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1995[X]
21Author    Uwe Rosenthal, Siegmar Pulst, PerditaA. Rndt, Wolfgang Baumann, Annegret Tillack, R. Hett KempeRequires cookie*
 Title    Zum Ligandeinfluß in neuen Ni(0)-Komplexen disubstituierter Butadiine On the Influence of Ligands in New Ni(0) Complexes of D isubstituted Butadiynes  
 Abstract    It has been shown that disubstituted butadiynes react with L2Ni(C2H 4) to yield m ono­ nuclear complexes L2Ni(?/2(l:2)-R C = C -C = C R) (L = o-T ol-0)3P, R = SiMe3 (1), 'Bu (2), Ph (3)). For the first time, the crystal structure of a nickel(O) alkyne complex carrying phosphite ligands (2) has been determined. The reaction of (dipy)Ni(cod) (L2 = dipy) with butadiynes R 'C = C -C = C R is strongly influenced by the substituents of the butadiyne. With R' = R = SiMe3 (4), 'Bu (5) and Ph (6) or R' = Ph, R = SiMe3 (7) and R ' = 'Bu, R = SiMe3 (8) mononuclear complexes (dipy)Ni(?72(l:2)-R 'C = C -C = C R) have been observed. Depending on the stoichiometry with R = R ' = Ph (9) and 'Bu (10) dinuclear complexes |(dipy)Ni}2(/<-?72(l:2),?72(3 :4)-R 'C = C -C = C R) having two Ni atoms coordinated to two C = C triple bonds were obtained. By contrast, with R ' = R = SiMe3 (11), R' = 'Bu, R = SiMe3 (12) and R' = Ph, R = SiMe3 (13) the two Ni-centers were found to coordinate to the same C = C triple bond to yield another type of a dinuclear complex {(dipy)Ni}2(w-?72(l:2),//2(l:2)-R 'C = C -C = C R). Com pound 5 has been characterized by X-ray crystal structure analysis. The structures of 2 and 5 are com pared to that of the well-known complex (Ph3P)2Ni(?72(l:2)-'B u C = C -C = C 'B u) [1] to study the influence of different ligands L on the structural details. In comparison to the alkyne complexes L2Ni(//2-R C = C R) in butadiyne complexes of the L2Ni(//2(l:2)-R 'C = C -C = C R) type there is only a slight effect of the different ligands. The uncomplexed C = C triple bond as a part of the second substi­ tuent in conjugation to the complexed C = C triple bond appears to level out the influence of ligands and substituents. 
  Reference    Z. Naturforsch. 50b, 368—376 (1995); eingegangen am 4. O ktober 1994 
  Published    1995 
  Keywords    Butadiyne, Phosphite, Dipyridyl, Crystal Structure, Nickel(O) Complexes 
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 Identifier    ZNB-1995-50b-0368 
 Volume    50 
22Author    S. Frenzen, Hk Müller-BuschbaumRequires cookie*
 Title    Uber das gemischte Alkali-Erdalkalimetall-Oxoruthenat NaSr3R u 0 6 The Mixed Alkaline Alkaline E arth O xoruthenate NaSr3R u 0 6  
 Abstract    Single crystals of NaSr3R u 0 6 have been prepared in closed silver tubes and investigated by X-ray techniques^ This compound crystallizes with trigonal (rhombohedral) symmetry, space group Ö3d-R 3 c , a = 9.6069(8), c = 11.513(2) A, Z = 6, and is isotypic to compounds of the Sr4P t 0 6 type. The crystal structure is discussed with respect to related compounds with partial replacement o f alkaline earth elem ents by sodium and copper. 
  Reference    Z. Naturforsch. 50b, 581 (1995); eingegangen am 4. Oktober 1994 
  Published    1995 
  Keywords    Sodium, Strontium, Ruthenium, Oxide, Crystal Structure 
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 Identifier    ZNB-1995-50b-0581 
 Volume    50 
23Author    Verena Schultz-Coulon, Wolfgang SchnickRequires cookie*
 Title    C a M g 2N 2 -ein gemischtes Erdalkalimetallnitrid mit fl#if/-La20 3-Struktur CaMg2N 2 -a Mixed Alkaline-Earth Metal Nitride with anti-La20 3 Structure  
 Abstract    CaMg2N 2 (trigonal, P 3 m l (Nr. 164); a = 354.046(1), c = 609.079(2) pm; Z = 1) is isotypic to the anti-La20 3 structure with octahedral and tetrahedral coordination for Ca2+ and M g2+ ions, respectively. The compound has been prepared by the reaction o f the binary nitrides Ca3N 2 and M g3N 2 (molar ratio 1:2) in a tungsten crucible under a pure nitrogen atmosphere at 1050 °C. The formation o f the solid CaM g2N 2 may be interpreted in analogy to reactions o f related oxides as an acid-base reaction between the binary nitrides with different coordina­ tion tendencies o f Ca2+ and M g2+ ions. A n analysis o f the binary aristotype anti-La20 3 indica­ tes that this structure is predisposed for building ternary phases. 
  Reference    Z. Naturforsch. 50b, 619—622 (1995); eingegangen am 31. August 1994 
  Published    1995 
  Keywords    Alkaline-Earth Metal Nitrides, Preparation, Crystal Structure, Structural Relations 
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 TEI-XML for    default:Reihe_B/50/ZNB-1995-50b-0619.pdf 
 Identifier    ZNB-1995-50b-0619 
 Volume    50 
24Author    JanKarsten Schaefer, BluhmRequires cookie*
 Title     
 Abstract    uT m 2[ B 20 5] 2: D as erste "M etaborat" mit einem x [ B 20 5] 4 -Anion CuTm2[B20 5]2: The First " Metaborate" with a ^ [ B ^ s ] 4 -Anion Single crystals o f the compound CuTm2[B 20 3]2 were obtained by a B20 3 flux technique. The compound contains a hitherto unknown metaborate anion with the formula ^ [ ^ O s ] 4-. It crystallizes in the monoclinic space group C|h-P2!/c with a = 452.18(7); b = 720.0(2); c = 929.2(5) pm; ß -90.16(5)°; Z = 2. The metaborate layers consists of four and eight membered rings of edge-sharing B 0 4-tetrahedra resembling the complex anion in the isotypic gadolinite structure of F e Y 2[B eS i0 3]2. The layers are connected via copper-centered elongated oxygen octahedra and slightly distorted thulium-centered tetragonal oxygen antiprisms. 
  Reference    Z. Naturforsch. 50b, 630—634 (1995); eingegangen am 2. August/11. November 1994 
  Published    1995 
  Keywords    Copper, Thulium, Borate, Synthesis, Crystal Structure 
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 TEI-XML for    default:Reihe_B/50/ZNB-1995-50b-0630.pdf 
 Identifier    ZNB-1995-50b-0630 
 Volume    50 
25Author    NewN., Si, Lothar Marcus, Uwe Klingebiel, Mathias Noltemeyer+, Chme2Requires cookie*
 Title    Neue N,Si,0,C-Heteraphane - Synthese eines 16-gliedrigen Makrocyclus of a 16-Membered Macrocycle NoF H-N Me2H C -S i Me2HC  
 Abstract    Bis(fluorodiisopropylsiiyi)amine [(Me2H C)2SiF]2NH (1) reacts with the disodium salt of catechole or the disodium salt of resorcinol in a molar ratio 1:1 to give the seven-membered heteraphane [HN(Me2H C)2SiO]2C6H4 (2) resp. the 16-membered heteraphane [HN(Me2H C)2SiOC6H4O Si(CHM e2)2]2 (3). The chain-like compound [(Me2H C)2SiFNHSi(CHMe2)20 ] 2C6H4 (4) is obtained by the reaction of 1 with disodium resor-cinolate. Ergebnisse und Diskussion Läßt man Bis(fluordiisopropylsilyl)amin (1) im Molverhältnis 1; 1 mit dinatriiertem Brenzcatechin reagieren, entsteht das neuartige, siebengliedrige H eteraphan 2. Im Gegensatz zum Brenzcatechin sind bei Resorcin die Sauerstoffatome in 1,3-Stel-lung am A rom aten gebunden. Dies bewirkt, daß dinatriiertes Resorcin aus sterischen Gründen mit 1 nicht analog der Bildung von 2 zu einem acht-gliedrigen, sondern zum bislang unbekannten 16-gliedrigen H eteraphan 3 reagiert. 
  Reference    Z. Naturforsch. 50b, 687—690 (1995); eingegangen am 13. September 1994 
  Published    1995 
  Keywords    0, C-Heteraphanes -Synthesis Silicon, Macrocycle, Heteraphane, Crystal Structure 
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 Identifier    ZNB-1995-50b-0687_n 
 Volume    50 
26Author    S. Münchau, Hk Müller-BuschbaumRequires cookie*
 Title    Zur Kristallchemie eines Silber-Cadmium-Oxovanadats: AgCdV04 On the Crystal Chemistry of a Silver Cadmium Oxovanadate: A gC dV 04  
 Abstract    Single crystals of A gC dV 04 have been prepared in closed silver tubes using V20 5 as a flux. The light-orange crystals sho\v orthorhom bic symmetry, space group D2h-Pnm a, a = 9.786(2), b = 6.994(1), c = 5.439(1) A, Z = 4. The hitherto unknown A gC dV 04 is related to the Olivine structure but isotypic to Ag2C r 0 4 and NaCd4(V 0 4)3 respectively. The differences in crystal chemistry between the Olivine type, NaCd4(V 0 4)3 and A gC dV 04 are discussed. 
  Reference    Z. Naturforsch. 50b, 703—706 (1995); eingegangen am 10. O ktober 1994 
  Published    1995 
  Keywords    Silver, Cadmium, Vanadium, Oxide, Crystal Structure 
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 Identifier    ZNB-1995-50b-0703 
 Volume    50 
27Author    H. Szillat, Hk Müller-BuschbaumRequires cookie*
 Title    On the Oxocuprate (C u,C o)375Mo30 12  
 Abstract    Single crystals of (C u,C o)3 7?Mo30 12 have been prepared by recrystallization from melts and investigated by X-ray diffractometer techniques. TTie compound crystallizes with ortho-rhombic symmetry, space group D'2 6 h-P n m a , a = 5.092(1), b = 10.624(3), c = 17.804(4) A, Z = 4 and is isotypic to NaCo2.3iMo30 12. The crystal structure is discussed and it is shown, that the trigonal prismatically coordinated copper positions are occupied in a different m an­ ner. One of the alternate sites is beside the centre of the prisms, and the other one is shifted towards one of the faces of the rectangular prism. This detail may be interpreted by assigning the valance states C u1 and Cu11. The M 0 6 octahedra are occupied statistically by copper and cobalt. 
  Reference    Z. Naturforsch. 50b, 707—711 (1995); eingegangen am 10. O ktober 1994 
  Published    1995 
  Keywords    Crystal Structure, Copper, Cobalt, Molybdenum, Oxide 
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 Identifier    ZNB-1995-50b-0707 
 Volume    50 
28Author    H. Szillat, Hk Müller-BuschbaumRequires cookie*
 Title    Zur Darstellung und Kristallstruktur eines neuen Kupfer-Antimon-Oxomolybdats: CuSbMo20 8 On the Synthesis and Crystal Structure of a New Copper Antimony Oxomolybdate: CuSbMo20 8  
 Abstract    Single crystals of the hitherto unknown com pound CuSbMo2O s were prepared by recrys­ tallization from melts in closed copper tubes and investigated by X-ray diffractometer techni­ que. CuSbMo^Os crystallizes in a new structure type with monoclinic symmetry, space group q ? h-I 1 2 /a l, a = 5.554(2), b = 4.916(1), c = 21.519(4) Ä, ß = 93.42(3)°, Z = 4. The crystal structure shows Sb111 in a one-sided coordination by four oxygen. Molybdenum shows the rare octahedral coordination by oxygen. M o 0 6 and C u 0 6 octahedra form triple layers stacked and connected by Sb ions along [001], 
  Reference    Z. Naturforsch. 50b, 717—720 (1995); eingegangen am 12. O ktober 1994 
  Published    1995 
  Keywords    Crystal Structure, Copper, Antimony, Molybdenum, Oxide 
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 Identifier    ZNB-1995-50b-0717 
 Volume    50 
29Author    M. Schnock+, P. BöttcherRequires cookie*
 Title    Darstellung und Kristallstruktur von [Cs4(Dibenzo-18-Krone-6)3](S6)2-2CH3CN Synthesis and Crystal Structure of [Cs4(Dibenzo-18-Krone-6)3](S6)2 * 2 CH3CN  
 Abstract    [Cs4(dibenzo-18-crown-6)3](S6)2-2CH3CN has been prepared from dibenzo-18-crown-6, Cs2C 0 3 and suifur in acetonitrile saturated with H 2S. The title compound crystallizes in space group P I (lattice dimensions: a = 10,507(7)Ä, b = 11,504(6) A, c = 17,792(9) A, a = 97,86(4)°, ß = 105,86(4)°, y = 101,48(5)°) with one formula unit. The crystallographic units are built of stacks of three crown ether molecules and two hexasulfide chains with the cations located between them. The conformation of the hexasulfide chains is all-cis. 
  Reference    Z. Naturforsch. 50b, 721—724 (1995); eingegangen am 15. Septem ber 1994 
  Published    1995 
  Keywords    Cesium, Crown Ether, Polysulfide, Crystal Structure 
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 Identifier    ZNB-1995-50b-0721 
 Volume    50 
30Author    R. Oland Eger, R. Einhard, K. K. Rem Er, A. Rn, T. SimonRequires cookie*
 Title    Y7 I1 2 C2 N: Eine Verbindung aus Einheiten zweier Y6 (C2)-Oktaeder und eines Y6 N 2-Tetraederdoppels  
 Abstract    Y 7 Ii2C2N: A C om pound with U nits of Two Y 6(C 2) O ctahedra and a Y 6N 2 D ouble T etrahedron H ansjürgen M attausch, H orst B o rrm an n , The new compounds Y7I12C2N and H o7I 12C2N have been prepared by reaction of stoi­ chiometric amounts of the metals (R E), R E I3, REN and C in closed Ta capsules at 1150 and 1120K, respectively. Pure samples of the compounds were obtained after 5 days annealing time. The crystals with xenomorphic shape are olive-green (Y7I12C2N) or red-brown (H o7I I2C2N) in colour and sensitive to air and moisture. Y7I 12C2N crystallizes in the space group P I (No. 2) with lattice constants a = 971.24(7), b = 1030.38(7), c = 1673.58(11) pm and a = 101.366(5), ß = 92.758(5), y = 112.799(5)°. According to Guinier photographs H o7I12C2N is isotypic with the lattice consiants u -968.8(3), b = 1028.7(3), r. = 1667.8(5) pm and a = 101.31(2), ß = 92.78(2), y = 112.80(1)°. In the structure the C atoms are present as C2 units with a C -C distance of 144 pm. These C2 units are octahedrally coordinated by Y atoms (o x). The N atoms are in the center of Y4 tetrahedra, which are linked via a com mon edge to form double tetrahedra (t2). By condensa­ tion of N-centered double tetrahedra (t2) with a C2-centered Y octahedron (01) the character­ istic units Ojt2Oi are formed. The I atom s coordinate all free edges and corners of these units and connect them via I '-I ° contacts parallel [100] and [001]. The compounds are semiconducting. H o7I12C2N exhibits Curie-Weiss behaviour with 6 = 15(1) K and ue({ = 10.5(1) f.iB. 
  Reference    Z. Naturforsch. 50b, 931—936 (1995) 
  Published    1995 
  Keywords    Yttrium Iodide Carbide Nitride, Holmium Iodide Carbide Nitride, Crystal Structure 
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 Identifier    ZNB-1995-50b-0931 
 Volume    50 
31Author    Wilfried Bubenheim, Ulrich MüllerRequires cookie*
 Title    Tetraphenylphosphonium- tris(tetrasulfido)stannat, (PPh4)2[Sn(S4)3] Tetraphenylphosphonium Tris-tetrasulfido- stannate, (PPh4)2[Sn(S4)3]  
 Abstract    PPh4[SnCl3] reacts with Na2S4 in acetonitrile to give the title compound as one of the products. Its crystal structure was determined by X-ray diffrac­ tion (R = 0.071 for 3288 reflexions). Crystal data: monoclinic, P2JC, Z = 4, a = 1301.2(3), b = 1139.1(2), c = 3476.2(7) pm, ß = 97.82(3)°. (PPh4)2[Sn(S4)3] is isotypic with (PPh4)2[Sn(Se4)3] and contains [Sn(S4)3]2-ions in which three tetra-sulfido groups are chelating an octahedrally coordi­ nated tin atom. 
  Reference    Z. Naturforsch. 50b, 1135 (1995); eingegangen am 27. Januar 1995 
  Published    1995 
  Keywords    Tetraphenylphosphonium tris-tetrasulfido-stannate, Synthesis, Crystal Structure 
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 Identifier    ZNB-1995-50b-1135_n 
 Volume    50 
32Author    J. Schaefer, K. BluhmRequires cookie*
 Title    Synthese und Kristallstruktur von CuLn2[B20 5]2 (Ln = Er3*, Lu3+): zwei Kupferlanthanoidborate m it^ [B 20 5 ]4_-A nionen Synthesis and Crystal Structure of CuLn2[B20 5]2 (Ln = E r3+, Lu3+): Two Copper Lanthanoid B orates with 2.[B20 5]4~-Anions  
 Abstract    Single crystals of the new com pounds CuLn2[B20 5]2 (Ln = Er3+(I), Lu3+(II)) were ob­ tained by a B9O 3 flux-technique. They crystallize in the space group C ih -P 2 \lc with I: a = 453.14(6); b = 721.94(5); c = 929.5(4) pm; ß = 90.01(3)°; Z = 2 und II: a = 451.4(4); b = 718.3(1); c = 928.1(3) pm; ß = 90.00(6)°; Z = 2. The compounds are isotypic to CuTm2[B20 5 ] 2 as well as to the mineral Gadolinite (FeY 2 [B eSi0 5 ]2) and exhibit layer like 2.[B20 5]4 --anions consisting of edge sharing B 0 4 -tetrahedra, which form four-and eight-membered rings. The borate anions are separated by layers of elongated C u 0 6-octahedra and slightly distorted tetragonal L n 0 8-antiprisms. 
  Reference    Z. Naturforsch. 50b, 1141—1145 (1995); eingegangen am 19. Januar 1995 
  Published    1995 
  Keywords    Copper, Erbium, Lutetium, Borate, Crystal Structure 
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 Identifier    ZNB-1995-50b-1141 
 Volume    50 
33Author    Anne Utzolino, Karsten BluhmRequires cookie*
 Title    Zur Synthese und Kristallstruktur von manganhaltigen Boratoxiden  
 Abstract    M nF e(B 03) 0 und MnAl0,5Yo,5(B03) 0 Synthesis and Crystal Structure of Manganese Borate Oxides: M nFe(B03) 0 and MnAlo.5Yo.5(B 0 3) 0 Single crystals of the compounds M n F e(B 0 3) 0 (I) and MnAlo.5Y o.5(B 03) 0 (II), were obtained by a B20 3 flux technique. I crystallizes with orthorhombic symmetry, space group D ^ -P n m a (Nr.62), a -939.92; b = 319.41; c = 939.11 pm; Z = 4 and II with monoclinic symmetry, space group C2h-P 2 i/n (Nr. 14). a = 325.6; b = 955.1; c = 929.2 pm; ß = 90.70° ; Z = 4. I is isotypic to the mineral Warwickite, while II is a distorded variant of this structure. All metal ions are octahedrally coordinated. Both structures contain isolated, trigonal planar B 0 3 units and oxygen atoms that are not coordinated to boron. 
  Reference    Z. Naturforsch. 50b, 1146—1150 (1995); eingegangen am 5. D ezem ber 1994 
  Published    1995 
  Keywords    Manganese, Iron Aluminium, Yttrium, Borate Oxide, Crystal Structure 
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 Identifier    ZNB-1995-50b-1146 
 Volume    50 
34Author    Sabine Münchau, Karsten BluhmRequires cookie*
 Title    Zur Synthese und Kristallstruktur von Kupfercadmiumpyroboratoxid: Cu2Cd(B20 5) 0 Synthesis and Crystal Structure of Copper Cadmium Pyroborate Oxide: Cu2Cd(B20 5) 0  
 Abstract    Single crystals of the new compound Cu2C d(B20 5) 0 have been prepared by B 20 3/V 20 5 flux technique in a closed silver tube. Their structure is isotypic with Cu2C o(B 20 5) 0 but its preparation is quite different. X-ray investigations on single crystals led to the space group C |h-P 2 !/c (Nr. 14), a = 339.9(2); b = 1509.8(2); c -927,0(1) pm; ß = 93.19(1)°; Z -4. The structure contains isolated B 2O s groups and oxygen that is not coordinated to boron. Cad­ mium is octahedrally coordinated by oxygen, while copper exhibits a nearly square planar or a fivefold pyramidal coordination. 
  Reference    Z. Naturforsch. 50b, 1151 (1995); eingegangen am 19. Januar 1995 
  Published    1995 
  Keywords    Copper, Cadmium, Pyroborate, Oxide, Crystal Structure 
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 Identifier    ZNB-1995-50b-1151 
 Volume    50 
35Author    VerbindungC., S. Münchau, Hk Müller-BuschbaumRequires cookie*
 Title    Synthese und Kristallstruktur einer mit dem Johillerit verwandten  
 Abstract    Single crystals of C dC u^M gx.5Pbo.5V30 12 have been prepared in closed steel tubes using V 20 5 as a flux. The orange crystals show monoclinic symmetry, space group C2h-C 2 /c , a = 12.417(5), b = 12.983(6), c = 6.911(3) Ä , ß = 113.02(1)°, Z = 4. CdCu1.5Mg1.5PbojV30 12 reveals a relationship to the Johillerite type, but it is characterized by an additional point position for cadmium, situated betw een the square planar C u 0 4 polygons of the Johillerite structure. 
  Reference    Z. Naturforsch. 50b, 1158—1162 (1995); eingegangen am 22. D ezem ber 1994 
  Published    1995 
  Keywords    Cadmium, Copper, Magnesium, Lead, Vanadium, Oxide, Crystal Structure 
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 Identifier    ZNB-1995-50b-1158 
 Volume    50 
36Author    J. Feldmann, Hk Müller-BuschbaumRequires cookie*
 Title    Kristallstrukturuntersuchung an einem bismuthaltigen Hollandit: Crystal Structure Investigation of the Bismuth Containing Hollandite: Bij 9Cu4V40 16  
 Abstract    Single crystals of B^ 9Cu4V 4O i6 have been prepared by quenching of CO2-LA SER heated samples. They were investigated by X-ray techniques. The compound^ crystallizes with tetra­ gonal symmetry, space group C4h-I 4 /w , a = 9.945(2) A, c = 2.915(3) A, Z = 1, and is isotypic to the mineral Hollandite. B^ 9Cu4V4O i6 is the first Hollandite with a statistical distribution of vanadium and copper in the network o f octahedra. Calculations of the Coulomb terms of lattice energy led to a distance o f bismuth to the lone pair of 1.07 A. Considering the lone pair as part of the coordination sphere of Bi3+ a square pyramidal polyhedron is obtained. 
  Reference    Z. Naturforsch. 50b, 1163—1166 (1995); eingegangen am 22. D ezem ber 1994 
  Published    1995 
  Keywords    Bismuth, Copper, Vanadium, Oxide, Crystal Structure 
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 Identifier    ZNB-1995-50b-1163 
 Volume    50 
37Author    R. Ainer PöttgenRequires cookie*
 Title    EuPdGe -a New Germanide with EuNiGe Type Structure  
 Abstract    The title compound was prepared from the elem ental com ponents in a tantalum tube at 1070 K and investigated by X-ray diffraction of both powder as well as single crystals. The crystal structure was refined from four-circle diffractometer data: P 2 xln, a = 618.1(1), b = 613.6(1), c = 743.9(1) pm, ß = 109.40(1)°, V = 0.2661(1) nm3, Z = 4 ,w R 2 = 0.0536 for 1564 F2 values and 29 variables. EuPdGe crystallizes with the E uN iG e type structure. Both Pd and G e atom s in EuPdGe have three germanium or palladium neighbors, respectively. They form two-dim ensionally infinite [PdGe] polyanions which consist o f corrugated 4.82 nets. These polyanions are separated by the europium atoms. 
  Reference    Z. Naturforsch. 50b, 1181—1184 (1995); received March 1 1995 
  Published    1995 
  Keywords    Germanide, Crystal Structure, X-Ray, Europium 
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 Identifier    ZNB-1995-50b-1181 
 Volume    50 
38Author    KatrinA. Köhler, H. Lexander Steiner, W. Erbert, RoeskyRequires cookie*
 Title    Die Kristallstrukturen von (j75-C5Me5)MoMe4 und (j75-C5Me5)WMe4 The Crystal Structures of (?75-C5Me5)M oMe4 and (^5-C5Me5)W M e4  
 Abstract    The crystal structures of (/75-C5Me5)MoMe4 1 and (j/5-C5Me5)WMe4 2 are reported. 1 and 2 crystallize in the orthorhom bic space group Pbcm with the lattice param eters a = 681.4(2) pm, b = 1538.6(6) pm, c = 1402.4(6) pm with 4 units per cell (1), and a = 684.99(6) pm, b = 1547.3(2) pm, c = 1405.5(2) pm with 4 units per cell (2). Both compounds are monomeric and have a square-pyramidal geometry. 
  Reference    Z. Naturforsch. 50b, 1207—1209 (1995); eingegangen am 20. Januar 1995 
  Published    1995 
  Keywords    Molybdenum, Tungsten, Alkyl Complexes, Crystal Structures 
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 TEI-XML for    default:Reihe_B/50/ZNB-1995-50b-1207.pdf 
 Identifier    ZNB-1995-50b-1207 
 Volume    50 
39Author    Z. NaturforschRequires cookie*
 Title    Hexacarbonyldieisen-stabilisierte Sulfimid-Derivate, Fe2(CO)6(w-SNR)  
 Abstract    Hexacarbonyl diiron com plexes of N-substituted sulfimides (SN R) have been obtained from the parent tetrahedrane, Fe2(C O)6(//-SN H) (1), by deprotonation to give the anion Fe2(C O)6(/i-SN _) (2) and subsequent reaction with either trialkyloxonium or carbenium tetrafluoroborates. The new aza-diferra-thia-tetrahedranes, Fe2(C O)6(w-SNR) (R = CH3 (3a), C2H5 (3b), CPh3 (3c), cyc/o-C^Ph^ (3d), cyclo-C 7H 7 (3e), and cyc/o-(C7H 7)M (CO)3 with M = Cr (3f), Mo (3g), W (3h)) were characterized by their 'H and 13C NM R as well as their IR and MS spectra. The molecular structure of Fe2(C O)6[S N -cy c/o -C 7H 7M o(C O)3] (3g) has been determined by X-ray diffraction. 
  Reference    Z. Naturforsch. 50b, 1252—1556 (1995); eingegangen am 29. Dezem ber 1994 
  Published    1995 
  Keywords    Sulfimide Complexes, Hexacarbonyl Diiron Complexes, Crystal Structure 
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 TEI-XML for    default:Reihe_B/50/ZNB-1995-50b-1252.pdf 
 Identifier    ZNB-1995-50b-1252 
 Volume    50 
40Author    M. Arietta, S. Schriewer-Pöttgen, Wolfgang JeitschkoRequires cookie*
 Title    Two Modifications of Hg5Re2O 10  
 Abstract    The previously reported mercury perrhenate Hg5 Re2O 10, prepared hydrothermally, has now been obtained by reaction of HgO with the mercury(II) metaperrhenate H g (R e 0 4)2 in sealed silica tubes. A second modification o f this compound can be obtained by reaction of elem ental mercury with H g (R e 0 4)2 also in sealed silica tubes. Its crystal structure has been determined from single-crystal X-ray data: P 2 x/c, a -861.5(1), b = 1200.9(2), c = 1203.9(2) pm, ß = 97.15(1)°, Z = 4, R = 0.024 for 1733 structure factors and 105 variables. Both modifi­ cations may be represented by the formula H g2+-2H g20 -2 R e 0 4_, indicating that mercury occurs in oxidation states I and II. In both modifications the mercury and some oxygen atoms form two-dimensionally infinte, puckered, cationic nets of the composition (H g2+-2H g20)" , which are separated by the R e 0 4~ tetrahedra. In the modification reported earlier the mer­ cury oxygen nets consist of condensed 16-membered rings, while the nets of the present modification contain 10-and 22-membered rings. 
  Reference    Z. Naturforsch. 50b, 1335—1339 (1995); received February 27 1995 
  Published    1995 
  Keywords    Crystal Structure, Mercury Perrhenates, Phase Transitions 
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 TEI-XML for    default:Reihe_B/50/ZNB-1995-50b-1335.pdf 
 Identifier    ZNB-1995-50b-1335 
 Volume    50 
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