-oxygen stretching vibrations, the spectra were interpreted based on normal coordinate analysis, employing empirical correlations between the bond lengths and force constants.

Determination of the structure of bis(propyldithiocarbamate)nickel(II)

1990 ◽  
Vol 55 (4) ◽  
pp. 1010-1014 ◽  
Author(s):  
Jiří Kameníček ◽  
Richard Pastorek ◽  
František Březina ◽  
Bohumil Kratochvíl ◽  
Zdeněk Trávníček
Keyword(s):  
Molecular Structure ◽  
Title Compound ◽  
Crystal And Molecular Structure ◽  
Heavy Atom ◽  
Unit Cell ◽  
Monoclinic Space Group ◽  
Planar Configuration ◽  
Compound C ◽  
Heavy Atom Method

The crystal and molecular structure of the title compound (C8H16N2NiS4) was solved by the heavy atom method and the structure was refined anisotropically to a final R factor of R = 0.029 (wR = 0.037) for 715 observed reflections. The crystal is monoclinic, space group P21/c with a = 948.3(2), b = 776.9(2), c = 1 167.4(2) pm, β = 125.14(2)°, Z = 2. The molecule contains two four-membered NiSCS rings of approximately planar configuration with the Ni atom situated at a centre of symmetry. The molecules are arranged in chains along the c-axis of the unit cell.

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