| | 61 | Author
| U. Steiner, W. Reichelt | Requires cookie* | | | Title
| Zum System Ca/Mo/O: Phasendiagramm, Synthese und Charakterisierung der ternären Verbindungen On the System Ca/Mo/O: Phase Diagram, Synthesis and Characterization of Ternary Compounds  | | | | Abstract
| The phase diagram of the ternary system Ca/Mo/O has been determined. Powder samples of the ternary compounds CaM o04, CaM o03, CaMo50 8, Ca16 5Mo,3 5O40 and Ca5 45Moi80 32 were prepared by solid state reactions. Rietveld analysis based on powder X-ray diffraction data shows that the compound CaMo50 8 has monoclinic structure (P2,/c) with a = 7.549, b = 9.064, c = 9.974 A, 3 = 110.04°. CaMo.O*, Ca I*. <Moit sOjo and Ca« 4sMoieO-i9 are semiconductors over the temperature range 75 to 300 K. | | | |
Reference
| Z. Naturforsch. 52b, 1169—1174 (1997); eingegangen am 14. August 1997 | | | |
Published
| 1997 | | | |
Keywords
| Calcium Molybdate, Phase Diagram, Synthesis, Crystal Structure, Electric Properties | | | |
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| default:Reihe_B/52/ZNB-1997-52b-1169.pdf | | | | Identifier
| ZNB-1997-52b-1169 | | | | Volume
| 52 | |
| 62 | Author
| Joachim Pickardt, Sven Wiese, Pirka Wischlinski | Requires cookie* | | | Title
| Reaktionen von Cadmium-und Quecksilber(II)halogeniden und -pseudohalogeniden mit Kronenethern: Kristallstrukturen der Komplexe von Benzo-18-krone-6 mit CdX2 und HgX2 (X = CI, Br) und von Dibenzo-18-krone-6 mit Hg(CN)2 Reactions of Cadmium and Mercury(II) Halides and Pseudohalides with Crown Ethers: Crystal Structures of the Complexes of Benzo-18-crown-6 with CdX2 and HgX2 (X = Cl, Br) and of Dibenzo-18-crown-6 with Hg(CN)2 | | | | Abstract
| The reactions of benzo-18-crown-6 with MeX2 (Me = Cd, Hg; X = Cl. Br), and of dibenzo-18-crown-6 with Hg(CN)2 afford the compounds [Me(benzo-18-crown-6)X2] (1-4) and [Hg(dibenzo-18-crown-6)(CN)2 (5), resp., the crystal structures of which were determined. They consist of isolated neutral molecules, the crystalline Cd complexes and 5 contain one molecule of water of crystallization per formula unit, which however is not coordinated to the metal atom. The metal atoms are coordinated by the six O atoms of the ligands and the two halide atoms, or the two CN groups for 5, resp., the coordination being more unsymmetrical for the benzo than for the dibenzo ligand. | | | |
Reference
| Z. Naturforsch. 52b, 1296—1300 (1997); eingegangen am 11. August 1997 | | | |
Published
| 1997 | | | |
Keywords
| Crown Complexes, Cadmium Halides, Mercuric Halides, Mercuric Cyanide, Crystal Structure | | | |
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| default:Reihe_B/52/ZNB-1997-52b-1296.pdf | | | | Identifier
| ZNB-1997-52b-1296 | | | | Volume
| 52 | |
| 63 | Author
| StefanD. Icka, Gisbert Großmannb, G. Isela, Ohm Sb, Thom As Zeiskec | Requires 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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| default:Reihe_B/52/ZNB-1997-52b-1439.pdf | | | | Identifier
| ZNB-1997-52b-1439 | | | | Volume
| 52 | |
| 64 | Author
| Angela Bayler, Andreas Bauer, Hubert Schmidbaur | Requires 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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| default:Reihe_B/52/ZNB-1997-52b-1477.pdf | | | | Identifier
| ZNB-1997-52b-1477 | | | | Volume
| 52 | |
| 65 | Author
| R. Pöttgen, K. H. Wachtmann, W. Jeitschko, A. Lang, T. Ebel | Requires 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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| default:Reihe_B/52/ZNB-1997-52b-0231.pdf | | | | Identifier
| ZNB-1997-52b-0231 | | | | Volume
| 52 | |
| 66 | Author
| Z. Naturforsch | Requires 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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| default:Reihe_B/52/ZNB-1997-52b-0237.pdf | | | | Identifier
| ZNB-1997-52b-0237 | | | | Volume
| 52 | |
| 67 | Author
| W. Preetz, A. Krull | Requires 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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| default:Reihe_B/52/ZNB-1997-52b-0315.pdf | | | | Identifier
| ZNB-1997-52b-0315 | | | | Volume
| 52 | |
| 69 | Author
| T. Koch, W. Preetz | Requires 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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| default:Reihe_B/52/ZNB-1997-52b-0939.pdf | | | | Identifier
| ZNB-1997-52b-0939 | | | | Volume
| 52 | |
| 70 | Author
| K. Dallmann, W. Preetz | Requires 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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| default:Reihe_B/52/ZNB-1997-52b-0965.pdf | | | | Identifier
| ZNB-1997-52b-0965 | | | | Volume
| 52 | |
| 72 | Author
| Michael Feista, Sergej Trojanov3, Anja Stiewe3, Erhard Kemnitz3, Ralf Kunzeb | Requires 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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| default:Reihe_B/52/ZNB-1997-52b-1094.pdf | | | | Identifier
| ZNB-1997-52b-1094 | | | | Volume
| 52 | |
| 73 | Author
| Karl Hensen3, Frank Gebhardta, Michael Bolteb | Requires 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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| default:Reihe_B/52/ZNB-1997-52b-1491.pdf | | | | Identifier
| ZNB-1997-52b-1491 | | | | Volume
| 52 | |
| 74 | Author
| T. Koch, W. Preetz | Requires 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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| default:Reihe_B/52/ZNB-1997-52b-1165.pdf | | | | Identifier
| ZNB-1997-52b-1165 | | | | Volume
| 52 | |
| 75 | Author
| A. R. Ofial, S.-Q Dou, V. G. Krishnan, H. Paulus, H. Fuess, Al Weiss | Requires cookie* | | | Title
| X-Ray and 35 C1 NQR Studies on the Trichloroacetyl Group in Covalent and Ionic Compounds of L-Valine and DL-Valine | | | | Abstract
| The crystal structures and 35 C1 NQR of trichloroacetyl-DL-valine (1), trichloroacetyl-L-valine (2), as well as the salts of trichloroacetic acid with DL-valine (3) and L-valine (4) have been investigated. Crystal data are for (1): Monoclinic, C2/c, a= 15.835(4) Ä, b= 10.481 (3) Ä, c = 14.046(4) A, /? = 103.28(1), Z = 8; (2): Orthorhombic, P2 1 2 1 2 1 , a = 12.117(3) Ä, 6=10.896(3) Ä, c= 8.718(2) Ä, Z = 4; (3): Triclinic, PI, a= 17.269(3) Ä, 6 = 8.504(3) Ä, c = 10.427(4) A, a = 105.38(2), £ = 96.98(2), y = 96.24(2), Z = 2; (4): Monoclinic, P2 1? a = 10.378(4) A, 6 = 20.349(8) A, c= 11.890(5) A, B = 95.28(2), Z = 8. The onset of rotational motion within the trichloroacetyl groups bleaches out 35 C1 NQR lines between 115 K and 185 K for (l)-(4). While TCA-L-valine (1), TCA-DL-valine (2), and TCA*) • DL-valine (+) (3) do not show any phase transition in the temperature range 77 K to 295 K, TCA <_) • L-valine (+) (4) shows more than one phase transition above 77 K before the three NQR signals bleach out at 164 K. | | | |
Reference
| Z. Naturforsch. 52a, 249—258 (1997); received August 30 1996 | | | |
Published
| 1997 | | | |
Keywords
| 35 C1 NQR study, trichloroacetyl, valine, crystal and molecular structure | | | |
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| default:Reihe_A/52/ZNA-1997-52a-0249.pdf | | | | Identifier
| ZNA-1997-52a-0249 | | | | Volume
| 52 | |
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