Go toArchive
Browse byFacets
Bookbag ( 0 )
'X Ray' in keywords Facet   Publication Year 1978  [X]
Results  17 Items
Sorted by   
Section
Publication Year
1978[X]
1Author    EdwardW. Abel, StuartA. Mucklejohn, T.Stanley Cameron, RuthE. CordesRequires cookie*
 Title    The Dimeric Phosphinimine Complex [CdI2(HN: PPh3)2]2 Containing N-H --I Hydrogen Bonds  
  Reference    Z. Naturforsch. 33b, 339—340 (1978); received December 5 1977 
  Published    1978 
  Keywords    X-ray, Crystal Structure, Phosphinimine 
  Similar Items    Find
 DEBUG INFO      
 TEI-XML for    default:Reihe_B/33/ZNB-1978-33b-0339_n.pdf 
 Identifier    ZNB-1978-33b-0339_n 
 Volume    33 
2Author    W. Stoeger, A. RabenauRequires cookie*
 Title    Tl6Ag2Iio9 ein Polyiodid mit Ag2-Paaren Darstellung, Eigenschaften und Kristallstruktur Tl6Ag2Iio, a Polyiodide with Ag2 Pairs Preparation, Properties, and Crystal Structure  
 Abstract    TleAg2Iio forms hexagonal crystals with metallic luster. Under its own I2-pressure the m.p. is 302 °C. In vacuum or under inert gas TleAg2Iio decomposes above 170 °C forming 1 mole of I2. The space group is P62c with the lattice constants a = 10.480 A, c = 13.415 A and Z = 2. TleAg2Iio is built up by a framework of TIöIö with channels parallel to the c-axis. These channels contain Ag2 pairs with an Ag-Ag distance of 2.98 A and I| _ -polyiodide ions, respectively. 
  Reference    Z. Naturforsch. 33b, 740—744 (1978); eingegangen am 21. April 1978 
  Published    1978 
  Keywords    X-ray, Structure Determination, Polyhalides 
  Similar Items    Find
 DEBUG INFO      
 TEI-XML for    default:Reihe_B/33/ZNB-1978-33b-0740.pdf 
 Identifier    ZNB-1978-33b-0740 
 Volume    33 
3Author    G. Struckmeier, J. Engel, U. ThewaltRequires cookie*
 Title    Molekül-und Kristallstruktur des 5.5' -Diethoxycarbonyl-3.3' -diethyl-4.4' -dimethyl-pyrromethen-hydrobromids Crystal and Molecular Structure of 5,5'-Diethoxycarbonyl-3,3'-chethyl-4,4'-cÜmethyl-pyiTomethene Hydrobromide  
 Abstract    The crystal and molecular structure of the title compound has been determined by X-ray diffraction. The compound possesses an (almost) planar Z configuration. The ions form ion pairs in the solid state: each bromide anion is connected via two hydrogen bonds with a cation. The crystal data are: space group P2i/n with Z = 4; cell dimensions a = 14.097(2), b = 11.591(2), c = 14.133(3) A, ß = 106,22(2)°. 
  Reference    Z. Naturforsch. 33b, 753—755 (1978); eingegangen am 12. April 1978 
  Published    1978 
  Keywords    Pyrromethenes, X-ray, Molecular Structure 
  Similar Items    Find
 DEBUG INFO      
 TEI-XML for    default:Reihe_B/33/ZNB-1978-33b-0753.pdf 
 Identifier    ZNB-1978-33b-0753 
 Volume    33 
4Author    Dieter WeberRequires cookie*
 Title    CHsNHsSnBraJa-z = 0-3), a Sn(II)-System with Cubic Perovskite Structure  
 Abstract    CH3NH3SnBr^l3 -.x [x = 0—3) has the cubic perovskite structure with the unit cell parameters a = 5.89 A {x = 3), a = 6.01 A (x = 2) and a = 6.24 A (x = 0) and Z = 1. The compounds show intense colour and conducting property. The U9 Sn Mössbauer data are consistent with the high symmetry environment of the Sn(II)-ion. A bonding model, using a "p-resonance-bonding", can explain the properties of the cubic system. The synthesis is described. 
  Reference    Z. Naturforsch. 33b, 862—865 (1978); eingegangen am 5. Mai 1978 
  Published    1978 
  Keywords    Synthesis, X-ray, Mössbauer Spectra 
  Similar Items    Find
 DEBUG INFO      
 TEI-XML for    default:Reihe_B/33/ZNB-1978-33b-0862.pdf 
 Identifier    ZNB-1978-33b-0862 
 Volume    33 
5Author    Cyclic Diazastannylenes, Iii, M. VeithRequires cookie*
 Title    Cyclische Diazastannylene, DI 1 Die Kristall-und Molekülstruktur der monoklinen Phase von 1.3-Di-feri-butyl-2.2-dimethyl-1.3.2.4A 2 -diazasilastannetidin The Crystal and Molecular Structure of the Monoclinic Phase of l,3-Di-feri-butyl-2,2-dimethyl-l,3,2,4A 2 -diazasilastannetidine  
 Abstract    The crystal and molecular structure of the monoclinic phase of l,3-di-£eri-butyl-2,2-dimethyl-l,3,2,4A 2 -diazasilastannetidine has been determined from three-dimensional X-ray data collected on a two-circle diffractometer at —120 °C (MoKa radiation, 2623 re-flexions, R — 0,050). The crystals are monoclinic, space group C 2/c, with cell dimensions a = 10.655(5), b = 25.75(1), c = 17.33(1) A, ß = 106.8(1)° and Z = 12. Four monomeric (crystal site symmetry 2 (C2)) and four dimeric units (crystal site symmetry I (Cj)) are present in the structure interacting over tin-tin (3.68 A). Remarkable are the very short Sn-N bond (2.09 A) in the monomer and the donation bond Sn-N (2.39 Ä) in the dimer. The coordination of the tin atoms in the different units is discussed in detail. 
  Reference    (Z. Naturforsch. 33b, 7—13 [1978]; eingegangen am 5. September/6. Oktober 1977) 
  Published    1978 
  Keywords    Diazastannylenes, X-ray, Molecular Structure, Crystal Structure 
  Similar Items    Find
 DEBUG INFO      
 TEI-XML for    default:Reihe_B/33/ZNB-1978-33b-0007.pdf 
 Identifier    ZNB-1978-33b-0007 
 Volume    33 
6Author    Hk Müller-Buschbaum, M. HarderRequires cookie*
 Title    Zur Kenntnis von Ba2Fe2 Fe9 3 Aln034 About Ba2Fe2 2+ Fe9 3+ Alii034  
 Abstract    Single crystals of the compound Ba2FenAln034 were prepared by solid state reac-tion (1700 °C) of Ba0-Fe203-Al203 mixtures. The crystal structure was investigated by X-rav data (space group D6h-P63/mmc, lattice constants: a = 565.3, c = 2281.0 pm). Ba2FenAln034 is isotypic with Na20 • 11 AI2O3, the structure of)S-alumina. 
  Reference    Z. Naturforsch. 33b, 146—148 (1978); eingegangen am 8. Dezember 1977 
  Published    1978 
  Keywords    Barium, Iron, Aluminium, X-ray, Crystal Structure 
  Similar Items    Find
 DEBUG INFO      
 TEI-XML for    default:Reihe_B/33/ZNB-1978-33b-0146.pdf 
 Identifier    ZNB-1978-33b-0146 
 Volume    33 
7Author    Herbert Binder, Dieter SellmannRequires cookie*
 Title    Röntgen-photoelektronenspektroskopische Untersuchungen an Pentacarbonyl- Chrom-und -Wolfram-Komplexen mit Stickstoffliganden c X-ray Photoelectron Studies of Pentacarbonyl Chromium and Tungsten Complexes with Nitrogen Ligands  
 Abstract    The ionization energies of some chromium and tungsten pentacarbonyl complexes of the type [M(CO)5] xL (L = N2H2, N2H4, NH3; x = 1 or 2 for N2H4 or a; = 1 for N2H2) are reported. The results are discussed in terms of the effects of tr-donor and 7r-acceptor bonds on XPS data. Satellite lines, which can be explained in terms of a shake-up process, give information about the nature of the metal-ligand bond. These shake-up processes are, to a large extent, specific to the atoms of the acceptor groups. The spectroscopic and chemical importance of multi-peak structures of XPS bands is emphasised. 
  Reference    Z. Naturforsch. 33b, 173—179 (1978); eingegangen am 21. Dezember 1977 
  Published    1978 
  Keywords    X-ray, PE Spectra, Monosubstituted Pentacarbonyls, Chromium, Tungsten 
  Similar Items    Find
 DEBUG INFO      
 TEI-XML for    default:Reihe_B/33/ZNB-1978-33b-0173.pdf 
 Identifier    ZNB-1978-33b-0173 
 Volume    33 
8Author    HeinzP. Fritz, Helmut Gebauer, Peter Friedrich, Peter Ecker, Reinhold Artes, Ulrich SchubertRequires cookie*
 Title    Elektrochemische Synthesen, XIV [1] Radikalkation-Salze des Naphthalins Electrochemical Syntheses, XIV [1]. Radical Cation Salts of Naphthalene  
 Abstract    By anodic oxidation of naphthalene in H2CCI2/O.O2 m Bu4NPF6 at —45 °C dark red-violet crystals of (CioHshPFö can be obtained by electrocrystallisation. They are stable at low temperatures, however, decompose on warming. In solution and in the poly-crystalline state these radical cation salts show only narrow e.p.r. signals without h.f.s. The specific conductivity of a polycrystalline pellet at room temperature was determined to be 0.12 ±0.046 Ohm -1 cm -1 . The structure determination of (CioHs^PFe yielded the tetragonal space group P42/n, Z = 2, a = b = 1156(2), c = 640(1) pm. Patterson synthesis and difference Fourier analyses showed the compound to have a columnar stacking of CioHg units the long molecular axes of which are twisted alternately by 90° around a screw axis in c-direction, and the molecular planes of which are 320 pm apart. The PFß -ions have four nearest CioHs neighbours lying in pairs in parallel planes 63 pm above and below that plane of PF6~ perpendicular to the c-axis and containing a PF4 group. This is the first established case for a columnar structure of a pure hydrocarbon radical cation. (CIOH8)2AsF6 is isomorphous. 
  Reference    Z. Naturforsch. 33b, 498—506 (1978); eingegangen am 21. Februar 1978 
  Published    1978 
  Keywords    Naphthalene Radical Cation, X-ray, Columnar Structure, Conductivity 
  Similar Items    Find
 DEBUG INFO      
 TEI-XML for    default:Reihe_B/33/ZNB-1978-33b-0498.pdf 
 Identifier    ZNB-1978-33b-0498 
 Volume    33 
9Author    Tetraphenylphosphonium-Isopolymolybdates, Roger Grase, Joachim FuchsRequires cookie*
 Title    Über Tetraphenylphosphonium-Isopolymolybdate  
 Abstract    From acidified sodium molybdate solutions mixtures of two polymolybdates are precipitated by addition of tetraphenylphosphonium ions. The pure compounds obtainable by separation with selective organic solvents were identified analytically and by their vibrational spectra as octamolybdate, [P(C6Hs)4]4Mo8026, with "Lindqvist structure" and as hexamolybdate, [P(C6Hs)4Mo60i9. They are characterized by their UV-VIS spectra and X-ray powder patterns. The precipitation of the hexamolybdate from strong acidic solution can be used analytically for the determination of molybdenum. 
  Reference    Z. Naturforsch. 33b, 533—536 (1978); eingegangen am 20. Januar 1978 
  Published    1978 
  Keywords    Isopolymolybdates, Preparation, Vibrational Spectra, X-ray, UV 
  Similar Items    Find
 DEBUG INFO      
 TEI-XML for    default:Reihe_B/33/ZNB-1978-33b-0533.pdf 
 Identifier    ZNB-1978-33b-0533 
 Volume    33 
10Author    Hans-Dieter Hausen, Herbert Binder, Wolfgang SchwarzRequires cookie*
 Title    Die Kristallstruktur von Tetramethylstiboniumtetrachlorogallat [(CH3)4Sb] + [GaCl4]- The Crystal Structure of Tetramethylstibonium Tetrachlorogallate [(CH3)4Sb]+[GaCl4]  
 Abstract    Tetramethylstiboniumtetrachlorogallate crys-tallizes in the hexagonal space group P6smc with two formula units per cell. The lattice constants are a=b = 768.8 pm and c= 1251.2 pm. The structure shows isolated cationic and anionic tetrahedra, which are only slightly distorted. The averaged bond lengths are: Sb-C 212.6 pm and Ga-Cl 217.2 pm. In good agreement with the short Ga-Cl distance (the shortest of all compounds ((CH3)nGaCl4_B)~; n = 1-3) are the measured ionization energies of Ga-3d-electrons and the calculated Pauling Qp-values. 
  Reference    Z. Naturforsch. 33b, 567—569 (1978); eingegangen am 1. März 1978 
  Published    1978 
  Keywords    Tetramethylstibonium, Tetrachlorogallate, Crystal Structure, X-ray 
  Similar Items    Find
 DEBUG INFO      
 TEI-XML for    default:Reihe_B/33/ZNB-1978-33b-0567_n.pdf 
 Identifier    ZNB-1978-33b-0567_n 
 Volume    33 
11Author    T.Stanley Cameron, RuthE. Cordes, FlorenceA. JackmanRequires cookie*
 Title    Synthesis and Crystal Structure of iu-Oxo-bis(phosphenyl-or^o-toluidide)  
 Abstract    The title compound was synthesised in an attempt to prepare phosphenyl-tri-orJ/io-toluidine, X-ray crystallographic studies show that it contains a P-O-P bridge with extensively hydrogen bonding between -^P=0 and H-N < groups. The P-N bond lengths are different and this can be attributed to some combination of hydrogen bonding and varying p Z7-d Z7 interactions along the bond. 
  Reference    Z. Naturforsch. 33b, 728—730 (1978); received April 21 1978 
  Published    1978 
  Keywords    X-ray, Crystal Structure, Phosphorus-Nitrogen Bond Lengths 
  Similar Items    Find
 DEBUG INFO      
 TEI-XML for    default:Reihe_B/33/ZNB-1978-33b-0728.pdf 
 Identifier    ZNB-1978-33b-0728 
 Volume    33 
12Author    R. Hansel, J. Schulz, A. Pelter, M. T. Ayoub, R. ReinhardtRequires cookie*
 Title    Über das Verhalten von 5-Hydroxy-Kawainen gegen Alkali Behaviour of 5-Hydroxykawain Derivatives under Mild Alkaline Conditions  
 Abstract    Treatment of cis-dihydroxykawainol = rel (5R, 6R)-(±)-5-hydroxy-4-methoxy-6-phenylethyl-5,6-dihydro-2H-pyran-2-on (eis-3) with potassium hydroxide in methanol (2.5%, 1 h, room temp.) leads to a 1:1 mixture of the corresponding erythro-butenolide 7 and threo-butenolide 8 by a ring contraction process that may have analogies with the biosynthesis of the piperolides 15. Trans-3 gives the same yields (about 70%) of the same mixture (7 and S), which can be separated by silica-gel columns. Starting from mixtures of cis-5-hydroxykawain (C?Ö'-4) and Zrans-5-hydroxykawain (trans-4), there were prepared and described the two epimeric dehydro-butenolides 9 and 10 and their O-methyl-derivatives 11 and 12. The threo-and erythro-series show consistant differences between ,75,6 and the X H NMR spectra. The constitution and configuration of (±)-erythro-5-(l-methoxy-3-phenylallyl)-4-methoxy-2(5H)-furanone (11) were established by X-ray analysis. 
  Reference    Z. Naturforsch. 33b, 1020—1025 (1978); eingegangen am 5. Juni 1978 
  Published    1978 
  Keywords    5-Hydroxykawain Derivatives, Erythrobutenolides, Threobutenolides, X-ray, Piperolides 
  Similar Items    Find
 DEBUG INFO      
 TEI-XML for    default:Reihe_B/33/ZNB-1978-33b-1020.pdf 
 Identifier    ZNB-1978-33b-1020 
 Volume    33 
13Author    Y. Sudhakara Babu, H. Manohar, T.Stanley Cameron, RobertA. ShawRequires cookie*
 Title    a Novel Conformation of the NPPh3 Group  
 Abstract    The X-ray crystal structure of heptachloro-(triphenylphosphazenyl)cyclotetraphosphaza-tetraene N4P4Cl7(NPPh3) reveals a novel con-formation (tending to Type III) of the tri-phenylphosphazenyl group with respect to the adjacent ring segment. This observation is contrasted with the structure of N3P3Cl5(NPPh3) where a Type I conformation is observed. 
  Reference    Z. Naturforsch. 33b, 682—683 (1978); received March 13 1978 
  Published    1978 
  Keywords    Heptachloro(triphenylphosphazenyl)cyclotetra-phosphazatetraene, X-ray, Crystal Structure, Triphenylphosphazenyl Group Conformation 
  Similar Items    Find
 DEBUG INFO      
 TEI-XML for    default:Reihe_B/33/ZNB-1978-33b-0682_n.pdf 
 Identifier    ZNB-1978-33b-0682_n 
 Volume    33 
14Author    Markus Wieber, Christian Burschka, Ulrich BaudisRequires cookie*
 Title    Darstellung und Molekülstruktur von 2-Methylthio-l,3,2-benzodithiastibol Preparation and X-ray Structure of 2-Methylthio-l,3,2-benzodithiastibole  
 Abstract    Starting with SbCl3 and 1,2-benzenedithiol, one can easily obtain heterocyclic 2-chloro-1,3,2-benzodithiastibole [1], which, without iso-lation, can be treated with a solution of sodium methanethiolate to yield 2-methylthio-1,3,2-benzodithiastibole. Yellow crystals were obtain-ed by recrystallization from acetonitrile. The compound was found to be monomeric in ben-zene solution. The crystal structure was solved by means of X-ray diffraction methods and could be refined to an .R-value of 0.03 with 870 independent reflections observed. The monoclinic unit cell contains 4 formula units, the space group is P2i/c. The structure can be compared with that of 2-methoxi-l,3,2-benzodioxastibole, a prelimi-nary report of which has been given [2]. The compounds are, however, not isomorphous. Interactions between neighbouring molecules in the thiastibole seem to be significantly weaker than in the corresponding oxygen compound. Verbindungen des Typs R-M<^j^>R', M = P, As, 
  Reference    Z. Naturforsch. 33b, 1051—1052 (1978); eingegangen am 2. Juni 1978 
  Published    1978 
  Keywords    2-Methylthio -1, 3, 2 -benzodithiastibole, Preparation, X-ray 
  Similar Items    Find
 DEBUG INFO      
 TEI-XML for    default:Reihe_B/33/ZNB-1978-33b-1051_n.pdf 
 Identifier    ZNB-1978-33b-1051_n 
 Volume    33 
15Author    Y. Sudhakara Babu, H. Manohar, K. Ramachandran, S. S. KrishnamurthyRequires cookie*
 Title    The Crystal Structure of a Spirocyclic Cyclophosphazene N3P3(NM e2)4(NHCH2CH2NH) -Evidence for Intermolecular Hydrogen Bonding  
  Reference    Z. Naturforsch. 33b, 588—589 (1978); received February 21 1978 
  Published    1978 
  Keywords    Tetrakis(dimethylamino)(ethylenediamino)cyclotriphosphazene, X-ray, Crystal Structure, Spirocyclic Structure, Envelope Conformation 
  Similar Items    Find
 DEBUG INFO      
 TEI-XML for    default:Reihe_B/33/ZNB-1978-33b-0588.pdf 
 Identifier    ZNB-1978-33b-0588 
 Volume    33 
16Author    W. S. Sheldrick, J. A. Gibson, G.-V RöschenthalerRequires cookie*
 Title    The Crystal Molecular Structure of the Adduct of 2,2,2-Trifluoro-4,4,5,5-tetrakis(trifluoromethyl)-l,3,2A 5 -dioxaphospholane with Trimethylphosphine. A Strong P —» P Coordinate Bond  
 Abstract    The adduct of 2,2,2-trifluoro-4,4,5,5-tetrakis(trifluoromethyl)-1,3,2 A 5 -dioxaphospholane with trimethylphosphine crystallises in the orthorhombic space group Pbcm, Z = 4, with a — 11.018(2), b — 12.978(4), c= 11.607(2) A at —120 °C. The perfluoropinacolyl ring system lies in a crystallographic plane of symmetry. This ring conformation and the very long endocyclic C-C bond and average C-CF3 distances of respectively 1.59(1) and 1.59(1) A are presumably a consequence of very short F---F steric contacts. The P->P bond distance of 2.234(5) is very short for a coordinate bond being only 0.01-0.03 A longer than that typically observed for a a-bond. The tr-bond lengths to the hexacoordinate phosphorus are influenced by the nature of the Zrans-bond in the octahedron. 
  Reference    Z. Naturforsch. 33b, 1102—1 (1978); eingegangen am 22. Juni 1978 
  Published    1978 
  Keywords    X-ray, Hexacoordinate Phosphorus Adduct, Coordinate P-*P Distance Planar Perfluoropinacolyl Ring System, Long Endocyclic C-C Bond 
  Similar Items    Find
 DEBUG INFO      
 TEI-XML for    default:Reihe_B/33/ZNB-1978-33b-1102.pdf 
 Identifier    ZNB-1978-33b-1102 
 Volume    33 
17Author    M. VeithRequires cookie*
 Title    Cyclische Diazastannylene, II 1 Intermolekulare Lewis-Säure-Base-Addukte bei 1.3.2.4A 2 -Diazasilastannetidinen Cyclic Diazastannylenes, II 1 Intermolecular Lewis-Acid-Base Adducts of 1, 3,2,4A 2 -Diazasilastannetidines  
 Abstract    -diazasilastannetidines can be prepared as mono-mers (organyl = <erf-butyl) or dimers (organyl = isopropyl) in nonpolar solvents, depending on the organic nitrogen substituent. The formation of the dimer, which is due to an intermolecular Lewis-acid-base interaction of Sn(II) with nitrogen, can be initiated by solidification. When the tertf-butyl compound is cooled below 0 °C two crystalline modi-fications are found: a monoclinic phase (C 2/c; a= 10.655(5); b = 24.75(1); c = 17.334(9) Ä; ß = 106.9(1)°) and a triclinic phase (P I; a = 10.68(1); b = 13.51(1); c = 12.36(1) A; a = 96.2(1); ß = 102.6(1); y = 118.4(1)°). The crystal structures turn out to be built of dimeric and monomeric units in the first case and presumably only dimeric species in the second case. The isopropyl derivative crystallizes in the space group P 2i/b (a = 10.77(1); b= 12.14(2); c = 11.15(2) A; ß = 120.2(2)°) with only dimeric units being present, as in the liquid. Interrelationships between the three structures are discussed. 
  Reference    (Z. Naturforsch. 33b, 1—6 [1978]; eingegangen am 5. September/6. Oktober 1977) 
  Published    1978 
  Keywords    Diazastannylenes, Solid State, X-ray, Crystal Structure, NMR l, 3-Diorganyl-2, 2-dimethyl-I, 3, 2, 4A 2 
  Similar Items    Find
 DEBUG INFO      
 TEI-XML for    default:Reihe_B/33/ZNB-1978-33b-0001.pdf 
 Identifier    ZNB-1978-33b-0001 
 Volume    33