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201Author    AnneU. Tzolino, K. Arsten BluhmRequires cookie*
 Title    Synthese und röntgenographische Charakterisierung von zwei neuen Verbindungen des Ludwigit-Strukturtyps: Co5Sn(B0 3)2 0 4 und Co5Mn(B0 3 )20 4  
 Abstract    Synthesis and X -R ay C haracterization o f Two New Com pounds with Ludw igite-Structure: C o5S n (B 0 3)20 4 and C o5M n (B 0 3)20 4 The compounds Co5Sn(B 03)20 4 (I) and Co5M n(B03)20 4 (II) were prepared by using a B20 3 flux technique. Single crystals were investigated by X-ray diffraction and showed orthorhombic symmetry, space group D2h-Pbam (No. 55), I a = 944.4; b = 1233.8; c = 310.5 pm; Z = 2 and II a = 925.07; b = 1241.67; c = 305.24 pm; Z = 2. Both compounds are isotypic to the mineral Ludwigite. All metal point positions show an octahedral oxygen coordination. Co2+ and M4+ (M = Sn or Mn) occupy one point position statistically. Both structures contain isolated, trigonal planar B 0 3 units and oxygen atoms that are not coordinated to boron. 
  Reference    Z. Naturforsch. 51b, 305—308 (1996); eingegangen am 28. September 1995 
  Published    1996 
  Keywords    Cobalt, Tin, Manganese, Borate Oxide, Crystal Structure 
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 Identifier    ZNB-1996-51b-0305 
 Volume    51 
202Author    Park, K. Arsten BluhmRequires cookie*
 Title    Pb6(A s0 4)  
 Abstract    [B (A s04)4] -ein neuartiger Kristallstrukturtyp im System Pb0 /B2 0 3 /As2 0 5 mit einem Beitrag über P b(B A s05) Pb6(A s 0 4)[B (A s 0 4)4] -a New Crystal Structure Type in the System P b 0 /B 20 3/A s20 3 w ith R em arks about P b (B A s0 5) C heong- Single crystals of Pb6(A s04)[B(As04)4] (I) and Pb(BAs05) (II) were obtained by melting B->03, As20 5 and PbO at 800 °C. X-ray investigation led to the space group (I): S4 -P4 (Nr. 81) with a = 715.4(1), c = 976.2(3) pm, Z = 1 and (II): C | -P3, (Nr. 144) with a = 712.2(1), c = 693.5(2) pm, Z = 3. While (II) is isotypic to the Stillwellite structure, Pb^(As04)[B(As04)4] represents a completely novel type of crystal structure. Boron and arsenic are tetrahedrally coordinated by oxygen. These polyhedra form two kinds of isolated anions: A s04'~ and B(A s04)49_. Lead is eightfold coordinated by oxygen. 
  Reference    Z. Naturforsch. 51b, 313—318 (1996); eingegangen am 16. Oktober 1995 
  Published    1996 
  Keywords    Lead, Arsenic, Borate, Synthesis, Crystal Structure 
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 Identifier    ZNB-1996-51b-0313 
 Volume    51 
203Author    Silke Busche, K. Arsten BluhmRequires cookie*
 Title    Ba2KZn3(B306)(B60 13)  
 Abstract    Single crystals of the new compound Ba2KZn3(B30 6)(B60 | 3) were obtained by using a B20 3 flux technique; they crystallize in an as yet unknown structure type. X-ray investigations led to the space group C '-P l (Nr.2) with lattice parameters a = 705.2(2), b = 712.5(2), c = 1880.3(6), a = 93.43(3)°, ß = 90.72(2)°, 7 = 119.57(2)°, Z = 2. The structure contains (B30 6)3~-rings and a new discrete (B60 13)8~ anion, which is composed of two B 0 4 and two B20 5 units. Zn-+ is tetrahedrally coordinated by oxygen and two out of three tenfold coordinated Ba-sites are statistically occupied by Ba2+ and K+. 
  Reference    Z. Naturforsch. 51b, 319—324 (1996); eingegangen am 26. September 1995 
  Published    1996 
  Keywords    Barium, Potassium, Zinc, Borate, Crystal Structure 
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 Identifier    ZNB-1996-51b-0319 
 Volume    51 
204Author    Regina Bettenhausen, Wolfgang Milius, Wolfgang SchnickRequires cookie*
 Title    Synthese und Kristallstruktur von [H2NMe2]+[(Me2 NH)2 TiCl4 ]_ Synthesis and Crystal Structure of [H2NMe2]+[(Me2NH)2TiCl4]~  
 Abstract    The title compound has been synthesized as a green solid by the reaction of M eCl2 SiNHSiM e3 and Ti(NM e2)4 in CH2C12. The crystal structure was determined by single crystal X-ray methods at room temperature (C2/c, a = 1825,7(4), b = 909,9(2), c = 1116,1(2) pm, ß = 125,09(3)°, Z = A,R\= 0,047, wR2 = 0,147) to be an ionic salt [H2NMe2]+[(Me2NH)2TiCl4]" . The central titanium(III) atom of the anion is bound to four Cl atoms and weakly coordinated by two Me2NH ligands. 
  Reference    Z. Naturforsch. 53b, 239—241 (1998); eingegangen am 20. November 1997 
  Published    1998 
  Keywords    N-Silyl Amides, Crystal Structure, Titanium 
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 Identifier    ZNB-1998-53b-0239 
 Volume    53 
205Author    Z. NaturforschRequires cookie*
 Title    Untersuchungen an Polyhalogeniden, X X X IY  
 Abstract    [1] Cäsium(18-Krone-6)dichloroiodat(I), [Cs(C12H 240 6)]IC12 S tu d ies o n P olyhalides, X X X IV [1] C e siu m (1 8 -cro w n -6)d ich lo ro io d ate , [C s(C 12H 240 6)]IC12 M e rv a t E l E ssa w i3, K arl-F rie d ric h T e b b e * b a Chemical D epartm ent, The new compound [Cs(18-crown-6)]ICl2 has been prepared by the reaction of cesium chloride and 18-crown-6 with iodine chloride in ethanol and structurally characterized by X-ray diffrac­ tion methods. The geometries of the cation [Cs(18-crown-6)]+ and of the anion IC12~ are as expected. 
  Reference    Z. Naturforsch. 53b, 263—265 (1998); eingegangen am 5. November 1997 
  Published    1998 
  Keywords    Polyhalogenide, Dichloroiodate, Crown Complex, Cesium Compound, Crystal Structure 
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 Identifier    ZNB-1998-53b-0263_n 
 Volume    53 
206Author    R. Rettich, Hk Müller-BuschbaumRequires cookie*
 Title    Zur Kristallchemie der Silber-Mangan-Oxovanadate Ag2BaMnV20 8 und (AgCa2)Mn2(V 04)3 On the Crystal Chemistry of the Silver Manganese Oxovanadates Ag?BaMnV?Oo and (AgCa2)Mn2(V 0 4)3  
  Reference    Z. Naturforsch. 53b, 291—295 (1998); eingegangen am 12. Januar 1998 
  Published    1998 
  Keywords    Barium, Calcium, Manganese, Vanadium Oxide, Crystal Structure 
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 Identifier    ZNB-1998-53b-0291 
 Volume    53 
207Author    Z. NaturforschRequires cookie*
 Title    Kristallstruktur  
 Abstract    von [Mo(CO)3(NCMe)(SrBu)]2 C ry stal S tru c tu re o f [M o (C O)3(N C M e)(S rB u)]2 M ike R. K opp, B e rn h a rd N eu m ü ller* Single crystals of [M o(CO)3(NCM e)(S'Bu)]2 (1) and [{Mo(CO)3}2{Mo(CO)2}{S'Bu}4] (2) were obtained by the reaction of [M o(CO)3(NCM e)3] with [(PhCH2)2GaS'Bu]2 in 1,4-dio-xane. The X-ray structure determination of 1 showed the presence of a Mo2S2 four-membe-red ring with a Mo-Mo bond length of 296,7(1) pm. Space group Pbca, Z = 4, lattice dim en­ sions at -80 °C: a = 1588,2(3), b = 905,8(1), c = 1676,0(1) pm, R y = 0,0555. 
  Reference    Z. Naturforsch. 53b, 378—380 (1998); eingegangen am 8. Dezember 1997 
  Published    1998 
  Keywords    Molybdenum Carbonyl Complex, Thiolato Complex, Crystal Structure 
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 Identifier    ZNB-1998-53b-0378 
 Volume    53 
208Author    R. Rettich, Hk Müller-BuschbaumRequires cookie*
 Title    Darstellung und Strukturbeschreibung von NaCa3 Mn(V2O7)(V3 O10) Preparation and Structure o f NaCa3M n(V2O 7)(V3O 10)  
 Abstract    Single crystals of NaCa3Mn(V2O7)(V3O 10) have been prepared by crystallization from flux in argon atmosphere. X-Ray single crystal methods led to triclinic symmetry, space group C '-P l, 
  Reference    Z. Naturforsch. 53b, 507—511 (1998); eingegangen am 22. Januar 1998 
  Published    1998 
  Keywords    Sodium, Calcium, Manganese, Vanadium Oxide, Crystal Structure 
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 Identifier    ZNB-1998-53b-0507 
 Volume    53 
209Author    M. Staack, Hk Müller-BuschbaumRequires cookie*
 Title    Ba4M n2Ag20(As04)4? ein Barium-Mangan-Oxid-Arsenat mit nichtlinearen O-Ag-O-Hanteln. Ba4Mn2Ag2 0 (As0 4 )4, a Barium Manganese Oxide-Arsenate Showing Nonlinear O-Ag-O Dumbbells  
 Abstract    Single crystals of Ba4Mn2 Ag20 (A s04)4 have been prepared by solid state reactions using me­ tallic silver as reactant. X-ray techniques led to monoclinic symmetry, space group D2h-P2,/m, 
  Reference    Z. Naturforsch. 53b, 512—516 (1998); eingegangen am 29. Januar 1998 
  Published    1998 
  Keywords    Barium, Manganese, Silver, Oxide-Arsenate, Crystal Structure 
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 Identifier    ZNB-1998-53b-0512 
 Volume    53 
210Author    Hk Sfreddo, Müller-BuschbaumRequires cookie*
 Title    Indium partiell in tetraedrischer Sauerstoffkoordination in BaIn2Zn30 7 . Eine Betrachtung zum Ba2Ln2Zn80 13/BaLnAlZn3 0 7 -Typ Partial Tetrahedral Oxygen Coordination of Indium in BaIn2Zn30 7. A Consideration of the Ba2Ln2Zn80 13/BaLnAlZn30 7 Type O  
 Abstract    Single crystals of BaIn2Zn30 7 have been prepared by solid state reaction and crystallization from flux. X-ray investigations led to hexagonal symmetry, space group C6V-P6 3mc, lattice constants a = 6.342(1), c = 10.282(1) A, Z = 2. BaIn2Zn30 7 shows tetrahedral positions statistically occupied by In3+ and Zn2+. The crystal structure is isotypic to Ba2Ln2Zn80 13 and BaLnAlZn30 7. A discussion of the related compounds is given. 
  Reference    Z. Naturforsch. 53b, 517—520 (1998); eingegangen am 29. Januar 1998 
  Published    1998 
  Keywords    Barium, Indium, Zinc, Oxide, Crystal Structure 
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 Identifier    ZNB-1998-53b-0517 
 Volume    53 
211Author    S. Meyer, Hk Müller-BuschbaumRequires cookie*
 Title    Zur Kenntnis eines Vanadyl-Oxocuprat-Phosphats CaCu  
 Abstract    (V0)(P0 4) 2 mit Cu2+ auf Positionen der V 0 2+-Ionen und einer kupferreicheren Phase CaCulvt3(VO)o,87(P04)2 On an Vanadyl Oxocuprate Phosphate C aC u(V 0)(P 04)2 Containing Cu2+ at Positions of V 0 2+ Ions and a Copper Rich Phase CaCu, !3(VO)0 g7(P04)2 Single crystals of CaCu(V 0)(P04)2 (I) and CaCu,.i3(VO)o.87(P04)2 (II) have been prepared using solid state reactions in closed and evacuated quartz tubes. X-ray characterization led to 
  Reference    Z. Naturforsch. 53b, 521—526 (1998); eingegangen am 4. Februar 1998 
  Published    1998 
  Keywords    Calcium, Copper, Vanadyl-Phosphate, Crystal Structure 
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 Identifier    ZNB-1998-53b-0521 
 Volume    53 
212Author    B. Wedela, K. Sugiyamaa, Hk Müller-BuschbaumRequires cookie*
 Title    Verknüpfung von (Te06)6-und (Te06)3(N i06)3-Sechsringen durch TeNiOp-Oktaederdoppel in Pb3Ni4i5Te2? 5 0 15 Connection of (TeOö)6 and (Te06)3(N i0 6)3 Hexagons by T eN i09 Octahedra Double in Pb3Ni4 5Te2 50 15  
 Abstract    Single crystals of Pb3Ni4 5Te2 5 0 15 have been prepared by heating pellets of mixtures of PbO, T e02 and nickel hydroxide carbonate to 730 °C in air. X-ray investigations led to hexagonal 
  Reference    Z. Naturforsch. 53b, 527—531 (1998); eingegangen am 11. Februar 1998 
  Published    1998 
  Keywords    Lead, Nickel, Tellurium Oxide, Crystal Structure 
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 Identifier    ZNB-1998-53b-0527 
 Volume    53 
213Author    Tristram Chivers, Xiaorong Li, Masood ParvezRequires cookie*
 Title    Preparation and X-Ray Structure of 3,5-Dimethyl-1,4-dichloro-1,2,6- thiadiazine-1 -oxide  
 Abstract    The title compound was obtained by the reaction of 3,5-dimethyl-2//-l,2,6-thiadiazine-l,l-dioxide with PCI5 in chloroform. It crystallizes in the monoclinic system, space group P2\/c, a = 7.521(7) A, b = 8.400(4) A, c = 13.908(4) Ä, ß = 100.35(4)°, V = 864.4(8) A3, and Z = 4. The S(VI) atom lies 0.43 A out of the plane of the 7r-delocalized NCCCN unit. The mean S-N bond distance is 1.569(3) A. 
  Reference    Z. Naturforsch. 53b, 532—534 (1998); received December 18 1997 
  Published    1998 
  Keywords    Crystal Structure, 1, 2, 6-Thiadiazines, Sulfanuric Chloride 
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 Identifier    ZNB-1998-53b-0532 
 Volume    53 
214Author    Reinhold Tacke, Joachim Heermann, Melanie PiilmRequires cookie*
 Title    Pentafluoro[(4-methyl-1,4-bisazoniacy clohex-1 -yl)methy 1] germanate Hydrate: Synthesis and Crystal Structure of a Zwitterionic A6Ge-Germanate with a GeF5C Framework  
 Abstract    The zwitterionic (molecular) A6Ge-germanate pentafluoro[( 
  Reference    Z. Naturforsch. 53b, 535—539 (1998); received December 17 1997 
  Published    1998 
  Keywords    Hexacoordinate Germanium, Zwitterion, Preparation, Crystal Structure 
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 Identifier    ZNB-1998-53b-0535 
 Volume    53 
215Author    MikeR. Kopp, Bernhard NeumüllerRequires cookie*
 Title    Benzylgallium-Verbindungen. Die Kristallstrukturen von [Mg3Br2  
 Abstract    ,4Cl1,6(OEt2)6][Ga(CH2Ph)4]2 • 0,5 Toluol und [(3,5-Me2C6H3CH2)2GaBr]2 Benzylgallium Compounds. The Crystal Structures of [Mg3Br2 4C1 j 6(OEt2)6][Ga(CH2Ph)4]2 • 0.5 Toluene and [(3,5-Me2C6H3CH2)2GaBr]2 [Mg3Br2 4C1] 6(OEt2)6][Ga(CH2Ph)4]2-0.5 toluene (1) can be obtained by the reaction of one equivalent of GaCl3 with four equivalents of PhCH2MgBr in Et20 . Recrystallization of the crude product from toluene at 60°C gives colorless crystals of 1. Treatment of GaCl3 with two equivalents 3,5-Me2C6H3CH2MgBr in Et20 gives after recrystallization from toluene the diorganogallium bromide [(3,5-Me2C6H3CH2)2GaBr]2 (2). 1 and 2 were characterized by NMR, IR and MS techniques as well as by X-ray structure analyses. 1 consists in the dication [Mg3Br2 4C1, 6(OEt2)6]2+, two gallate units [Ga(CH2Ph)4]_ and a toluene molecule, disordered around a center of inversion. 2 forms centrosymmetric dimers [(3,5-Me2C6H3CH2)2GaBr]2. 
  Reference    Z. Naturforsch. 53b, 545—551 (1998); eingegangen am 5. Februar 1998 
  Published    1998 
  Keywords    Gallium Compounds, Magnesium Compound, Crystal Structures 
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 Identifier    ZNB-1998-53b-0545 
 Volume    53 
216Author    V. Erena, M.T T Hiede, W. Olfgang, JeitschkoRequires cookie*
 Title    Ternary Intermetallic Compounds L«Mn2Ali0 (Ln = Y, La-Nd, Sm, Gd-Dy) and L«Re2Al10 (Ln = Ce, Pr, Sm) with CaCr2Al10-Type Structure  
 Abstract    The twelve title compounds have been prepared for the first time. Their CaCnA lio-type structure (PA/nm m, Z = 4) was refined from single-crystal X-ray data for the three representatives TbM mAlio (a = 1274.3(2) pm, c = 511.4(2) pm, R = 0.025 for 680 structure factors F and 43 variable parameters VO, CeRe2Alio (a -1295.5(5) pm, c -517.2(4) pm, R = 0.054 for 810 F a n d 46 V), and SmReaAlio (a = 1291.5(2) pm, c = 516.5(1) pm, R = 0.021 for 622 F and 46 V). The atomic positions of the lanthanoid and transition metal atoms are fully occupied. Significant deviations from the full occupancies were observed for two aluminum sites in TbM mAlio and for all five aluminum sites of the two rhenium-containing compounds, resulting in the compositions TbMn2Al9.63(2), CeRe2Al9.52(8), and SmRe2Al9.i6< 9)-The cell volume of CeRe2Alio and to a smaller extent also that of CeMm A1 io indicate mixed or intermediate +III/+IV valencies of the cerium atoms in these compounds. The structural relationships between the three closely related body-centered tetragonal structures of ThM ni2, CeMn-iAlx, DyFeöAU, and the primitive tetragonal structure of CaCnA lio are briefly discussed. 
  Reference    Z. Naturforsch. 53b, 673—678 (1998); received February 2 1998 
  Published    1998 
  Keywords    Intermetallic Compounds, Crystal Structure, X-Ray Data 
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 Identifier    ZNB-1998-53b-0673 
 Volume    53 
217Author    Francoanellite K^alschpo^cpo, Stefan Dicka, Thomas ZeiskebRequires cookie*
 Title    Francoanellit K3A15HP04)6(P04)2*12H20: Struktur und Synthese durch topochemische Entwässerung von Taranakit-I 2 H2O: Structure and Synthesis by Topochemical Dehydration of Taranakite  
 Abstract    Single crystals of synthetic francoanellite K3Al5(HP0 4)6(P0 4)2-12H20 could be obtained for the first time by topochemical dehydration of taranakite crystals. An X-ray structure de­ termination showed francoanellite to be the mineral with the second longest crystallographic axis described hitherto. Crystal data: space group R3c, a = 869.0(2), c = 8227(1)pm, Z = 6 , R g = 0.042. Francoanellite is a layer structure mineral having six layers of composition [K3Al5(HP04)6(P04)2(H2 0)i2], connected by hydrogen bonds. The rigid layer is formed by columns of corner sharing hydrogen phosphate tetrahedra and AIOö-octahedra which are inter­ connected by additional six-coordinated A1 ions. In trigonal holes of the layer orthophosphate ions are situated. The structure of francoanellite is very similar to the structure of taranakite K3H6Al5(P04)8-18H20 which has planar water interlayers between the Al-phosphate layers. A neutron scattering experiment with subsequent Rietveld refinement of the powder pattern gave the H-atom positions. Hydrogen bonds in francoanellite are formed within the rigid layers and between them. During the reaction taranakite —► francoanellite crystals in an intermediate stage of dehy­ dration could be obtained. From the c-axis of 8858 pm and one-dimensional electron density projections it can be proposed that in these crystals every second water interlayer was lost and a first order staging product of the deintercalation of water from taranakite was formed. 
  Reference    Z. Naturforsch. 53b, 711—719 (1998); eingegangen am 2. März 1998 
  Published    1998 
  Keywords    Crystal Structure, Neutron Scattering, Francoanellite, Taranakite, Topochemical Reaction 
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 Identifier    ZNB-1998-53b-0711 
 Volume    53 
218Author    Andreas Mommertz, Roland Leo, Werner Massa, Kurt DehnickeRequires cookie*
 Title    Uber die Reaktion von Bis(f-butylamino)dimethylsilan mit Titantetrachlorid. Kristallstrukturen des Imido-Komplexes [TiCl2 (N-CMe3 )(H2 N-CMe3 )(CH3CN)]2 und des Ketimido-Komplexes [TiCl3 {NC(Me)N(H)CMe3}(CH3CN)2 ]  
 Abstract    On the Reaction of Bis(f-butylamino)dimethylsilane with Titanium Tetrachloride. Crystal Structures of the Imido Complex [TiCl->(N-CMe3)(H-,N-CMe3)(CH3CN)]2 and of the Ketimido Complex [TiCl3{NC(Me)N(H)CMe3}(CH3CN)2] The reaction of bis(f-butylamino)dimethylsilane with titanium tetrachloride in dichloro­ methane solution leads to a mixture of compounds from which the imido complex (H3N-CMe3)2[TiCl3(N-CMe3)]2 (1) and by extraction of the residue with acetonitrile the imido complex [TiCl2(N-CMe3)(H2N-CMe3)(CH3CN)]2 (2) can be isolated. 1 reacts with acetonitrile to give the ketimido complex [TiCl3{NC(Me)N(H)CMe3}(CH3CN)2] (3). According to crystal structure determinations 2 consists of centrosymmetric dimeric molecules containing TiCl2Ti bridges, the N-CMe3~ ligands being in equatorial positions with TiN bond lengths of 168.8(4) pm which corresponds to double bonds. In the monomeric complex 3 the chloro ligands are in meridional positions of the distorted octahedrally coordinated titanium atom with a TiN bond length of 175.7(2) pm of the ketimido ligand. 
  Reference    Z. Naturforsch. 53b, 887—892 (1998); eingegangen am 27. April 1998 
  Published    1998 
  Keywords    Titanium, Imido Complex, Ketimido Complex, Crystal Structure 
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 Identifier    ZNB-1998-53b-0887 
 Volume    53 
219Author    Werner Urland, Helmut PersonRequires cookie*
 Title    Zur Kristallstruktur von Ho2Se3 On the Crystal Structure of Ho2Se3  
 Abstract    Starting from HoSe2_ t powder and holmium metal bright brownish-yellow, plate-like single crystals of Ho2Se3 could be prepared by chemical transport with A1C13. Holmium sesquiselenide crystallizes in the Sc2S3-type structure, space group Fddd, with lattice constants a = 1140,7(2), b -812,6(1) and c = 2423,9(3) pm. 
  Reference    Z. Naturforsch. 53b, 900—902 (1998); eingegangen am 9. April 1998 
  Published    1998 
  Keywords    Holmium Sesquiselenide, Chemical Transport, Crystal Structure 
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 Identifier    ZNB-1998-53b-0900 
 Volume    53 
220Author    Isabel Díaza, Vicente Fernández, José Luis, M. Artínezb, Lothar Beyer0, Astrid Pilzd, Ulrich MüllerdRequires cookie*
 Title    Thermochrome Chloro-und Bromocuprate  
 Abstract    [C(NH2)3]2[CuBr4], (H3CC2N2SNH3)2[Cu2Br6], (C7N3H14)2[CuC14], (C7N3H14)2[CuBr4], [(Cl, Br)C3N2H6][CuCl3OH2] und (BrC3N2H6)2[CuBr4] Thermochromic Chloro-and Bromocuprates: [C(NH2)3]2CuBr4, (H3CC2N9SNH3)2[Cu2Br6], (C7N 3H 14)2[CuC14], (C7N3H 14)2[CuBr4], [(Cl, Br)C3N2H6][CuCl3OH2] and (BrC3N2H6)2[CuBr4] CuCl2 and CuBr2 were reacted in water-ethanol solutions containing HC1 or HBr, re­ spectively, with the following organic bases or their chlorides or bromides: guanidine (1), 2-amino-5-methyl-l,3,4-thiadiazol (2), hexahydro-2//-pyrimidine-(1,2A)-pyrimidine (3), and 2-hydrazino-2-imidazoline (4). With 1 and 3 the tetrahalocuprates (lH)2[CuBr4], (3H)2[CuCl4] and (3H)2[CuBr4] were obtained having flattened tetrahedral anions. 2 and CuBr2 form (2H)2[Cu2Br6], with nearly planar [Cu2Br6]2-ions that are associated to chains with square-pyramidal coordination of Cu. 2 and CuCl2 yield the hydrate (2H)C1H20 . 4 undergoes substitution of the hydrazine group for halogen, yielding the 2-halo-2-imidazolinium salts (5H)0 2(6H)o,8[CuCl3OH2] and (6H)2[CuBr4] in addition to [H3NCH2CH2NH3][CuCl4] (5 = 2-chloro-, 6 = 2-bromo-2-imidazoline). The planar [CuCl3(OH2)]_ ions are associated to chains. Crystal structure determinations were performed with (lH)2[CuBr4], (2H)2[Cu2Br6], (3H)2[CuCl4], (5H)0 2(6H)o 8[CuCl3OH2] and (6H)2[CuBr4]; the latter three at 298 K and at 166 K or 173 K. The known crystal structure of [H3N(CH2)2NH3][CuCl4] was redetermined at 166 K. In all cases small differences of bond lengths and bond angles are observed between room temperature and low temperature. The magnetic properties and electrospray mass spectra were measured. The products show thermochromic behavior. 
  Reference    Z. Naturforsch. 53b, 933—938 (1998); eingegangen am 6. Mai 1998 
  Published    1998 
  Keywords    Chloro Cuprates, Bromo Cuprates, Crystal Structures, Thermochromism 
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 Identifier    ZNB-1998-53b-0933 
 Volume    53 
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