| 1 | Author
| Michel Mégnamisi-Bélombé, Helmut Endres | Requires cookie* | | Title
| Two Modifications of Tetraethylammonium tranis-Diiodobis(ethanedialdioximato)cobaltate(III) with and without Intermolecular 1--I Interactions  | | | Abstract
| The structures of two modifications of [C 8 H 2 nN][C4H 6 Col2N 4 04], M r -617.11, have been deter-mined by X-rav investigations. Form 1 is orthorhombic, Pben, a = 8.417(2), b — 12.923(3), c = 18.444(3) A, V = 2006 Ä 3 , Z = 4, d c = 2.04 gem" 3 , final R w = 0.037 for 1989 reflections and 124 parameters. There are no unusual intermolecular interactions in this modification. From 2 is tetragonal, \A x md, a = 8.886(3), c = 25.841(6) Ä, V = 2040 Ä 3 , Z = 4, d c = 2.01 gem" 3 , final R w = 0.027 for 1629 reflections and 80 parameters. In this modification the metal complexes form strictly linear chains via short intermolecular I -I contacts, 3.722(1) Ä. | | |
Reference
| (Z. Naturforsch. 42b, 1—4 [1987]; received August 21 1986) | | |
Published
| 1987 | | |
Keywords
| Structure, Dioxime Complex, Iodine Interactions, Linear Chain Compounds | | |
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| default:Reihe_B/42/ZNB-1987-42b-0001.pdf | | | Identifier
| ZNB-1987-42b-0001 | | | Volume
| 42 | |
4 | Author
| Vicente Fernández, Moisés Morán, JuanCarlos Doadrio, Elke Conradi, Wolfgang Willing, Ulrich Müller | Requires cookie* | | Title
| EPR-Spektren von Tetrachlorocupraten verschiedener Aminothiazoliumderivate. Die Kristallstrukturen von 2-Amino-2-thiazolinium-und 2-Amino-4-methylthiazoliumtetrachlorocuprat(II) EPR Spectra of Tetrachlorocuprates of Several Aminothiazolium Derivatives. The Crystal Structures of 2-Amino-2-thiazolinium and 2-Amino-4-methylthiazolium Tetrachlorocuprate(II)  | | | Abstract
| The tetrachlorocuprates. of the 2-aminothiazolium ion and of four of its substitution products, of 2-aminothiazolinium, and of 2-amino-4-carboxyl-thiazolidinium ions were prepared from the cor-responding heterocyclic bases, hydrochloric acid and copper(II) chloride in ethanol. The thermo-chromic compounds were characterized by their IR and electronic spectra. The EPR spectra of solutions, frozen solutions, and of the solids show the CUC14 2 ~ ion to have the structure of a flattened tetrahedron; in the case of some of the solids, distortions from D 2 d symmetry are observed. This was confirmed by two X-ray crystal structure determinations. Crystal data: 2-amino-2-thiazolinium tetrachlorocuprate, monoclinic, space group C2/c, a = 2772.8, b = 780.0, c = 1560.0 pm, ß = 112.04°, Z = 8 (R = 0.047 for 2527 observed, independent reflexions); 2-amino-4-methylthiazolium tetrachlorocuprate, triclinic. PI, a = 780.4, b = 853.4, c — 1381.4 pm, a = 103.50, ß = 99.39, y = 104.17°, Z = 2 (R = 0.041 for 3319 reflexions). In both compounds the flattened CuCl 4 2 " tetrahedron is distorted and has two bond angles in the range between 130 and 141°. The heterocyclic cations are protonated at their ring N atoms; the corresponding H atoms and the H atoms of the amino groups are involved in N — H--C1 hydrogen bonding. | | |
Reference
| (Z. Naturforsch. 42b, 15—22 [1987]; eingegangen am 31. Juli 1986) | | |
Published
| 1987 | | |
Keywords
| Aminothiazolium Derivates, Tetrachloro Cuprates, EPR Spectra, Crystal Structure | | |
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| default:Reihe_B/42/ZNB-1987-42b-0015.pdf | | | Identifier
| ZNB-1987-42b-0015 | | | Volume
| 42 | |
5 | Author
| Ernst Egert, Ursula Kliebisch, Uwe Klingebiel, Dieter Schmidt | Requires cookie* | | Title
| Cyclodi-und -trisilazane — Synthese, Reaktionen und Ringkopplungen Cyclodi-and -trisilazanes — Synthesis, Reactions and Ring Coupling  | | | Abstract
| Contrary to our expectations, a cyclotrisilazane is obtained instead of a cyclodisilazane by the reaction of the lithiated di-rerf-butyldiamino-silane with Hal 2 SiMe 2 . Mono-and disubstitution takes place in reactions of lithiated tetra-isopropyl cyclodisilazane with halogeno-silanes and -boranes. A disubstituted ring reacts with LiOC 4 H 9 -formed from LiC 4 H y and THF — to give an unsymmetrically substituted four-membered ring as proved by a crystal structure determination. Coupling of four-and six-membered rings occurs in the reaction of SiF-substituted and lithiated rings. | | |
Reference
| (Z. Naturforsch. 42b, 23—30 [1987]; eingegangen am 1. September 1986) | | |
Published
| 1987 | | |
Keywords
| Cyclosilazanes, Substitution, Ring Coupling, Crystal Structure | | |
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| default:Reihe_B/42/ZNB-1987-42b-0023.pdf | | | Identifier
| ZNB-1987-42b-0023 | | | Volume
| 42 | |
7 | Author
| Bernward Engelen, Willi Buchmeier, HeinzDieter Lutz | Requires cookie* | | Title
| Zur Polymorphie des Cadmiumsulfits, Kristallstrukturen von CdS0 3 -I, CdS0 3 -II und CdS0 3 -III Polymorphic Cadmium Sulfites, Crystal Structures of CdS0 3 -I, CdS0 3 -II, and CdSO r III  | | | Abstract
| The crystal structures of the anhydrous cadmium sulfites CdS0 3 -I (¥2 x /c, Z=4), CdS0 3 -II (P2/C, Z=8), and CdS0 3 -III (R3, Z=18 for the hexagonal cell) have been determined by means of single crystal X-ray diffraction data. The final R for the 1475, 2349, and 2138 observed reflections are 0.040, 0.034, and 0.073. Coordination of Cd is trigonal-prismatic, a hitherto unknown coordination of Cd in salts of oxoacids, in CdS0 3 -I and CdS0 3 -II, and octahedral in CdS0 3 -III. The Cd0 6 -polyhedra are arranged in two-dimensional (CdS0 3 -I) and three-dimensional (CdS0 3 -II and CdS0 3 -III) networks. S0 3 2-groups act as monodentate and in CdS0 3 -I and CdS0 3 -II also as bidentate ligands. Cd—O distances range from 224.5(3) to 244.6(3) pm, with an average of 231.5 pm for the trigonal-prismatic and of 231.0 pm for the octahedral coordination. S—O dis-tances range from 152.3(3) to 155.3(3) pm with an average of 153.7 pm, the O —S—O angles from 99.2(2) to 106.7(3)° with an average of 103.2°. | | |
Reference
| (Z. Naturforsch. 42b, 37—41 [1987]; eingegangen am 2. Juli/16. September 1986) | | |
Published
| 1987 | | |
Keywords
| Cadmium Sulfites, Crystal Structure, Sulfites | | |
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| default:Reihe_B/42/ZNB-1987-42b-0037.pdf | | | Identifier
| ZNB-1987-42b-0037 | | | Volume
| 42 | |
9 | Author
| Roger Blachnik, Willi Buchmeier, Claudia Schneider, Ulrike Wickel | Requires cookie* | | Title
|  | | | Abstract
| Phosphorus Selena Iodide, 5-Iodo-2,3,6,7-tetraselena-l,4,5-triphosphabicyclo[221]heptan. Reaction of Phosphorus Selenide with Iodine, Structure of P 3 Se 4 I, 31 P NMR Spectra P 3 Se 4 I is formed by the reaction of molten P 4 Se 3 and I 2 . P 3 Se 4 I is monoclinic, space group P2,/c with the lattice parameters of a = 1130.3(3) pm, b = 654.5(2) pm, c -1420.5(4) pm, ß — 117.64(2)°. d = 3.87 gem" 3 and d v = 3.82 gem" 3 for Z = 4. The structure of the molecule is derived from the structure of a-or /?-P 4 Se 3 I 2 by the substitution of a P—I group by a Se-atom. The P—I, P —P and Se — Se bond lengths are 249.9, 219.2 and 236.9 pm. resp. The mean P—Se bond length is 225.0 pm. The molecule is stabilized by two weak intramolecular P—Se and P—I bonds, comparable to the bonding situation in a-P 4 Se 3 I 2 . The 31 P NMR spectra reveal a coalescence effect, due to equilibrium between two isomeric forms of the molecules. | | |
Reference
| (Z. Naturforsch. 42b, 47—51 [1987]; eingegangen am 16. Juni/21. Juli 1986) | | |
Published
| 1987 | | |
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| default:Reihe_B/42/ZNB-1987-42b-0047.pdf | | | Identifier
| ZNB-1987-42b-0047 | | | Volume
| 42 | |
10 | Author
| Yuzo Nishida, Masataka Takeuchi | Requires cookie* | | Title
| Unique Reactivity of Peroxide Ion Trapped by Binuclear Iron(III) Complex  | | | Abstract
| Binuclear Iron(III) Complex, Peroxide Ion The (1:1) peroxide adduct of the binuclear iron(III) complex exhibited high reactivity towards 1,3-diphenylisobenzofuran, one of the efficient singlet oxygen (] zl g) quencher. The activation of the peroxide ion in this molecule was discussed in relation to the monooxygenase function of this compound. | | |
Reference
| (Z. Naturforsch. 42b, 52—54 [1987]; received April 23 1986) | | |
Published
| 1987 | | |
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| default:Reihe_B/42/ZNB-1987-42b-0052.pdf | | | Identifier
| ZNB-1987-42b-0052 | | | Volume
| 42 | |
11 | Author
| Josef Geisenberger, Jürgen Erbe, Jürgen Heidrich, Ulrich Nagel, Wolfgang Beck | Requires cookie* | | Title
| Pseudohalogenometallverbindungen, LXV [1] Synthese von Tetrazolen und Triazolen über die 1,3-dipolare Cycloaddition an die Azid-Liganden von polymeren Cobalt(III)-und PalIadium(II)-Komplexen. Darstellung und Struktur von 5-TrichlormethyItetrazol Pseudohalogeno Metal Compounds, LXV [1] Synthesis of Tetrazoles and Triazoles via 1,3-Dipolar Cycloaddition to the Azido Ligands of Polymerie Cobalt(III) and Palladium(II) Complexes. Synthesis and Structure of 5-Trichloromethyltetrazole  | | | Abstract
| The cycloaddition of nitriles and of dimethylacetylenedicarboxylate to the azide ligand of polymeric Schiff Base cobalt(III) and phosphine palladium(II) complexes gives the corresponding tetrazolate and triazolate complexes from which the heterocycles could be cleaved by hydrogen chloride. Usually the yields are low; if the heterocycle is soluble in ether or sublimable, yields up to 30% have been obtained. Using this method the hitherto unknown 5-trichlormethyltetrazole could be prepared which was characterized by an X-ray structural analysis. Similarly, the cyclo-addition of azido(tetraphenylporphinato)cobalt(III) with nitriles, cyclohexylisocyanide and Me0 2 CC=CC0 2 Me affords the corresponding complexes with heterocyclic ligands. The prepa-ration of tetraphenylporphyrinato(tricyanmethanido)cobalt(III), (TPP)CoN-CC(CN) 2 , is reported. | | |
Reference
| (Z. Naturforsch. 42b, 55—64 [1987]; eingegangen am 24. Juli 1986) | | |
Published
| 1987 | | |
Keywords
| Tetrazoles, Triazoles, Polymerie Schiff Base Cobalt(III) Complexes, Phosphine Palladium Complexes with Azide, Tetrazolate and Triazolate Ligands | | |
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| default:Reihe_B/42/ZNB-1987-42b-0055.pdf | | | Identifier
| ZNB-1987-42b-0055 | | | Volume
| 42 | |
12 | Author
| Max Herberhold, Wolfgang Bühlmeyer, Alfred Gieren, Thomas Hübner, J. Wu | Requires cookie* | | Title
|  | | | Abstract
| Fragmentation of bis(rm-butyl) sulfur diimide, S(NBu') 2 (la), in the presence of Ru 3 (CO)i 2 leads to a yellow tetrahedrane-type complex Ru 2 (CO) 6 (Bu r NS) (3a) containing rer/-butyl sulfur imide as a six-electron ligand. According to the X-ray structure determination the N —S bond (1.716 Ä) is arranged perpendicular to the Ru —Ru axis (2.661 Ä). | | |
Reference
| (Z. Naturforsch. 42b, 65—70 [1987]; eingegangen am 3. September 1986) | | |
Published
| 1987 | | |
Keywords
| Di(rm-butyl) Sulfur Diimide, tert-Butyl Sulfur Imide, Ruthenium Complex, Tetrahedrane Structures | | |
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| default:Reihe_B/42/ZNB-1987-42b-0065.pdf | | | Identifier
| ZNB-1987-42b-0065 | | | Volume
| 42 | |
13 | Author
| Heindirk Tom Dieck, Ingo Kleinwächter | Requires cookie* | | Title
| Rutheniumkomplexe mit Diazadienen, VI [1] f/ 6 -Cycloheptatrien-und ?7 4 -Norbornadien-diazadien-ruthenium(0)-Komplexe Ruthenium Complexes with Diazadienes, VI [1] ^ 6 -Cycloheptatriene-and >; 4 -Norbornadiene-diazadiene-ruthenium(0) Complexes  | | | Abstract
| Reduction of [(cyclo-C 7 H 8)RuCl 2 ]2 in the presence of a diazadiene RN-CH—CH=NR (DAD; R = 2-C3H7) gives red, airsensitive, sublimable ()/ 6 -C 7 H 8)Ru(DAD) (5). A rigid structure on the basis of the 'H NMR spectrum is excluded. On the other hand pentacoordinate complexes [(j/ 4 -ttor-C 7 H 8)Ru(DAD)P(C 6 H 5) 3 ] (8) or [(^ 4 -«or-C 7 H 8)Ru(DAD)CO] (9) have rigid, C s -sym-metric, square-pyramidal structures. They are obtained by chemical or irreversible electro-chemical reduction of [(>7 4 -rcor-C 7 H 8)Ru(DAD)Cl 2 ] to [(^ 4 -nor-C 7 H 8)Ru(DAD)(solv)] (7) (solv = tetrahydrofuran or acetonitrile) and addition of phosphine or carbon monoxide. 7, in non-coor-dinating solvents, is a stereospecific catalyst for the 1-alkene —trans-2,.. ,-alkene isomerization. | | |
Reference
| (Z. Naturforsch. 42b, 71—76 [1987]; eingegangen am 1. September 1986) | | |
Published
| 1987 | | |
Keywords
| Ruthenium(O) Complexes, Diazadienes, Cycloheptatriene, Norbornadiene | | |
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| default:Reihe_B/42/ZNB-1987-42b-0071.pdf | | | Identifier
| ZNB-1987-42b-0071 | | | Volume
| 42 | |
14 | Author
| Udo Kunze, Rolf Tittmann | Requires cookie* | | Title
| Phosphinsubstituierte Chelatliganden, XXIII [1] Darstellung und NMR-Spektren von Alkyl-arylphosphinothioformamiden, R(Ph)PC(S)NHMe Phosphine-Substituted Chelate Ligands, XXIII [1] Synthesis and NMR Spectra of Alkyl-arylphosphinothioformamides, R(Ph)PC(S)NHMe  | | | Abstract
| A series of alkyl-arylsubstituted N-methyl phosphinothioformamides, R(Ph)PC(S)NHMe (2 a—g), with varying bulkiness of the alkyl rest was synthesized from the racemic secondary phosphines la—g and methyl isothiocyanate. 'H and 13 C NMR spectra of 2a—g reveal signal sets of diastereotopic nuclei due to the asymmetry of the molecule. The chemical shift and coupling constants were confirmed by simulation in case of 2b, c. The vicinal 31 P— 13 C cou-plings of the menthyl and neomenthyl compounds 2f, g show an "anti-Karplus" behaviour CJ(gauche) > ? J(trans)) and allow the conformational assignment of the alicyclic group. The 31 P chemical shifts of 2a—d give a linear correlation with the cone angle of the alkyl substituents quoted from literature. | | |
Reference
| (Z. Naturforsch. 42b, 77—83 [1987]; eingegangen am 8. August 1986) | | |
Published
| 1987 | | |
Keywords
| Alkyl-arylphosphinothioformamides, Menthyl and Neomenthyl Derivatives, NMR Spectra, Conformational Analysis, Substituent Influence | | |
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| default:Reihe_B/42/ZNB-1987-42b-0077.pdf | | | Identifier
| ZNB-1987-42b-0077 | | | Volume
| 42 | |
15 | Author
| Richard Neidlein, Dagmar Knecht, Alfred Gieren, Catalina Ruiz-Pérez | Requires cookie* | | Title
|  | | | Abstract
| The synthesis of 1 by reaction of phenanthro[9,10-c]-l,2,5-selenadiazole with ethylmagnesium-bromide and TeCI 4 is described; the X-ray structure analysis is reported. | | |
Reference
| (Z. Naturforsch. 42b, 84—90 [1987]; eingegangen am 9. August 1986) | | |
Published
| 1987 | | |
Keywords
| Chalkogen-Diimides, 1, 2, 5-Telluradiazole, X-Ray | | |
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| default:Reihe_B/42/ZNB-1987-42b-0084.pdf | | | Identifier
| ZNB-1987-42b-0084 | | | Volume
| 42 | |
16 | Author
| Rahman, Sajida Khanum, Yasmin Badar, Kaneez Fatima, Yusuf Ahmad, H.E J | Requires cookie* | | Title
| Atta-ur  | | | Abstract
| Continuing studies on the leaves of Rhazya stricta have resulted in the isolation of a new Picralima alkaloid, N h -methyl strictamine 2. | | |
Reference
| (Z. Naturforsch. 42b, 91—93 [1987]; received June 10 1986) | | |
Published
| 1987 | | |
Keywords
| Rhazya stricta, Alkaloids, Indolenine, 13 C NMR Spectra, Mass Spectra | | |
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| default:Reihe_B/42/ZNB-1987-42b-0091.pdf | | | Identifier
| ZNB-1987-42b-0091 | | | Volume
| 42 | |
17 | Author
| M. Hammouda, W. S. Hamama, E. M. Afsah | Requires cookie* | | Title
| A Study on the Mannich Reaction with l-Phenylamino-3-indenone  | | | Abstract
| Mannich Reaction. l-Phenylamino-3-indenone Mannich reaction of the title compound 1 with formaldehyde and morpholine, piperidine or piperazine afforded the Mannich bases 3—5 respectively, whereas the indeno[1.2-d]pyrimidines (6—7) were obtained where primary amines were used. Treatment of 2 with formaldehyde gave benz[b]indeno-diazepine (8). The reaction of formaldehyde with 1 was also investigated. | | |
Reference
| (Z. Naturforsch. 42b, 94—96 [1987]; received May 9. 1986) | | |
Published
| 1987 | | |
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| default:Reihe_B/42/ZNB-1987-42b-0094.pdf | | | Identifier
| ZNB-1987-42b-0094 | | | Volume
| 42 | |
18 | Author
| RolfW. Saalfrank, Franz Schütz, Hans-Ulrich Hummel | Requires cookie* | | Title
| Vinylacetylene aus 1.3-Bis(dialkylamino) -1,3-diethoxyallenen und Alkylidenmalonylchloriden. Kristall-und Molekülstruktur von 3-(Diphenyl)methylen-6-diisopropylamino-5-diisopropyIaminocarbonyl- 2.4-dioxo-3,4-dihydro-2H-pyran [1] Vinylacetylenes from l,3-Bis(dialkylamino)-l,3-diethoxyallenes and Alkylidenemalonyl Chlorides. Crystal and Molecular Structure of 3-(Diphenyl)methylene-6-diisopropylamino-5-diisopropylaminocarbonyl- 2,4-dioxo-3,4-dihydro-2H-pyrane [1]  | | |
Reference
| (Z. Naturforsch. 42b, 97—100 [1987]; eingegangen am 14. Juli 1986) | | |
Published
| 1987 | | |
Keywords
| Tetra Donor Substituted Allenes, Vinylacetylenes, 3-Methylene-2, 4-dioxo-3, 4-dihydro-2H-pyranes, Crystal Structure | | |
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| default:Reihe_B/42/ZNB-1987-42b-0097.pdf | | | Identifier
| ZNB-1987-42b-0097 | | | Volume
| 42 | |
19 | Author
| Karl Folkers, Cyril Bowers, Xiao Shao-Bo, Pui-Fun, Louisa Tang, Minoru Kubota, Janusz Stepinski, Teresa Kubiak | Requires cookie* | | Title
| Activities of Antagonists of the Luteinizing Hormone Releasing Hormone with Emphasis on Positions 1, 5 and 6 and on Positions 1, 2 and 3  | | | Abstract
| Analogs of the luteinizing hormone releasing hormone (LHRH) which are antagonists for controlling ovulation require potency and negligible release of histamine as a side effect. Forty analogs were designed, synthesized and bioassayed in two groups with emphasis upon positions 1, 5 and 6 and upon positions 1, 2 and 3. N-Ac-D-2-Nal 1 , D-pClPhe 2 , D-3-Pal 3 , Ser 4 , Tyr 5 . D-Lys 6 , | | |
Reference
| (Z. Naturforsch. 42b, 101—106 [1987]; received July 18 1986) | | |
Published
| 1987 | | |
Keywords
| Luteinizing Hormone Releasing Hormone, a«f/-Ovulatory Activity, Peptide, Antagonist, Histamine Release | | |
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| default:Reihe_B/42/ZNB-1987-42b-0101.pdf | | | Identifier
| ZNB-1987-42b-0101 | | | Volume
| 42 | |
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