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1Author    D. BabelRequires cookie*
 Title    Die Kristallstruktur des Cyano-Elpasoliths [N(CH3)4]2CsFe(CN)6 The Crystal Structure of the Cyano Elpasolite [N(CH3)4]2CsFe(CN)6  
 Abstract    The crystal structure of the cubic compound [N(CH3)4]2CsFe(CN)6 was determined by X-ray methods: a = 2527.4(6) pm, space group Fd3c, Z = 32, Rg = 0.028 (260 independent single crystal reflections). The resulting distances within the practically undistorted Fe (CN) 6 3 ~ -octahedron are Fe-C = 193.4(6) and C-N = 115.7(7) pm. Compared to the ideal elpasolite structure of space group Fm3m, Z = 4, the octahedra are rotated by 7.4° through their 3 axis. This is discussed as caused by steric requirements of the tetramethyl-ammonium groups (N-C = 148.4(10) and 149.1(38) pm, resp.). Three quarters of them, of which also the hydrogen positions could bo located, are well oriented. The remaining quarter shows orientational disorder to approach similar contact distances as the other N(CH3)4+ ion exhibits between the methyl groups and the nitrogen ends of the anions. 
  Reference    Z. Naturforsch. 37b, 1534—1539 (1982); eingegangen am 11. August 1982 
  Published    1982 
  Keywords    Crystal Structure, Elpasolite, Hexacyanoferrate(III) 
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 TEI-XML for    default:Reihe_B/37/ZNB-1982-37b-1534.pdf 
 Identifier    ZNB-1982-37b-1534 
 Volume    37 
2Author    M. Witzei, D. BabelRequires cookie*
 Title    Die Kristallstruktur des elpasolith-verwandten Cyanokomplexes [N(CH3)4]2NaFe(CN)6 * H20 The Crystal Structure of the Elpasolite-Related Cyano Complex [N(CH3)4]2NaFe(CN)6 * H20  
 Abstract    The compound [N(CH3)4]2NaFe(CN)6 • H20 crystallizes in the orthorhombic space group Pnma, Z = 4, a — 1863.9(2), b = 861.7(1), c — 1317.2(2) pm. The X-ray single crystal structure determination (2515 reflections, R — 0.04) revealed an elpasolite-related framework of slightly deformed Fe(CN)63_ octahedra, the mean distances in which are Fe —C = 194.0 and C—N = 113.9 pm. The strongly distorted octahedral N6 cavities formed by six Fe(CN)63_ units are occupied by monohydrated sodium ions, exhibiting a very short distance N a—O = 221.8(3) pm. By approach to one of the octahedral faces within their N6 environment the sodium ions obtain a distorted tetrahedral NaON3 coordination, N a—N = 2 x 238.0(3) and 241.3(3) pm. One of the compound's two tetramethylammonium ions, which are centered at mirror planes, is orientation-ally disordered. The reason for this is discussed. 
  Reference    Z. Naturforsch. 39b, 201 (1984); eingegangen am 21. Juli/19. Oktober 1983 
  Published    1984 
  Keywords    Crystal Structure, Elpasolite, Hexacyanoferrate(III), Monohydrated Sodium Ion 
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 TEI-XML for    default:Reihe_B/39/ZNB-1984-39b-0201.pdf 
 Identifier    ZNB-1984-39b-0201 
 Volume    39 
3Author    Stefan Peschel, Dietrich BabelRequires cookie*
 Title    Zur Kristallstruktur der Cyanoelpasolithe [N(CH3)4]2CsCo(CN)6 und [H3NCH3]2NaFe(CN)6 Concerning the Crystal Structures of the Cyano-Elpasolites [N(CH3 )4]2CsCo(CN) 6 and [H3NCH3]2NaFe(CN) 6  
 Abstract    Single crystals of the cyano com plexes [N (C H 3)4]2C sC o(C N)6 and [H3NCH 3]2N aFe(C N)6 were prepared and their structures determined by X-ray methods. The cobalt compound is monoclinic, a -885.5(1), b = 892.6(2), c = 1259.9(5) pm, ß = 90.29(4)°, space group 12Im, Z = 2; R l = 0.048 for 861 independent reflections. The resulting average distances in the nearly undistorted octahedra are C o -C = 189.8, C -N = 114.1, C s -N = 325.6 pm. The iron compound exhibits a cubic elpasolite type structure, a = 1105.2(1) pm, space group Fm 3m , Z = 4; R l = 0.040 for 127 independent reflections; F e -C = 193.4(6), N a -N = 247.7(8) pm. The orientation of the librating tetramethyl-ammonium group within the cages of the cobalt compound and the disorder of the monomethyl-ammonium cation around the special site (1/4, 1/4, 1/4) of the iron complex are discussed. 
  Reference    Z. Naturforsch. 49b, 1373—1380 (1994); eingegangen am 31. März 1994 
  Published    1994 
  Keywords    Hexacyanometallates(III), Crystal Structure, Elpasolite 
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 TEI-XML for    default:Reihe_B/49/ZNB-1994-49b-1373.pdf 
 Identifier    ZNB-1994-49b-1373 
 Volume    49