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'Crystal Structure' in keywords Facet   section ZfN Section B:Volume 043  [X]
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1988 (51)
1Author    H.-Jürgen Meyer, Joachim PickardtRequires cookie*
 Title    Die Kristallstruktur von Calciumhexacyanoferrat(II)- Hexamethylentetramin-Wasser(l/l/6) Ca 2 [Fe(CN) 6 ] * C 6 H 12 N 4 * 6 H 2 0 The Crystal Structure of Calciumhexacyanoferrate(II)- Hexamethylenetetramine-Water(l/l/6) Ca 2 [Fe(CN) 6 ] * C 6 H 12 N 4 * 6 H : 0  
 Abstract    Ca 2 [Fe(CN) 6 ] • C t ,H 1 2N 4 -6H 2 0 crystallizes in the monoclinic space group B2lb with a = 1130,2(4), b = 1373,5(4), c = 1353,0(4) pm and y = 97,17°. The X-ray single crystal structure determination converged at R -0.055 (2057 reflections). Each of the four Fe(CN) 6 octahedra (Z = 4) in the unit cell is coordinated by six Ca atoms with mean N CY AN — Ca distances of 253.5(3) pm. The Ca atoms are bridged by hexamethylenetetramine and water molecules. 
  Reference    Z. Naturforsch. 43b, 135—137 (1988); eingegangen am 31. Juli 1987 
  Published    1988 
  Keywords    Crystal Structure, Hexacyanoferrate, Hexamethylenetetramine 
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 Identifier    ZNB-1988-43b-0135 
 Volume    43 
2Author    Walter Abriel, Hartmut EhrhardtRequires cookie*
 Title    Über hexakoordinierte gemischte Halogeno-Anionen des Te(IV): Kristallographische und Raman-spektroskopische Untersuchungen an Rb 2 TeBr 3 , 5 Cl 2 , 5 On Hexacoordinated Mixed Halogeno Anions of Te(IV): Crystallographic and Raman Spectroscopic Investigation of Rb 2 TeBr 3 5 C1 2 5  
 Abstract    The title compound contains the anions [TeBr 3 Cl 3 ] 2_ and [TeBr 4 Cl 2 ] 2_ in a 1:1 ratio. The corresponding point symmetries, detected by Raman spectroscopic methods, are 3 m and 4/mmm, respectively. The crystal structure analysis exhibits a random distribution of these anions: K 2 PtCl 6 -type, space group Fm3m with a = 10.4602(5) Ä and Z = 4, final R = 0.036 from 178 F n (MoKa). Einführung 
  Reference    Z. Naturforsch. 43b, 557—560 (1988); eingegangen am 7. Januar 1988 
  Published    1988 
  Keywords    Tellurates, Crystal Structure, Raman Spectra 
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 Identifier    ZNB-1988-43b-0557 
 Volume    43 
3Author    Gabi Reber, Jürgen Riede, Gerhard MüllerRequires cookie*
 Title    Molecular Structure of (o-Trimethylsilyl- benzyl)diphenylphosphine  
 Abstract    (o-Trimethylsilylbenzyl)diphenylphosphine (1) crystallizes in the monoclinic space group P2 Jn with a = 14.088(2), b = 8.712(1), c = 16.481(2)Ä, ß = 101.63(1)°, V -1981.3Ä\ Z = 4. There is no P-Si interaction in the solid state which is also found for the solution (31 P NMR, l3 C NMR). 
  Reference    Z. Naturforsch. 43b, 915—917 (1988); eingegangen am 18. März 1988 
  Published    1988 
  Keywords    Benzyl-phosphines, Conformation, Crystal Structure 
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 Identifier    ZNB-1988-43b-0915_n 
 Volume    43 
4Author    HerbertW. Roesky, Michael Zimmer, Regine Herbst, GeorgeM. Sheldrick, Prof Heinz, G. WagnerRequires cookie*
 Title    N,N'-Bis(diphenyIphosphino)-S,S-dimethylsulfodiimin — ein Ligand für cyclische Übergangsmetallkomplexe N,N'-Bis(diphenylphosphino)-S,S-dimethylsulfodiimine — a Ligand for Cyclic Transition Metal Complexes  
 Abstract    Me 2 SN 2 P 2 Ph 4 M(CO) 4 complexes (1) (M: la Cr, lb Mo, lc W) have been synthesized from Me 2 S(NPPh 2) 2 and C 7 H s M(CO) 4 . la—lc are stable at room temperature, lb crystallizes in the space group P2,2,2 with cell constants a = 2486.3(2); b = 1488.8(1); c = 882.0(1) pm. 
  Reference    Z. Naturforsch. 43b, 933—936 (1988); eingegangen am 26. Februar 1988 
  Published    1988 
  Keywords    Crystal Structure, Chromium, Molybdenum, Tungsten 
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 Identifier    ZNB-1988-43b-0933 
 Volume    43 
5Author    Siegfried Pohl, Rainer Lötz, Detlev Haase, Wolfgang SaakRequires cookie*
 Title    Iodoantimonate der Zusammensetzung A + Sb 2 I 7 : Diskrete Anionen in (Me 4 N) 4 Sb 8 I 2 8 und (Me 3 S) 4 Sb 8 I 28 , polymere Ketten in (Me 3 NCH 2 Ph)Sb 2 I 7 (Me = CH 3 , Ph = C 6 H 5 ) Iodoantimonates of Composition A~Sb 2 I 7 ~: Discrete Anions in (Me 4 N) 4 Sb 8 I 28 and (Me 3 S) 4 Sb s I 28 , Polymerie Chains in (Me 3 NCH 2 Ph)Sb 2 I 7 (Me = CH 3 , Ph -C 6 H 5 )  
 Abstract    The reaction of Sbl 3 with Me 4 NI, Me ? SI, and Me^NCH^Phl in acetonitrile (molar ratios 2:1) yields (Me 4 N) 4 Sb 8 I 28 (1). (Me,S) 4 Sb K I 28 (2). and (Me,NCH 2 Ph)Sb : I 7 (3), respectively. The struc-tures of 1—3 were determined from single crystal X-ray diffraction data. 1—3 crystallize in the monoclinic space group P2,/«. 2: a -1434.2(3). b -1484.1(4). c = 2102.6(4) pm. ß = 105.4(1)°, Z = 2. 1: a = 1441.7(1), b = 1545.1(1). c = 2117.3(1) pm. ß = 106.4(1)°, Z = 2. 3: a = 1004.4(1). b = 1378.8(1). c = 1899.3(2) pm. ß = 94.2(1)°. Z = 4. The structures of 1 and 2 are very similar and consist of isolated cations and anions. The Sb s I 28 
  Reference    Z. Naturforsch. 43b, 1144—1150 (1988); eingegangen am 24. Mai 1988 
  Published    1988 
  Keywords    Iodoantimonates, Synthesis, Crystal Structure 
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 Identifier    ZNB-1988-43b-1144 
 Volume    43 
6Author    CarlD. Habben, Mathias NoltemeyerRequires cookie*
 Title    Molekül-und Kristallstruktur  
 Abstract    des l,l-Diethyl-3,5-dimethyl-lA 6 ,4,2,6,3,5-dithiadiazadiborins Molecular and Crystal Structure of l,l-Diethyl-3,5-dimethyl-H 6 ,4,2,6,3,5-dithiadiazadiborine The title compound, isolated from the reaction of SS-diethyl-N,N'-bistrimethylsilylsulfodiimide and 3.5-dimethyl-l,2,4-trithiadiborolane, crystallizes in space group Pbca with cell constants a — 1218.7(6), b = 1295.8(6), c = 1455.7(9) pm, V = 2.2987 nm 3 , Z = 8, Q — 1.167 MgirT 3 . The X-ray structure was refined to R = 0.053. 
  Reference    Z. Naturforsch. 43b, 1683—1684 (1988); eingegangen am 11. August 1988 
  Published    1988 
  Keywords    Crystal Structure, Synthesis, Dithiadiazadiborines 
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 Identifier    ZNB-1988-43b-1683_n 
 Volume    43 
7Author    W. S. SheldrickRequires cookie*
 Title    Das kantenverknüpfte tritetraedrische Selenostannat(IV)-Anion [Sn 3 Se 8 ] 4 . Darstellung und Struktur von K 4 Sn 3 Se 8 The Edge-bridged Tritetrahedral Selenostannate(IV) Anion [Sn 3 Se 8 ] 4-. Preparation and Structure of K 4 Sn 3 Se 8  
 Abstract    The potassium selenostannate(IV) K4Sn3Ses has been prepared by methanolothermal reaction of K2C03 with elemental Sn and Se at 190 °C and its structure established by X-ray structural analysis. The unit cell contains isolated [Sn3Se8] 4-anions consisting of a central SnSe4-tetrahedron edge-bridged to two further tetrahedra. Crystallographic D2-symmetry is observed for these an-ions. The four-membered rings are markedly distorted with Sn —Se bond distances of 2.520(1) to the central tin atom as compared to long Sn-Se distances of 2.622(1) Ä to the tin atoms of the outer tetrahedra. The terminal Sn —Se bonds have a length of 2.473(1) Ä. 
  Reference    Z. Naturforsch. 43b, 249—252 (1988); eingegangen am 30. November 1987 
  Published    1988 
  Keywords    Potassium Selenostannate(IV), Methanolothermal Synthesis, Crystal Structure 
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 Identifier    ZNB-1988-43b-0249 
 Volume    43 
8Author    FranzA. Mautner, Harald Krischner, Christoph KratkyRequires cookie*
 Title    Darstellung und Kristallstruktur von Zinkazid * 4-Methylpyridin Preparation and Crystal Structure of Zinc Azide * 4-Methylpyridine  
 Abstract    Zinc azide • 4-methylpyridine (1) is formed by the reaction of zinc azide with the corresponding pyridine in aqueous solution. The crystal structure was determined by single crystal X-ray diffrac-tion methods. The crystals of 1 are monoclinic, space group C2/c, Z = 4, a = 1085.5(2), b = 1692.7(11), c = 619.7(6) pm, ß = 113.47(5)°. Each zinc atom is surrounded by five nitrogen atoms (four from azide groups and one from the pyridine adduct) in a distorted trigonal bipyramidal fashion. The ZnN5-polyhedra share common edges to form chains along the crystallographic c-axis. 
  Reference    Z. Naturforsch. 43b, 253—256 (1988); eingegangen am 22. Oktober/3. Dezember 1987 
  Published    1988 
  Keywords    Azide, Crystal Structure, 4-Methylpyridine, Pentacoordination, Zinc 
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 Identifier    ZNB-1988-43b-0253 
 Volume    43 
9Author    Christine Pues, Gerhard Baum, Werner Massa, Armin BerndtRequires cookie*
 Title    Struktur eines Homoborirens Structure of a Homoborirene  
 Abstract    Trapping of methyleneborane 7a with 3-hexine yields the stable 1,2-dihydroborete la. Strong folding (148.8°) along the 1,3-diagonal. the short 1.3-distance (191.5 pm), a lengthened 3,4-and a shortened 1,4-bond prove the homoborirene nature of la. 
  Reference    Z. Naturforsch. 43b, 275—279 (1988); eingegangen am 6. November/8. Dezember 1987 
  Published    1988 
  Keywords    Stable 1, 2-Dihydroborete, Crystal Structure 
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 Identifier    ZNB-1988-43b-0275 
 Volume    43 
10Author    Christoph KratkyRequires cookie*
 Title      
 Abstract    The crystal structure of Rb2Ca(N3)4-4H20 has been determined by single crystal X-ray methods. The compound is isotypic with K2Ca(N3)4-4H20 and crystallizes in the orthorhombic space group Ccca, Z = 4, a = 1949.1(12) pm, b = 1099.5(3) pm, c — 622.2(1) pm. 
  Reference    Z. Naturforsch. 43b, 497—498 (1988); eingegangen am 23. November 1987/14. Januar 1988 
  Published    1988 
  Keywords    Azide, Calcium, Crystal Structure, Hydrate, Rubidium 
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 Identifier    ZNB-1988-43b-0497_n 
 Volume    43 
11Author    Rupert MarxRequires cookie*
 Title    Darstellung und Kristallstruktur von Cäsiumhydroxid mit Methanol CsOH * CH 3 OH Properties and Crystal Structure of Cesium Hydroxide with Methanol CsOH * CH 3 OH  
 Abstract    Cesium hydroxide methanol, CsOHCH3OH, was obtained by recrystallising Cs0H H:0 in a mixture of liquid ammonia and methanol in sealed quartz ampoules. The colourless, air sensitive crystals are hexagonal (space group P63/m) with a = 1362 pm, c = 430 pm, Z = 6. A structural model derived by Patterson methods was refined to R = 0.033. The structure comprises of trigonal prismatic columns of Cs + and hydrogen bonded chains of OH^ and CH,OH along the c-axis. This leads to the tricapped prisms filled with Cs + and hydrophobic channels formed by the CH, groups. 
  Reference    Z. Naturforsch. 43b, 521—524 (1988); eingegangen am 14. Oktober/7. Dezember 1987 
  Published    1988 
  Keywords    Cesium Hydroxide Methanol, Synthesis, Crystal Structure 
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 Identifier    ZNB-1988-43b-0521 
 Volume    43 
12Author    Brigitte Eisenmann, Jürgen KleinRequires cookie*
 Title    Eine Zintl-Phase mit isolierten SnSb 4 8 -Anionen: Na 8 SnSb 4 A Zintl Phase with Isolated SnSb/ -Anions, Na 8 SnSb 4  
  Reference    (Z. Naturforsch. 43b, 69—71 [1988]; eingegangen am 10. September 1987) 
  Published    1988 
  Keywords    Crystal Structure, Semimetallic Anions, Zintl Phases 
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 Identifier    ZNB-1988-43b-0069 
 Volume    43 
13Author    Christian RoblRequires cookie*
 Title    Erdalkaliquadratate, VI [1] SrC 4 0 4 -3H 2 0, Typ III Alkaline-earth Squarates, VI [1] SrC 4 0 4 -3H 2 0, Type III  
 Abstract    SrC 4 0 4 -3H 2 0, type III, was obtained in an aqueous silica gel besides crystals of SrC 4 0 4 • 3 H 2 0, type I. X-ray crystal structure analysis showed close relationship to BaC 4 0 4 -3H 2 0, but no iso-typism. Sr 2+ is coordinated by four water molecules and four oxygen atoms of the squarate dianion. The connection of Sr 2+ with C 4 0 4 2 leads to layers. The geometry of C 4 0 4 2 is typical for delocalized jr-systems. The O squarate atoms are not equally bound to Sr 2+ . One O squarate atom (0(4)) is bound to two Sr 2+ , two (O(l), 0(2)) are bound to one Sr 2+ , respectively, and the fourth O squaraIe atom (0(3)) shows no bonding contact to Sr 2+ . These differences are compensated for by inter-molecular hydrogen bonds which involve 0(3) three times, O(l) and 0(2) once each, but not 0(4). 
  Reference    (Z. Naturforsch. 43b, 99—103 [1988]; eingegangen am 21. September 1987) 
  Published    1988 
  Keywords    Strontium Squarate Type III, Preparation, Crystal Structure, Hydrogen Bonding 
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 Identifier    ZNB-1988-43b-0099 
 Volume    43 
14Author    Eberhard Böhm, Kurt Dehnicke, Johannes Beck, Wolfgang Hiller, Joachim Strähle, Andreas Maurer, Dieter FenskeRequires cookie*
 Title    Die Kristallstrukturen von Ph 3 PNPh, [Ph 3 PN(H)Ph][AuI 2 ] und von 2,3-Bis(triphenylphosphoranimino)maIeinsäure-N-methyIimid The Crystal Structures of Ph 3 PNPh, [Ph 3 PN(H)Ph][AuI 2 ] and of 2,3-Bis(triphenylphosphoranimino)maleic Acid-N-methylimide  
 Abstract    [Ph 3 PN(H)Ph][AuI 2 ] (2) is formed by the reaction of Aul with N-Phenyl-iminotriphenylphos-phorane, Ph 3 PNPh in a toluene suspension. 2,3-Bis(triphenylphosphinimino)maleic acid-N-methylimide (3) has been prepared by the Staudinger reaction of 2,3-bis(azido)maleic acid-N-methylimide with PPh, in THF solution in the form of red crystals. Crystal structure determina-tions of three iminophosphoranes were carried out by X-ray methods. Ph 3 PNPh (1): space group P2]/c, Z = 4, 2176 independent observed reflexions, R = 0.057. Lattice dimensions (-30 °C): a = 1126.4, b = 1148.6, c = 1476.0 pm; ß = 97.21°. The compound forms monomeric molecules with P=N = 160.2 pm and an PNC angle of 130.4°. [Ph 3 PN(H)Ph][AuP] (2): space group PI, Z = 2, 1780 independent observed reflexions, R = 0.057. Lattice dimensions (18 °C); a = 824.9, b = 1022, c = 1476.2 pm; a = 89.23°, ß = 87.41°, y = 85.65°. The compound consists of ions [Ph 3 PN(H)Ph]® with P=N = 162.4 pm and PNC = 129.3°, and anions [Aul 2 ] e with Au-I = 261.9 and 259.3 pm, IAuI = 176.8°. (PhiP) 2 N-,C 4 0 2 (NMe) (3): space group PI, Z = 2, 4972 independent observed reflexions, R = 0.050. Lattice dimensions (-90 °C): a = 904.7, b = 993.8, c = 2017.4 pm; a = 101.55°, ß = 96.39°, y — 105.81°. The compound forms monomeric molecules with ^«-conformation of the two NPPh 3 groups. Bond lengths: P=N = 157.1; 155.3 pm, bond angles: PNC = 133°; 136°. 
  Reference    Z. Naturforsch. 43b, 138—144 (1988); eingegangen am 2. September/6. November 1987 
  Published    1988 
  Keywords    Iminophosphoranes, Synthesis, IR Spectra, Crystal Structure 
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 Identifier    ZNB-1988-43b-0138 
 Volume    43 
15Author    Karl-Friedrich Tebbe, Norbert KraußRequires cookie*
 Title    Untersuchungen an Polypseudohalogeniden, V[l] Darstellung und Kristallstruktur des Kaliumdicyanoiodats(I), K[I(CN) 2 ] Studies on the Polypseudohalides, V [1] Preparation and Crystal Structure of K[I(CN) 2 ]  
 Abstract    The new compound K[I(CN) 2 ] can be prepared by addition of one formula unit of iodine to a concentrated aqueous solution of two mole equivalents of potassium cyanide. It crystallizes in the monoclinic space group C2Im with a = 736.4, b = 451.4, c = 908.0 pm.ß = 92.56° and Z = 2. The crystal structure has been refined to R f = 0.020 for 301 observed reflections. The structure may be described as a layer-like package of cations K + and trihalide-analogous anions [I(CN) 2 ]~. The anions are strictly linear at the I atoms (symmetry 2/m) and nearly linear at the C atoms with <p(I-C-N) = 178.6° and d(I-C) = 229.8, d(C-N) = 112.9 pm. The cation is surrounded by a slightly distorted octahedron of nitrogen atoms with d(K---N) = 284.8,292.6 pm. 
  Reference    Z. Naturforsch. 43b, 149—152 (1988); eingegangen am 27. Mai/26. Oktober 1987 
  Published    1988 
  Keywords    gewidmet Potassiumdicyanoiodate, Cyanogen Compound, Polypseudohalide, Pseudotrihalide, Crystal Structure 
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 Identifier    ZNB-1988-43b-0149 
 Volume    43 
16Author    Peter Stolz, Siegfried PohlRequires cookie*
 Title    Iodomanganate(II): Darstellung und Kristallstrukturen von (Ph 4 P)MnI 3 L, MnI 2 L 3 , [MnIL 5 ]I 3 und [MnL 6 ](I 3 ) 2 (L = Tetrahydrofuran) Iodomanganates(II): Synthesis and Crystal Structures of (Ph 4 P)MnI 3 L, MnI 2 L 3 , [MnIL 5 ]I 3 and [MnL 6 ](I 3 ) 2  
 Abstract    The compounds (Ph 4 P)MnI 3 L (1), MnI 2 L 3 (2), [MnIL 5 ]I 3 (3), and [MnL A ](I 3) 2 (4) (L = C 4 H H O, thf) were prepared in thf solution and their structures determined from single crystal X-ray diffraction data. 1 crystallizes in the monoclinic space group C2/c with a = 1743.6(1), b — 1985.8(1), c = 1806.7(1) pm, ß = 98.74(1)°, Z = 8. The structure of 1 exhibits tetrahedral anions. The Mn—I distance was found to be 268.0 pm (mean). 2: monoclinic, C2/c with a = 1252.3(2), b = 1255.0(3), c = 1271.8(3) pm ß = 113.88(2)°, Z = 4. The characteristic feature of the structure of 2 is the existence of neutral MnI 2 L 3 molecules with a distorted trigonal bipyramidal geometry and the iodine atoms in equatorial positions (Mn —I: 271.1 pm). The compound crystallizes from a solution of Mnl 2 in tetrahydrofuran. 3: monoclinic, C2/c with a = 1695.3(1), b = 1123.1(1), c = 1646.2(1) pm, ß = 96.91(1)°, Z = 4. The preparation of 3 from 2 and iodine yields octahedral MnIL, + cations (Mn —I: 278.8 pm) and triiodide anions. 4: monoclinic, P2,//z with a = 1005.5(1). b = 1056.8(1), c -1835.6(2) pm, ß = 91.16(1)°, Z -2. 4 is prepared from 3 and iodine in thf solution, and shows octahedral MnL 6 2+ cations and triiodide anions. 
  Reference    Z. Naturforsch. 43b, 175—181 (1988); eingegangen am 19. August/20. Oktober 1987 
  Published    1988 
  Keywords    Iodo-Complexes of Manganese(II), Synthesis, Crystal Structure 
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 Identifier    ZNB-1988-43b-0175 
 Volume    43 
17Author    Na, Cufef, S. Kummer, W. Massa, D. BabelRequires cookie*
 Title    Zur Struktur der Kupfer-Weberite Na 2 CuCrF 7 Concerning the Structures of the Copper Weberites Na 2 CuCrF 7 and Na 2 CuFeF 7  
 Abstract    The crystal structure of the compound Na 2 CuCrF 7 (orthorhombic, a = 710.0, b = 1033.8, c = 751.8 pm, Z = 4) was refined in space group Pmnb to R (= 0.028 (1545 independent reflections). The Jahn-Teller distortion of the CuF 6 -octahedra (Cu-F = 191.1/193.8/212.4 pm. mean 199.1 pm) reduces the symmetry compared to the body-centered orthorhombic weberite type, to which it is otherwise closely related. The CrF 6 -octahedra. interconnecting parallel chains of CuF 6 -octahedra, are nearly undistorted (mean Cr-F = 190.6 pm). Na 2 CuFeF 7 exhibits a supercell with a different structure (monoclinic, a = 2468.7, b = 734.7, c = 1245.2 pm, ß = 99.29°, Z = 16). It may be interpreted as a new intermediate type between orthorhombic and trigonal weberites. Preliminary results obtained from refinement in space group A2/n (/? g = 0.076) are given and discussed (mean values Cu—F = 199 pm, Fe — F = 192 pm). 
  Reference    Z. Naturforsch. 43b, 694—701 (1988); eingegangen am 9. Februar 1988 
  Published    1988 
  Keywords    Crystal Structure, Weberite, Copper Fluoro Compounds 
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 Identifier    ZNB-1988-43b-0694 
 Volume    43 
18Author    Ute Patt-Siebel, Helmut Thullen, Ulrich Müller, Kurt DehnickeRequires cookie*
 Title    Dichlorcyclopropenon als stabiler Komplexligand Die Kristallstruktur von [NbOCl 3 -OC 3 Cl 2 ] 4 Dichlorocyclopropenone as Stable Complex Ligand The Crystal Structure of [NbOCI 3 * OC 3 Cl 2 ] 4  
 Abstract    The reaction of tetrachlorocyclopropene with NbOCl, yields NbCl 5 • OC 3 Cl 2 (1); 1 is also formed by partial hydrolysis of C 3 Cl 3 + NbCl 6 ~ (2), which is prepared from C 3 C1 4 and NbCl s . [NbOCl 3 • OC 3 Cl : ] 4 (3) was obtained by hydrolysis of 1 in form of pale-yellow, moisture sensitive, non-explosive crystals, and characterized by its IR spectrum and an X-ray crystal structure deter-mination (1871 independent observed reflexions, R = 0.048). Crystal data: space group P 1. Z = 2. a = 993.7(4), b = 1090.5(5). c = 1097.4(3) pm, a = 69.51(3), ß = 70.47(3), y = 66.51(4)° (at — 17 °C). 3 consists of centrosymmetrical tetramers; the four Nb atoms form a square and are linked via almost linear oxo groups with alternating short and long NbO bonds with mean bond lengths of 175 and 208 pm. In trans position of each of the short NbO bonds a dichlorocyclo-propenone molecule is attached via its oxygen atom with an NbO distance of 223 pm. 
  Reference    Z. Naturforsch. 43b, 795—800 (1988); eingegangen am 10. Februar 1988 
  Published    1988 
  Keywords    Dichlorocyclopropenone-NbOCb Adduct, Synthesis IR Spectra, Crystal Structure 
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 Identifier    ZNB-1988-43b-0795 
 Volume    43 
19Author    PeterG. Jones, Ralf Scheibach, Einhard Schwarzmann, Carsten Thöne, Andreas VielmäderRequires cookie*
 Title    Darstellung und Kristallstruktur einiger Tetracarboxylatoaurate(III) Preparation and Crystal Structure of Some Tetracarboxylatoaurates(III)  
 Abstract    Various salts M(AuX 4) 2 with X = OCOCH, or OCOC 2 H 5 have been prepared by two methods: (i) the reaction of metal hydroxides M(OH) 2 with HAuCl 4 , followed by treatment of the inter-mediate products with acetic or propionic acid, or (ii) the reaction of aurates M{Au(OH) 4 } 2 with the carboxylic acids. The crystal structure of Pb{Au(0C0CH 3) 4 } 2 -2H 2 0 shows that it is isostruc-tural to the strontium salt, consisting of molecular units Pb{Au(OCOCH 3) 4 } 2 with crystallo-graphic symmetry 2. The water of crystallization forms neither coordinate bonds to a metal nor hydrogen bonds. In the analogous zinc salt the water is coordinated to the zinc atom, and the structure is a layer polymer. The two compounds that crystallize in anhydrous form. Ba{Au(OCOCH 3) 4 } 2 and Pb{Au(OCOC 2 H s) 4 } 2 , have not yet yielded crystals suitable for X-ray analysis. 
  Reference    Z. Naturforsch. 43b, 807—812 (1988); eingegangen am 3. März 1988 
  Published    1988 
  Keywords    Gold, Carboxylate, Alkaline Earths, Crystal Structure 
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 Identifier    ZNB-1988-43b-0807 
 Volume    43 
20Author    Wolfgang Saak, Siegfried PohlRequires cookie*
 Title      
 Abstract    Fe 4 S 4 I 2 (SPPh 3) 2 (1) was prepared by the reaction of Fe(THF) 6 Fe 4 S 4 I 4 (THF = C 4 H 8 0). SPPh,. and sulfur in toluene and CH 2 C1 2 . 1 has a lower stability than Fe 4 S 4 I 4 2_ and decomposes in solvents like THF and CH,CN. The crystal structure of 1 was determined from single crystal X-ray diffraction data. The compound crystallizes in the triclinic space group PI with a = 1025.5(1). b = 1082.4(1), c = 2135.5(3) pm. a = 89.82(1).ß -77.37(1), y = 73.56(1)°. V = 2214.1x10" pm'and Z = 2. The [Fe 4 S 4 ] 2+ core of 1 exhibits a slight tetragonal distortion. The mean Fe —S and Fe —Fe distances were found to be 227.6 (225.8-228.7) pm and 273.3 (272.9-274.4) pm, respectively. The Fe-SPPh, distances (231.6 and 232.1 pm) are longer than the terminal Fe — S bonds in RS coordinated [Fe 4 S 4 ] clusters. The Fe —I bonds are found at 251.6 and 251.8 pm. respectively. 
  Reference    Z. Naturforsch. 43b, 813—817 (1988); eingegangen am 15. Februar 1988 
  Published    1988 
  Keywords    Neutral, Mixed Terminal Ligand Iron-Sulfur Cluster, Synthesis, Crystal Structure 
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 Identifier    ZNB-1988-43b-0813 
 Volume    43 
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