A New Organic-Cation Cyclotetraphosphate C10H28N4P4O12·4H2O: Crystal Structure, Thermal Analysis, and Vibrational Spectra

2001 ◽  
Vol 156 (2) ◽  
pp. 364-369 ◽  
Author(s):  
E.H Soumhi ◽  
I Saadoune ◽  
A Driss
Keyword(s):  
Crystal Structure ◽  
Thermal Analysis ◽  
Vibrational Spectra ◽  
Organic Cation

Formen des Diphenylgermaniumoxids(Ph2GeO)x, x = 3, 4, n / Phases of Diphenylgermanium Oxide(Ph2GeO)x, x = 3, 4, n

1984 ◽  
Vol 39 (7) ◽  
pp. 868-875 ◽  
Author(s):  
Ludwig Roß ◽  
Martin Dräger
Keyword(s):  
Crystal Structure ◽  
Thermal Analysis ◽  
Vibrational Spectra ◽  
Mass Spectra ◽  
Nmr Spectra ◽  
Membered Ring ◽  
Tetragonal Crystals ◽  
Hydroxy Groups ◽  
C Nmr

Diphenylgermanium oxide can be obtained trimeric (6 -membered ring, monoclinic crystals), tetrameric (8 -membered ring, monoclinic and tetragonal crystals and monoclinic with half a mole of crystal ethanol) and polymeric with terminating hydroxy groups. Transitions are investigated by thermal analysis, mass spectra and 13C NMR spectra. The vibrational spectra (I. R . and Raman) of the forms are discussed . The crystal structure of the monoclinic (Ph :GeO)4 has been determined and refined to R = 0.051. The symmetry of the molecule is near to S4 (distances Ge - O 174.7 - 176.2, Ge - C 190.0 - 194.6 pm, angles Ge - O - Ge 131.2 - 136.9, O - Ge - O 107.8 -110.3 °).

Crystal Structure, Vibrational Spectra and Thermal Analysis of Bis(saccharinato)bis(pyridine)zinc(II)

1997 ◽  
Vol 52 (2) ◽  
pp. 183-187 ◽  
Author(s):  
O. V. Quinzani ◽  
S. Tarulli ◽  
O. E. Piro ◽  
E. J. Baran ◽  
E. E. Castellano
Keyword(s):  
Crystal Structure ◽  
Thermal Analysis ◽  
Thermal Behavior ◽  
Single Crystal ◽  
Vibrational Spectra ◽  
Structural Characteristics ◽  
Monoclinic Space Group ◽  
X Ray ◽  
Related Compounds ◽  
Ir And Raman

Abstract The crystal structure of [Zn(sac)2(py)2] has been de termined by single-crystal X-ray diffractometry. It crystallizes in the monoclinic space group C2/c with Z = 4. We propose and discuss an assignment of its IR and Raman spectra, compatible with the structural characteristics. Its thermal behavior was investigated by means of TG and DTA methods. Some comparisons with related compounds are made.

ChemInform Abstract: BaN3Cl: Synthesis, Crystal Structure, Vibrational Spectra and Thermal Decomposition of Barium Azide Chloride.

ChemInform ◽  
2009 ◽  
Vol 40 (2) ◽  
Author(s):  
Bjoern Blaschkowski ◽  
Harald Balzer ◽  
Hans-Lothar Keller ◽  
Thomas Schleid
Keyword(s):  
Crystal Structure ◽  
Thermal Decomposition ◽  
Vibrational Spectra

Synthesis, crystal structure, luminescence, and photocatalytic properties of a 2D Cu(II) metal-organic frameworks based on 3,5-di(1H-benzimidazol-1-yl)pyridine and 4,4′-oxybis(benzoate) ligands

2020 ◽  
Vol 75 (8) ◽  
pp. 727-732
Author(s):  
Chen Zhang ◽  
Jian-Qing Tao
Keyword(s):  
Crystal Structure ◽  
Thermal Analysis ◽  
Uv Light ◽  
Metal Organic Framework ◽  
Metal Organic Frameworks ◽  
X Ray Diffraction ◽  
X Ray ◽  
Uv Light Irradiation ◽  
Photocatalytic Activities ◽  
Metal Organic

AbstractA new Cu(II) metal-organic framework, [Cu(L)(OBA)·H2O]n (1) [H2OBA = 4,4′-oxybis(benzoic acid), L = 3,5-di(1H-benzimidazol-1-yl)pyridine] was hydrothermally synthesized and characterized through IR spectroscopy, elemental and thermal analysis and single-crystal X-ray diffraction. Complex 1 is a four-connected uni-nodal 2D net with a (44·62) topology which shows an emission centered at λ ∼393 nm upon excitation at λ = 245 nm. Moreover, complex 1 possesses high photocatalytic activities for the decomposition of Rhodamine B (RhB) under UV light irradiation.

On tungstates of divalent cations (III) – Pb5O2[WO6]

2020 ◽  
Vol 235 (8-9) ◽  
pp. 311-317
Author(s):  
Stephan G. Jantz ◽  
Florian Pielnhofer ◽  
Henning A. Höppe
Keyword(s):  
Crystal Structure ◽  
Thermal Analysis ◽  
Quantum Chemical ◽  
Density Functional ◽  
Divalent Cations ◽  
X Ray Diffraction ◽  
Functional Theory ◽  
X Ray ◽  
First Results ◽  
Electrostatic Calculations

Abstract${\text{Pb}}_{5}{\text{O}}_{2}\left[{\text{WO}}_{6}\right]$ was discovered as a frequently observed side phase during our investigation on lead tungstates. Its crystal structure was solved by single-crystal X-ray diffraction ($P{2}_{1}/n$, $a=7.4379\left(2\right)$ Å, $b=12.1115\left(4\right)$ Å, $c=10.6171\left(3\right)$ Å, $\beta =90.6847\left(8\right)$°, $Z=4$, ${R}_{\text{int}}=0.038$, ${R}_{1}=0.020$, $\omega {R}_{2}=0.029$, 4188 data, 128 param.) and is isotypic with ${\text{Pb}}_{5}{\text{O}}_{2}\left[{\text{Te}}_{6}\right]$. ${\text{Pb}}_{5}{\text{O}}_{2}\left[{\text{WO}}_{6}\right]$ comprises a layered structure built up by non-condensed [WO6]${}^{6-}$ octahedra and ${\left[{\text{O}}_{4}{\text{Pb}}_{10}\right]}^{12+}$ oligomers. The compound was characterised by spectroscopic measurements (Infrared (IR), Raman and Ultraviolet–visible (UV/Vis) spectra) as well as quantum chemical and electrostatic calculations (density functional theory (DFT), MAPLE) yielding a band gap of 2.9 eV fitting well with the optical one of 2.8 eV. An estimation of the refractive index based on the Gladstone-Dale relationship yielded $n\approx 2.31$. Furthermore first results of the thermal analysis are presented.

Calcium Carbodiimide Compounds Revisited – Syntheses, Single Crystal Structure Determination and Vibrational Spectra of Ca11N6[CN2]2, Ca4N2[CN2] and Ca[CN2]

2008 ◽  
Vol 63 (5) ◽  
pp. 530-536 ◽  
Author(s):  
Olaf Reckeweg ◽  
Francis J. DiSalvo
Keyword(s):  
Crystal Structure ◽  
Raman Spectrum ◽  
Single Crystal ◽  
Single Crystals ◽  
Vibrational Spectra ◽  
Structure Determination ◽  
X Ray ◽  
Characteristic Features ◽  
Reported Data ◽  
Correct Data

Single crystals of Ca11N6[CN2]2 (dark red needles, tetragonal, P42/mnm (no. 136), a = 1456.22(5), and c = 361.86(2) pm, Z = 2), Ca4N2[CN2] (transparent yellow needles, orthorhombic, Pnma (no. 62), a = 1146.51(11), b = 358.33(4), and c = 1385.77(13) pm, Z = 4) and Ca[CN2] (transparent, colorless, triangular plates, rhombohedral, R3̅m (no. 166), a = 369.00(3), and c = 1477.5(3) pm, Z = 3) were obtained by the reaction of Na2[CN2], CaCl2 and Ca3N2 (if demanded by stoichiometry) in arc-welded Ta ampoules at temperatures between 1200 - 1400 K. Their crystal structures were re-determined by means of single crystal X-ray structure analyses. Additionally, the Raman spectra were recorded on these same single crystals, whereas the IR spectra were obtained with the KBr pellet technique. The title compounds exhibit characteristic features for carbodiimide units with D∞h symmetry (d(C-N) = 121.7 - 123.8 pm and ∡ (N-C-N) = 180°). The vibrational frequencies of these units are in the expected range (Ca11N6[CN2]2: νs = 1230, νs = 2008; δ = 673/645/624 cm−1; Ca4N2[CN2]: νs = 1230, νs = 1986; δ = 672/647 cm−1; Ca[CN2]: νs = 1274, νs = 2031, δ = 668 cm−1). The structural results are more precise than the previously reported data, and with the newly attained Raman spectrum of Ca11N6[CN2]2 we correct data reported earlier.

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