| | 1 | Author
| Barbara Balbach, Reinhold Alt, ManfredL. Ziegler | Requires cookie* | | | Title
| Structural Investigations on Four-Membered Ring Systems, III* Crystal and Molecular Structures of frattS-2,4-Bis(trimethylsilyl)-2,4-dihydro-l,3-dithietane- 1.1.3.3-tetroxide, 2,2,4,4-Tetramethyl-3-pyrrolidinocyclobutanone and 2.2.4.4-Tetramethyl-l-phenyl-3-pyrrolidinocyclobutanol  | | | | Abstract
| The molecular structures of the title compounds have been determined by X-ray methods. In the bis(trimethylsilyl) substituted dithietane the (CH3)3Si groups are in trans position; the C2S2-ring is planar. In the cyclobutanone the pyrrolidine group occupies an equatorial position, as does the phenyl group in the cyclobutanol. In the latter the hydroxyl group is trans to the pyrrolidine ring. The four-membered carbon rings are folded. | | | |
Reference
| Z. Naturforsch. 37b, 1005—1013 (1982); eingegangen am 6. April 1982 | | | |
Published
| 1982 | | | |
Keywords
| X-ray, Cyclobutanol, Dithietanetetroxide | | | |
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| default:Reihe_B/37/ZNB-1982-37b-1005.pdf | | | | Identifier
| ZNB-1982-37b-1005 | | | | Volume
| 37 | |
| 2 | Author
| Werner Kruppa, Dieter Bläser, Roland Boese, Günter Schmid | Requires cookie* | | | Title
| Heteronucleare Clustersysteme, XX [1] ^3-Bi8mutio-cyclo-tris(tricarbonyliridium) (3 Ir-Ir), BiIr3(CO)9 Darstellung und Strukturuntersuehung eines neuartigen Iridiumclusters Heteronuclear Cluster Systems, XX [1] iM3-Bismutio-cyclo-tris(tricarbonyliridium)(3Ir-Ir), BiIr3(C0)g - Synthesis and Structural Investigation of a Novel Iridium Cluster | | | | Abstract
| The synthesis of BiIr3(CO)9 is described. IR and mass spectroscopic data are discussed. The structure of BiIr3(CO)9 was solved by X-ray analysis. The structural data are discussed and compared with those of the related compounds Ir4(CO)i2 and Bi[Co(CO)4]3, respec-tively. | | | |
Reference
| Z. Naturforsch. 37b, 209—213 (1982); eingegangen am 29. September 1981 | | | |
Published
| 1982 | | | |
Keywords
| Iridium Cluster, Bismuth Cluster, Synthesis, X-ray | | | |
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| default:Reihe_B/37/ZNB-1982-37b-0209.pdf | | | | Identifier
| ZNB-1982-37b-0209 | | | | Volume
| 37 | |
| 3 | Author
| Werner Winter, AntonThomas Butters, Rieker, Yasuo Butsugan | Requires cookie* | | | Title
| Synthesis and Structure of l,2-Bis(2,4,6-tri-fert-butylphenyl)ethane | | | | Abstract
| The title compound 9, C38H62, was prepared by dehalogenation of 2,4,6-tri-£er£-butyl-benzyl chloride (7a). It crystallizes in the monoclinic space group C2/c with Z = 4. a = 10.923(7), b = 17.910(3), c = 17.395(3) A and ß = 91.87(3)° (the cell constants refer to 173 K). The structure was solved by direct methods and refined by full-matrix least squares to 7? = 0.073 for all 3853 reflexions (|Fo| > 0). On account of steric repulsions, the central ethane bond, which lies on a twofold crystallographic axis, is stretched to 1.567(4) A. Close packing of the molecules in layers parallel the ac-plane leads to boat-deformations of the benzene rings. Room-temperature data sets of weakly diffracting crystals [a = 10.948(0), b= 17.97(1), c= 17.52(2) and ß = 91.9(1)°] do not give rise to an artificial shortening of the central ethane bond of 9. Evidently, poor data quality or lack of resolution have not to be considered as an explanation for the unusual short ethane bond [1.47(3) A] in the first undamped hexaphenylethane [Stein, Winter, and Rieker (1978)]. Historical Background | | | |
Reference
| Z. Naturforsch. 37b, 855—862 (1982); received March 15 1982 | | | |
Published
| 1982 | | | |
Keywords
| X-ray, Steric Hindrance, Hindered Ethanes | | | |
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| default:Reihe_B/37/ZNB-1982-37b-0855.pdf | | | | Identifier
| ZNB-1982-37b-0855 | | | | Volume
| 37 | |
| 4 | Author
| Gabriela Weber | Requires cookie* | | | Title
| A 1:1 Host-Guest Complex between ('18-crown-6') and m-Nitroaniline: Mere Stoicheiometry or a Genuine 1:1 Adduct ? | | | | Abstract
| The stoicheiometrically 1:1 adduct of 1,4,7,10,13,16-hexaoxa-cyclooctadecane with m-nitroaniline, C18H30N2O8, Mr = 402.45, crystallises from toluene in red-orange prisms, (probable) space group Pi, a = 801.8(3), b = 920.4(3), c = 1403.3(4) pm, a = 80.40(4), ß = 79.79(4), y = 85.95(3)°, V = 1.07910 nm 3 , Z = 2, dcaic. = 1.238 Mgm~ 3 . Structure refinement converged at R = 0.060 (Rw = 0.002) for 2915 diffractometer data. | | | |
Reference
| Z. Naturforsch. 37b, 1250—1254 (1982); received March 22 1982 | | | |
Published
| 1982 | | | |
Keywords
| Crown Ether, m-Nitroaniline, H Bridges, X-ray | | | |
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| default:Reihe_B/37/ZNB-1982-37b-1250.pdf | | | | Identifier
| ZNB-1982-37b-1250 | | | | Volume
| 37 | |
| 6 | Author
| Joachim Pickardt, Norbert Rautenberg | Requires cookie* | | | Title
| Die Kristallstruktur von Hexa- The Crystal Structure of Hexa-^-chloro-/^- oxo-tetrakis [hexamethylenetetraminecopper- (II)], [Cu4Cl60(C6H12Nl)4], a Copper(II) Complex with a Structure Related to that of Beryllium Oxoacetate | | | | Abstract
| -tetrakis [hexamethy lentetramin -kupfer(II)], [CU4C160(C6H12N4)4], einem Kupfer(II)-Komplex mit Berylliumoxoace-tat-ähnlicher Struktur By reaction of solutions of CuCl2 • 2H20 and hexamethylenetetramine, C6H12N4, in acetone, a complex [Cu4Cl60(C6Hi2N4)] could be ob-tained as single crystals. An X-ray analysis shows that the complex has a structure related to that of basic beryllium acetate. An oxygen atom is tetrahedrally surrounded by four cop-per atoms which, together with six chlorine atoms, form an adamantane-like core. Each copper atom is bonded via a nitrogen atom to a hexamethylenetetramine molecule. | | | |
Reference
| Z. Naturforsch. 37b, 1355—1357 (1982); eingegangen am 28. Juni 1982 | | | |
Published
| 1982 | | | |
Keywords
| Copper(II) Complexes, Chloro Complexes, Hexamethylenetetramine, X-ray | | | |
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| default:Reihe_B/37/ZNB-1982-37b-1355_n.pdf | | | | Identifier
| ZNB-1982-37b-1355_n | | | | Volume
| 37 | |
| 7 | Author
| Beatrix Milewski-Mahrla, Hubert Schmidbaur | Requires cookie* | | | Title
| Synthese und Kristallstrukturen einiger Tetramethylstibonium-Hydrogendicarboxylate Synthesis and Crystal Structures of Some Tetramethylstibonium Hydrogendicarboxylates | | | | Abstract
| Reactions of pentamethylantimony (CH^sSb with carboxylic acids in the molar ratio 1:2 afford one equivalent of methane and essentially quantitative yields of crystalline tetramethylstibonium hydrogendicarboxylates. Six new compounds of this series have been synthesized using benzoic, o-phthalic, salicylic, 4-ethoxy-salicylic, oxalic, and malic acid, and characterized by analytical and spectroscopic data. An ionic structure with strong hydrogen bonds in the anionic components is proposed. The crystal structures of the hydrogen-dibenzoate (1), hydrogen-ortho-phthalate (2) and 4-ethoxy-hydrogen-salicylate (3) were determined by single crystal X-ray diffraction. The compounds can be described as having ionic lattices with some donor-acceptor inter-actions between the stibonium centers and the carboxylate oxygen atoms. The anions are characterized by strong hydrogen bonds O...H...O. Thus, the (CH^Sb-tetrahedron in 1 is distorted by two benzoate oxygen atoms (at 304(2) and 340(2) pm). The cation in 2 is largely undistorted and the anion has a bydrogenpbthalate hydrogen bond of d(O...H...O) = 232 pm. The cation-anion contact in 3 is as short as d(Sb-O) = 289 pm rendering the Sb atom pentacoordinate. | | | |
Reference
| Z. Naturforsch. 37b, 1393—1401 (1982); eingegangen am 5. Juli 1982 | | | |
Published
| 1982 | | | |
Keywords
| Pentamethylantimony, Tetramethylstibonium Salts, Hydrogendicarboxylates, Hydrogen Bonding, X-ray | | | |
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| default:Reihe_B/37/ZNB-1982-37b-1393.pdf | | | | Identifier
| ZNB-1982-37b-1393 | | | | Volume
| 37 | |
| 8 | Author
| Beate Meyer, Hartmut Wunderlich | Requires cookie* | | | Title
| Kristallstrukturen von zwei Modifikationen des Mo(IV)-Komplexsalzes [(Et2PS2)3Mo3S(S2)3] (Et2PS2)- Crystal Structures of Two Modifications of the Mo(IV) Complex Salt [(Et2PS2)3M03S(S2)3] + (Et2PS2) | | | | Abstract
| Tris(diethyldithiophosphinato)-tris-/<-disulfido-^3-thiotriangulo-trimolybd©num(IV)-di-ethyldithiophosphinate, [(et2PS2)3Mo3S(S2)3] + (et2PS2) _ , crystallizes in two orthorhombic modifications with crystallographic parameters of A: a = 20.651(3), 6=10.152(2), c = 19.019(2) A, Pca2x, Z = 4 and B: a = 20.128(2), 6= 15.655(2), c = 12.608(1) A, Puma, Z = 4. Both crystal structures were determined from 2886 (A) and 3414 (B) X-ray data with R factors of 0.058 and 0.045, respectively. The Mo atoms form a trinuclear Mo3S(S2)3 cluster with local symmetry close to C3V in both modifications which differ in the packing of anions and cations and in the conformation of the ethyl groups. The av. distance Mo-Mo is 2.737 A, the coordination number of the Mo atoms is 7 within the cluster and 9 on inclusion of the S atoms of the dithiophosphinato group. | | | |
Reference
| Z. Naturforsch. 37b, 1437—1441 (1982); eingegangen am 24. Mai 1982 | | | |
Published
| 1982 | | | |
Keywords
| Trinuclear Molybdenum Cluster, Dithiophosphinato Complexes, Crystal Structure, X-ray | | | |
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| default:Reihe_B/37/ZNB-1982-37b-1437.pdf | | | | Identifier
| ZNB-1982-37b-1437 | | | | Volume
| 37 | |
| 9 | Author
| R. Tacke, A. Bentlage, W. S. Sheldrick, L. Ernst, K. Stoepel | Requires cookie* | | | Title
| Sila-Pharmaka, 24. Mitt. [1] Sila-Analoga von Nifedipin-ähnlichen 4-Aryl-2.6-cümethyl-1.4-dihydropyridin- 3.5-dicarbonsäure-dialkylestern, II Sila-Drugs, 24 th Communication [1] Sila-Analogues of Nifedipine-Like Di alkyl 4-Aryl-2,6-dimethyl-l,4-dihydropyridine- 3,5-dicarboxylates, II | | | | Abstract
| In the course of systematic studies on sila-substituted drugs the nifedipine-like 1.4-di-hydropyridine derivatives 4 a, 4 b and 4 c were prepared and investigated with respect to sila-substitution effects. By X-ray diffraction analyses 4 a, 4 b and 4 c were found to be isostructural. The C/Si-analogues exhibit similar spasmolytic activities (in vitro, guinea pig ileum), comparable with that of nifedipine. However, the compounds differ sub-stantially in their in vivo activity, as measured by the antihypertensive effect on the renal-hypertensive rat. The experimental results are discussed with respect to the carbon/silicon exchange. | | | |
Reference
| Z. Naturforsch. 37b, 443—450 (1982); eingegangen am 25. September 1981 | | | |
Published
| 1982 | | | |
Keywords
| Sila-Analogues of Nifedipine Derivatives, X-ray, Pharmacological Activity, Structure-Activity Relationships | | | |
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| default:Reihe_B/37/ZNB-1982-37b-0443.pdf | | | | Identifier
| ZNB-1982-37b-0443 | | | | Volume
| 37 | |
| 10 | Author
| Horst Elias, Elke Hilms, Helmut Paulus | Requires cookie* | | | Title
| X-Ray Structures and Spectral Properties of 4-Coordinate Copper(II) and Palladium(II) Complexes with a Tridentate ONN-Schiff Base Ligand | | | | Abstract
| The tridentate mono-basic Schiff base N-(2-diethylaminoethyl)salicylaldimine =Hsal-en-NEt2 forms complexes 1 = [(sal-en-NEt2)MY] with divalent metals M (Y = halide). The preparation of three copper(II) complexes la (Y = Br), lb (Y = Cl), and lc (Y = SCN) and one palladium(II) complex 1(1 (Y = Cl) is described and the UV/VIS spectra of these complexes in methanol and chloroform are compared and discussed. The crystals of la • CHCI3, lb • CHCI3, and Id • CHCI3 are all isotypic and crystallize in the ortho-rhombic space group Pbca, whereas the solvent-free crystals of 1 b (and also 1 a) are monoclinic with the space group P2i/c. The metal is 4-coordinate with an almost planar ONNY donor atom arrangement around the palladium and with a distorted arrangement around the copper. The crystals consist of separate non-bridged complex units and the chloroform is not coordinated. | | | |
Reference
| Z. Naturforsch. 37b, 1266—1273 (1982); received March 31 1982 | | | |
Published
| 1982 | | | |
Keywords
| X-ray, UV/VIS Spectra, Tridentate ONN Schiff Base, Copper(II) Complexes, Palladium(II) Complexes | | | |
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| default:Reihe_B/37/ZNB-1982-37b-1266.pdf | | | | Identifier
| ZNB-1982-37b-1266 | | | | Volume
| 37 | |
| 11 | Author
| Reinhold Tacke, Haryanto Linoh, MoayadT. Attar-Bashi, WilliamS. Sheldrick, Ludger Ernst, Roland Niedner, Joachim Frohnecke | Requires cookie* | | | Title
| Sila-Pharmaka, 26. Mitt. [1] Darstellung und Eigenschaften potentiell curarewirksamer Silicium-Verbindungen, III Sila-Pharmaca, 26th Communication [1] Preparation and Properties of Silicon Compounds with Potential Curare-Like Activity, III | | | | Abstract
| The potentially curare-hke silicon compounds 8a-Sf were synthesized and investigated with respect to their structure-activity relationships. The conformations of the com-pounds in the solid state and in solution were studied by X-ray diffraction analysis (8a-8e) and *H NMR spectroscopy (8a-8f), respectively. The muscle relaxing properties of 8a-8f were investigated on the mouse. The observed structure-activity relationships are not in accordance with the classical "14 A model" for neuromuscular blocking agents. Einführung | | | |
Reference
| Z. Naturforsch. 37b, 1461—1471 (1982); eingegangen am 19. April 1982 | | | |
Published
| 1982 | | | |
Keywords
| Silicon Compounds, Curare-Like Activity, X-ray, Conformational Analyses, Structure-Activity Relationships | | | |
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| default:Reihe_B/37/ZNB-1982-37b-1461.pdf | | | | Identifier
| ZNB-1982-37b-1461 | | | | Volume
| 37 | |
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