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'Crystal Structures' in keywords Facet   Publication Year 1997  [X]
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1997[X]
61Author    StefanD. Icka, Gisbert Großmannb, G. Isela, Ohm Sb, Thom As ZeiskecRequires cookie*
 Title    Aluminiumphosphate mit nichtzentrosymmetrischen Schicht-und Raumnetzstrukturen aus topologisch verwandten Motiven: 1. KA12(P 0 4)2(0H)*4H20 Aluminum Phosphates with Non-Centrosym metric Layer-and Framework-Structures o f Topologically Related Motifs  
 Abstract    KAl2(P04)2(0 H)-4H20 could be obtained by the reaction of gibbsite with a potassium-phosphate solution of pH = 5.5 at 333 K. A single crystal X-ray structure analysis showed that KAl2(P04)2(0 H)-4H20 is isotypic with the mineral minyulite. Crystal data: orthorhombic space group P b a l, a = 934.7(1), b = 982, 1 (1), c = 551,0(1) pm, Z = 2. It possesses dimeric units of Al-octahedra which are bridged by an OH-and two bidentate phosphate groups. The dimers are linked by phosphate to plane polar layers. Cavities in the layers are occupied by K ions. One corner of each phosphate tetrahedron is not connected to Al but accepts four hydrogen bonds from water molecules bound to Al of the adjacent layer. A powder neutron scattering experiment with KAl2(P04)2(0 D)-4D20 showed that four D atoms and P coordinate the hydrogen bond accepting O in KAl2(P04)2(0 D)-4D20 like a square pyramid. Analogous dimeric building units are found in the Al phosphate minerals minyulite and morinite; similar dimers of Fe octahedra occur in the mineral copiapite, a number of Fe containing enzymes and numerous synthetic iron complexes. High-resolution 31P solid-state NMR spectra show only one isotropic line at <5;so = —9.6 ppm and confirm the presence of one symmetry independent phosphorus site in the unit cell. In the 'H-MAS-NMR spectra the water molecules and the bridging OH groups show signals at 5.4 and 1.4 ppm, respectively. 
  Reference    Z. Naturforsch. 52b, 1439—1446 (1997); eingegangen am 9. September 1997 
  Published    1997 
  Keywords    Crystal Structure, Neutron Scattering, MAS NMR, Minyulite, Aluminium Phosphate 
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 Identifier    ZNB-1997-52b-1439 
 Volume    52 
62Author    Angela Bayler, Andreas Bauer, Hubert SchmidbaurRequires cookie*
 Title    Chiral Phosphine Ligands in the Structural Chemistry of Gold  
 Abstract    The reaction of chloro(dimethylsulfide)gold(I) with (2-hydroxybutyl)diphenylphosphine (L) (racemic mixture) in dichloromethane affords high yields of the racemic chiral complex (L)AuCl. Metathesis reactions with KBr or KI, respectively, in a two-phase solvent mix­ ture (CH2CI2/H2O) lead to a conversion into the corresponding bromide and iodide complexes (L)AuBr and (L)AuI. Treatment of silver chloride with the ligand L in acetonitrile yields the analogous 1:1 adduct (L)AgCl. The compounds have been characterized by their analytical and spectroscopic data, and the structures of (L)AuCl and (L)AuBr have been determined by single-crystal X-ray diffraction. The compounds build isomorphous crystal lattices (monoclinic, P2i/c) in which pairs of enantiomers (R-and S-configuration of L) are aggregated by two long hydrogen bonds between the hydroxyl group of the ligand and the halogen substituent of the neighbouring molecule. Cationic, linear two-coordinate 1:2 complexes (L)2Au+ X-(X = BF4, CIO4, SO3CF3) and (L)2Ag+ X-(X = BF4) are obtained in good yields by reaction of L with Me2SAuCl and AgX (molar ratio 2:1:1) or with AgBF4 (molar ratio 2:1), respectively. 31P NMR studies at variable temperature show an equilibrium between all possible stereoisomers (RR, SS, RS, SR) in solution with rapid ligand exchange at ambient temperatures. 
  Reference    Z. Naturforsch. 52b, 1477—1483 (1997); received October 14 1997 
  Published    1997 
  Keywords    Gold Complexes, Phosphane Complexes, Chiral Phosphanes, Crystal Structure, Diastereomers 
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 Identifier    ZNB-1997-52b-1477 
 Volume    52 
63Author    R. Pöttgen, K. H. Wachtmann, W. Jeitschko, A. Lang, T. EbelRequires cookie*
 Title    Er5Re2C7, Tm5Re2C7, and Lu5Re2C7 with Sc5Re2C7 Type, and Yb2ReC2 with Pr2ReC2 Type Structures  
 Abstract    ErsReiCy, TmsRe2C7, and LusReaC? were prepared by arc-melting of the elemental compo­ nents and subsequent annealing at 800 °C. ErsRe^Cy forms only after the annealing process, whereas the other two carbides were already present in the as cast samples. They crystallize with a ScsReiC? type structure, which was refined from single-crystal X-ray data of LusRe2C7: Cmmm, a = 791.44(5), b = 1418.08(8), c = 332.79(2) pm, Z = 2, R = 0.037 for 544 structure factors and 21 variable parameters. The structure contains linear centrosymmetric C3 units with a C-C bond length of 133(2) pm and isolated carbon atoms in octahedral coordination of four lutetium and two rhenium atoms. The rhenium atoms within the two-dimensionally infinite polymeric sheets [ReiC-tln are electronically saturated as is indicated by the diamagnetism and the semiconductivity of this carbide. Yf>2ReC2 was prepared by reacting the elements in a sealed tantalum tube with a high-frequency furnace. It crystallizes with a Pr2ReC2 type structure: Pnma, a = 645.91(6), b = 498.64(6), and c = 966.05(6) pm. Magnetic susceptibility measurements indicate the ytterbium atoms to be trivalent in this compound. 
  Reference    Z. Naturforsch. 52b, 231—236 (1997); received November 15 1996 
  Published    1997 
  Keywords    Crystal Structure, Magnetic Properties, Rare Earth Metal Rhenium Carbides, Polymeric Rhenium-Carbon Polyanions 
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 Identifier    ZNB-1997-52b-0231 
 Volume    52 
64Author    Z. NaturforschRequires cookie*
 Title    Zinn(IV)  
 Abstract    Komplexe mit diaciden Azo(hydrazono)verbindungen. Kristallstruktur von Bis[4-(2'-hydroxyphenylazo)-3-methyl-l-phenyl-pyrazol-5-onato(2-)]zinn(IV) Tin(IV) Complexes with Diacidic Azo(hydrazono) Compounds. Crystal Structure of Bis[4-(2'-hydroxyphenylazo)-3-methyl-l-phenyl-pyrazol-5-onato(2-)]tin(IV) Wolfgang Banße3, Tin(IV) complexes of diacidic azo and hydrazono compounds were synthesized by the reaction of these ligands with SnCl2acac2 and SnCl2 • 2H20 , respectively. The complexes were further characterized by Mössbauer spectroscopy. For bis[4-(2'-hydroxyphenylazo)-3-methyl-l-phenyl-pyrazol-5-onato(2-)]tin(IV) force field calculations have been performed and the crystal structure was determined by X-ray analysis. 
  Reference    Z. Naturforsch. 52b, 237—242 (1997); eingegangen am 16. Oktober 1996 
  Published    1997 
  Keywords    Tin(I V) Complexes, Diacidic Azo Compounds, Mössbauer Spectroscopy, Molecular Mechanics Study, Crystal Structure 
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 Identifier    ZNB-1997-52b-0237 
 Volume    52 
65Author    W. Preetz, A. KrullRequires cookie*
 Title    Kristallstrukturen, Schwingungsspektren und Normalkoordinatenanalysen von Tetrahalogenooxalatoosmaten (IV), [OsX4(ox)]2', X = Cl, Br, I Crystal Structures, Vibrational Spectra and Normal Coordinate Analyses of Tetrahalogenooxalatoosmates (IV), [OsX4(ox)]2~, X = Cl, Br, I  
 Abstract    The crystal structures of [(C5H5N)iC H 2][OsCl4(ox)] (monoclinic, space group I2/m, a = 10.260(5), b = 13.841(5), c = " 12.273(5) Ä, ß = 92.050(5)°, Z = 4), [(C5H5N)2CH2j[O sBr4(o x)]H 20(m onoclinic, space g ro u p P 2 ,/n ,a = 11.666(3),b = 11.591(5), c = 14.926(2) A, ß = 102.45(2)°, Z = 4) and [P(C6H5)4M O sI4(ox)]-2CH2C12 (triclinic, space group P i, a = 14.597(2), b = 11.9185(9), c = 22.5624(14) A, a = 80.284(8), ß = 78.903(8), 7 = 69.432(8)°, Z = 2) have been determined by single crystal X-ray diffraction analysis. The IR and Raman spectra of the three complexes were measured at room temperature. Using the molecular parameters of the X-ray determinations normal coordinate analyses based on a modified valence force field have been performed and the normal modes o f vibration are assigned. With a set of 25 force constants and taking into account the innerligand vibrations a good agreement between observed and calculated frequencies has been achieved. The valence force constants of the X-Os-X axis are fd(OsCl) = 1.77, fd(OsBr) = 1.48, fd(OsI)o= 1.0 mdyn/A, of the X'-Os-O* axes are fd(O sCl') = 1.88, fd(OsBr') = 1.6, fd(OsI') =1.1 mdyn/A and fd(OsO*) ranges from 2.7 to 2.8 mdyn/A. 
  Reference    Z. Naturforsch. 52b, 315—322 (1997); eingegangen am 27. November 1996 
  Published    1997 
  Keywords    Tetrachlorooxalatoosmate(IV), Tetrabromooxalatoosmate(IV), Tetraiodooxalatoosmate(IV), Crystal Structure, Vibrational Spectra 
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 Identifier    ZNB-1997-52b-0315 
 Volume    52 
66Author    OttoJ. Scherer, Markus Ehses, Gotthelf WolmershäuserRequires cookie*
 Title    Dinuclear Rhenium(II) Complex with cis Configuration of the Terminal Cl Atoms  
  Reference    Z. Naturforsch. 52b, 762—765 (1997); eingegangen am 26. Februar 1997 
  Published    1997 
  Keywords    Dinuclear Rhenium Complexes, c/s-Chloro, fx-Carbene, /<-Vinylidene Ligands, Crystal Structure 
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 Identifier    ZNB-1997-52b-0762_n 
 Volume    52 
67Author    T. Koch, W. PreetzRequires cookie*
 Title    Darstellung, n B-, 'H-NMR und Schwingungsspektren von 4-Aminopyridylundecahydro-c/oso-dodecaborat(l-) sowie Kristallstruktur von (Ph4As)[(4-(NH)-C5H4N)B12H11]*2CH3CN Synthesis, " B , 'H NM R and Vibrational Spectra o f 4-Aminopyridylundecahydro-c/oso- dodecaborate( 1-) and Crystal Structure o f (Ph4A s)[(4-(N H )-C5H4N )B 12H n ]-2CH3CN  
  Reference    Z. Naturforsch. 52b, 939—942 (1997); eingegangen am 9. Juni 1997 
  Published    1997 
  Keywords    4-Am inopyridylundecahydro-c7(wododecaborate(l-), Crystal Structure, " B NMR Data, 1H NMR Data, Vibrational Spectra 
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 Identifier    ZNB-1997-52b-0939 
 Volume    52 
68Author    K. Dallmann, W. PreetzRequires cookie*
 Title    Kristallstrukturen, Schwingungsspektren und Normalkoordinaten- analysen von cis-und ^rans-[OsX2(acac)2], X = Cl, Br, I Crystal Structures, Vibrational Spectra and Normal Coordinate Analyses of cis-and rrarcs-[OsX2(acac)2l, X = Cl, Br, I  
 Abstract    The crystal structures of frans-tOsCM acac)?] (triclinic, space group P i, a = 7.4114(5), 
  Reference    Z. Naturforsch. 52b, 965—974 (1997); eingegangen am 12. Mai 1997 
  Published    1997 
  Keywords    Crystal Structure, IR Spectra, Raman Spectra, Normal Coordinate Analysis, trans Influence 
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 Identifier    ZNB-1997-52b-0965 
 Volume    52 
69Author    Michael Feista, Sergej Trojanov3, Anja Stiewe3, Erhard Kemnitz3, Ralf KunzebRequires cookie*
 Title    Synthese, Kristallstrukturen und thermisches Verhalten von (trienH2)[Mn(H20)3X 3]X * H20 (X=Cl,Br)* Synthesis, Crystal Structures and Thermal Behavior of (trienH2)[Mn(H20 ) 3X 3]X * H20 (X=Cl,Br)  
  Reference    Z. Naturforsch. 52b, 1094—1102 (1997); eingegangen am 12. Mai 1997 
  Published    1997 
  Keywords    Triethylenediammonium Triaquatrichloromanganate(II) Chloride Monohydrate, Triethylene-diammonium Triaquatribromomanganate(II) Bromide Monohydrate, Crystal Structures, Hy­ drogen Bonding, Thermal Analysis, DTA-TG, TG-MS 
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 Identifier    ZNB-1997-52b-1094 
 Volume    52 
70Author    T. Koch, W. PreetzRequires cookie*
 Title    Darstellung, n B-, 13C -,1 H-NMR-und Schwingungsspektren  
 Abstract    von 2,2' -Bipyridylundecahydro-c/oso-dodecaborat(1-) sowie Kristallstruktur von (Ph4As)[(2,2-C10H8N2)B12Hn ] CH3CN Synthesis, n B, 13C, 'H NMR and Vibrational Spectra of 2 ,2 '-Bipyridyl-undecahydro-c/o5o-dodecaborate(l-) and Crystal Structure of (Ph4As)[(2 ,2 '-C10H8N2)B 12H 1 1 ]-CH3CN 
  Reference    Z. Naturforsch. 52b, 1165—1168 (1997); eingegangen am 17. Juli 1997 
  Published    1997 
  Keywords    2, 2'-Bipyridyl-undecahydro-c/oso-dodecaborate(l-), Crystal Structure, n B NMR Spectra, 1H NMR Spectra, 13C NMR Spectra, Vibrational Spectra 
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 Identifier    ZNB-1997-52b-1165 
 Volume    52 
71Author    Karl Hensen3, Frank Gebhardta, Michael BoltebRequires cookie*
 Title    Synthese und Kristallstrukturbestimmung von Additionsverbindungen aus Alkyldimethylbromsilanen und N-Trimethylsilylimidazol Syntheses and Crystal Structure Determination of Addition Compounds of Alkyldimethylbromosilanes and N-Trimethylsilylimidazole  
 Abstract    The bromosilanes RMe2SiBr (R = Me, Et, n-Pr and /-Pr) form ionic l:l-compounds with N-trimethylsilylimidazole (NTMSI), stable at room temperature. Crystals of the compounds with R = Et, n-Pr and i-Pr are obtained by sublimation. From the product of the reaction of 1,1-dibromosilacyclopentane with NTMSI single crystals of N,N'-bis(trimethylsilyl)imidazolium-bromide (R = Me) were obtained. In the new adducts both silicon atoms are tetracoordinated. 
  Reference    Z. Naturforsch. 52b, 1491—1496 (1997); eingegangen am 31. Juli 1997 
  Published    1997 
  Keywords    Alkyldimethylbromosilanes (alkyl = Me, Et, «-Pr and /-Pr), N-Trimethylsilylimidazole, Lewis-Acid-Base Adducts, Crystal Structure 
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 Identifier    ZNB-1997-52b-1491 
 Volume    52 
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