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

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.

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

Crystals ◽

10.3390/cryst10111013 ◽

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.

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ChemInform Abstract: THIOCHLOROARSENATES(III): PREPARATION, VIBRATIONAL SPECTRA, AND CRYSTAL STRUCTURES OF PPH4(AS2SCL5) AND (PPH4)2(AS2SCL6).C2H4CL2

Chemischer Informationsdienst ◽

10.1002/chin.198535036 ◽

1985 ◽

Vol 16 (35) ◽

Author(s):

A. T. MOHAMMED ◽

U. MUELLER

Keyword(s):

Crystal Structures ◽

Vibrational Spectra

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

Spectrochimica Acta Part A Molecular and Biomolecular Spectroscopy ◽

10.1016/j.saa.2019.117782 ◽

2020 ◽

Vol 228 ◽

pp. 117782 ◽

Cited By ~ 1

Author(s):

R.P. Sukiasyan ◽

K.Yu. Suponitsky ◽

A.K. Atanesyan ◽

A.A. Danghyan ◽

A.A. Hovhannisyan ◽

...

Keyword(s):

Crystal Structures ◽

Vibrational Spectra

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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

Zeitschrift für Naturforschung B ◽

10.1515/znb-2003-0704 ◽

2003 ◽

Vol 58 (7) ◽

pp. 620-626 ◽

Cited By ~ 13

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−.

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

Zeitschrift für Naturforschung B ◽

10.1515/znb-2002-1003 ◽

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.

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