Synthesis, Crystal Structures, and Vibrational Spectra of Novel Azidopalladates of the Alkali Metals Cs2[Pd(N3)4] and Rb2[Pd(N3)4]·2/3H2O 

2010 ◽  
Vol 636 (7) ◽  
pp. 1301-1306 ◽  
Author(s):  
Semih Afyon ◽  
Peter Höhn ◽  
Mehmet Somer
Keyword(s):  
Crystal Structures ◽  
Vibrational Spectra ◽  
Alkali Metals

Verbindungen mit SiS2-isosteren Anionen ∞1[AlX4/23-] und ∞1[InP4/23-]: Synthesen, Kristallstrukturen und Schwingungsspektren von Na3[AlX2], K2Na[AlX2] und K3[InP2] (X = P, As) / Compounds with SiS2 Isoelectronic Anions ∞1[AlX4/23-] and ∞1[InP4/23-]: Synthesis, Crystal Structures and Vibrational Spectra of Na3[AlX2], K2Na[AlX2] and K3[InP2] (X = P, As)

1993 ◽  
Vol 48 (8) ◽  
pp. 1027-1034 ◽  
Author(s):  
Lothar Ohse ◽  
Mehmet Somer ◽  
Wolfgang Blase ◽  
Gerhard Cordier
Keyword(s):  
Crystal Structures ◽  
Vibrational Spectra ◽  
Alkali Metals ◽  
Normal Coordinate Analysis ◽  
Polymeric Chain ◽  
Normal Coordinate ◽  
Fragment Method

The title compounds were prepared from stoichiometric mixtures of the elements or from alkali metals (Na, K), NaX (KX) and MX (M = Al, In; X = P, As) at 1000 K. The crystal structures (Ibam, No. 72) are characterized by infinite chains of edge sharing tetrahedra ∞1[MX4/23-] (M = Al, In; X = P, As) which are isoelectronic to SiS2.The vibrational spectra can be interpreted with respect to the symmetry P(2/m 2/c) 42/m–D4h of the isolated polymeric chain ∞1[MX4/23-]. The assignment of the observed frequencies is supported by a normal coordinate analysis using the fragment method.

scholarly journals Spotlight on Alkali Metals: The Structural Chemistry of Alkali Metal Thallides

Crystals ◽  
2020 ◽  
Vol 10 (11) ◽  
pp. 1013
Author(s):  
Stefanie Gärtner
Keyword(s):  
Crystal Structure ◽  
Alkali Metal ◽  
Crystal Structures ◽  
Alkali Metals ◽  
Valence Electron ◽  
Oxidation States ◽  
Valence Electron Concentration ◽  
Base Metals ◽  
Charge Balancing

Alkali metal thallides go back to the investigative works of Eduard Zintl about base metals in negative oxidation states. In 1932, he described the crystal structure of NaTl as the first representative for this class of compounds. Since then, a bunch of versatile crystal structures has been reported for thallium as electronegative element in intermetallic solid state compounds. For combinations of thallium with alkali metals as electropositive counterparts, a broad range of different unique structure types has been observed. Interestingly, various thallium substructures at the same or very similar valence electron concentration (VEC) are obtained. This in return emphasizes that the role of the alkali metals on structure formation goes far beyond ancillary filling atoms, which are present only due to charge balancing reasons. In this review, the alkali metals are in focus and the local surroundings of the latter are discussed in terms of their crystallographic sites in the corresponding crystal structures.

Crystal structures and vibrational spectra of L-argininium(2+) bis(tetrafluoroborate) and L-argininium(2+) bis(perchlorate)

2020 ◽  
Vol 228 ◽  
pp. 117782 ◽  
Author(s):  
R.P. Sukiasyan ◽  
K.Yu. Suponitsky ◽  
A.K. Atanesyan ◽  
A.A. Danghyan ◽  
A.A. Hovhannisyan ◽  
...  
Keyword(s):  
Crystal Structures ◽  
Vibrational Spectra

Die neuen Oxoarsenate(III) AAsO2 (A = Na, K, Rb) und Cs3As5O9. Darstellung, Kristallstrukturen und Raman-Spektren / The New Oxoarsenates(III) AAsO2 (A = Na, K, Rb) and Cs3As5O9. Synthesis, Crystal Structures and Raman Spectra

2003 ◽  
Vol 58 (7) ◽  
pp. 620-626 ◽  
Author(s):  
Franziska Emmerling ◽  
Caroline Röhr
Keyword(s):  
Crystal Structures ◽  
Metal Content ◽  
Alkali Metals ◽  
Alkaline Metal ◽  
Tetrahedral Coordination ◽  
X Ray Diffraction ◽  
Orthorhombic Space Group ◽  
Space Group ◽  
X Ray ◽  
Metal Arsenates

The new alkaline metal arsenates(III) were synthesized at a temperature of 500 °C via reaction of stoichiometric mixtures of the elemental alkali metals A and As2O3. In the crystal structures of the four title compounds, which have been determined by single crystal x-ray diffraction, the As(III) atoms are in ψ-tetrahedral coordination by oxygen exclusively. In NaAsO2 (orthorhombic, space group Pbcm, a = 1429.6(9), b = 677.3(3), c = 509.1(2) pm, Z = 8) and the compounds AAsO2 (A = K/Rb, orthorhombic, space group Pbcm, a = 715.1(2)/729.7(5), b =748.0(1)/775.2(5), c = 539.20(17)/541.1(3) pm, Z = 4) the AsO3 ψ-tetrahedra are condensed to form zig-zag chains [AsOO2/2]−. In the Cs phase Cs3As5O9 with a lower alkaline metal content (trigonal, space group P31m, a = 845.5(3), c = 602.6(2) pm, Z = 1) the two crystallographically independent ψ-tetrahedra AsO3/2 and AsOO2/2 are connected in a 2:3 ratio to give polar sheets [As5O9]3−.

Die neuen Oxobismutate(III) Cs6Bi4O9, K9Bi5O13 und A2Bi4O7 (A = Rb, Cs) / The New Oxobismutates(III) Cs6Bi4O9, K9Bi5O13 and A2Bi4O7 (A = Rb, Cs)

2002 ◽  
Vol 57 (10) ◽  
pp. 1090-1100
Author(s):  
Franziska Emmerling ◽  
Caroline Röhr
Keyword(s):  
Single Crystal ◽  
Crystal Structures ◽  
Alkali Metals ◽  
Mixed Valence ◽  
Three Dimensional ◽  
X Ray Diffraction ◽  
X Ray ◽  
Trigonal Bipyramidal ◽  
Mixed Valence Compound

AbstractThe title compounds were synthesized at a temperature of 700 °C via oxidation of elemental Bi with the hyperoxides AO2 or via reaction of the elemental alkali metals A with Bi2O3. Their crystal structures have been determined by single crystal x-ray diffraction. They are dominated by two possible surroundings of Bi by O, the ψ-trigonal-bipyramidal three (B) and the ψ-tetrahedral four (T) coordination. Cs6Bi4O9 (triclinic, spacegroup P1̄, a = 813.82(12), b = 991.60(14), c = 1213.83(18) pm, α = 103.658(2), β = 93.694(3), γ = 91.662(3)°, Z = 2) contains centrosymmetric chain segmentes [Bi8O18]12- with six three- (T) and two four-coordinated (B) Bi(III) centers. K9Bi5O13 (monoclinic, spacegroup P21/c, a = 1510.98(14), b = 567.59(5), c = 2685.6(2) pm, β = 111.190(2)°, Z = 4) is a mixed valence compound with isolated [BivO4]3- tetrahedra and chains [BiIII4O9]6- of two T and two B coordinated Bi. In the compounds A2Bi4O7 (A = Rb/Cs: monoclinic, C2/c, a = 2037.0(3) / 2130.6(12), b = 1285.5(2) / 1301.9(7), c = 1566.6(2) / 1605.6(9) pm, β = 94.783(3) / 95.725(9)°, Z = 8) ribbons [Bi4O6O2/2]2- are formed, which are condensed to form a three-dimensional framework.

Mg2[BN2]Cl and Mg8[BN2]5I: Novel Magnesium Nitridoborate Halides — Syntheses, Crystal Structures, and Vibrational Spectra.

ChemInform ◽  
2004 ◽  
Vol 35 (38) ◽  
Author(s):  
Mehmet Somer ◽  
Mehmet Nuri Kuetuekcue ◽  
Raul Cardoso Gil ◽  
Horst Borrmann ◽  
Wilder Carrillo-Cabrera
Keyword(s):  
Crystal Structures ◽  
Vibrational Spectra
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