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1984 (324)
121Author    Z. NaturforschRequires cookie*
 Title    Polyine, IV [1] Synthese unsymmetrisch-substituierter Diacetylene über 1.1.2-TrichIor-l-alken-3-ine  
 Abstract    1,3-A lkadiynes, Trichlorovinyl Compounds Phenylacetylene (la) and 1-hexyne (lb) react with brom o(ethyl)m agnesium and tri-chloroacetaldehyde to the corresponding acetylenic carbinols 2. Successive treatment o f 2 with phosphorus pentachloride and triethylamine furnishes via the l,l,l,2 -tetra ch lo ro -3 -a lk y n es 3 the trichlorovinylacetylenes 5. The butyl derivatives 3b and 5 b are accom panied by the allene 4b, formed by propargyl rearrangement and not attacked by triethylamine. The trichlorovinyl com ­ 
  Reference    Z. Naturforsch. 39b, 661 (1984); eingegangen am 5. D ezem ber 1983 
  Published    1984 
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 TEI-XML for    default:Reihe_B/39/ZNB-1984-39b-0661.pdf 
 Identifier    ZNB-1984-39b-0661 
 Volume    39 
122Author    ErnstO. Tto, Fischer* R Udolf, Reitm Eier, KlausA. Ckerm AnnRequires cookie*
 Title    Ubergangsmetall-Carben-Komplexe, CXXXIV [1]  
 Abstract    Synthese neuer Mono-und Biscarben-Komplexe der VI. Nebengruppe; Röntgenstruktur des ersten Bis[amino(alkoxy)carben]-Komplexes Transition M etal Carbene Complexes, CXXXIV [1] Synthesis of New Mono-and Bis-Carbene Complexes of G roup V Ib Elem ents; Structure of the First Bis[amino(alkoxy)carbene]-Complex M ono-and Bis-Carbene C om plexes of Cr, M o, W The hexacarbonyl com pounds of chromium, molybdenum and tungsten react with the highly nucleophilic agent Li N'Pr2 and in a subsequent alkylation with (E t30) B F 4 to give the carbene 
  Reference    Z. Naturforsch. 39b, 668—6 (1984); eingegangen am 19. Januar 1984 
  Published    1984 
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 TEI-XML for    default:Reihe_B/39/ZNB-1984-39b-0668.pdf 
 Identifier    ZNB-1984-39b-0668 
 Volume    39 
123Author    PaavoH. HynninenRequires cookie*
 Title    Electron Donor-Acceptor Properties of 10(S)-Chlorophyll a  
 Abstract    Evidence for the self-aggregation o f 10(S)-chlorophyll a (= chlorophyll a') in nonpolar solvents has been obtained by means o f absorption spectroscopy in the visible and infrared regions. The visible absorption spectrum of chlorophyll a' exhibits a shoulder at 680 nm in aliphatic hydrocar­ bon solvents and the infrared spectrum measured in carbon tetrachloride contains an "aggrega­ tion peak" at 1650 cm "1. IR spectroscopy shows, in addition, that the C-10 epim ers o f chlorophyll a are both present as monom ers in tetrahydrofuran. H ow ever, in the presence of a small amount o f aliphatic alcohol or water, the IR spectrum in tetrahydrofuran at lowered tem peratures exhibits an intense, wide absorption band at ~ 1650 cm -1 which was interpreted as arising from the hydrogen bonding o f the hydroxyl group to the C-9 keto carbonyl o f the chlorophyll. 
  Reference    Z. Naturforsch. 39b, 675 (1984); received July 12 1983 
  Published    1984 
  Keywords    Chlorophyll Epim ers, Chlorophyll Organization, Stereochem istry, Photosynthesis, Infrared Spectra, Absorption Spectra 
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 TEI-XML for    default:Reihe_B/39/ZNB-1984-39b-0675.pdf 
 Identifier    ZNB-1984-39b-0675 
 Volume    39 
124Author    W. Aldemar, A., Chrisostomos Babatsikos3, Giuseppe CilentobRequires cookie*
 Title    Functionalized 1,2-Dioxetanes as Potentially Useful Biological and Chemotherapeutic Agents  
 Abstract    H ydroxym ethyl-substituted 1,2-dioxetanes (3) have been converted in reasonable yields (10—40%) into the carboxylate-substituted 1,2-dioxetanes (4) by means of the Brew ster—Ciotti or 
  Reference    Z. Naturforsch. 39b, 679 (1984); received D ecem ber 8 1983 
  Published    1984 
  Keywords    D ioxetanes, Esterification, Photoaffinity Labeling, Excited Carbonyl Products, Chemi-energization 
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 TEI-XML for    default:Reihe_B/39/ZNB-1984-39b-0679.pdf 
 Identifier    ZNB-1984-39b-0679 
 Volume    39 
125Author    O. Ttab, W. A. Dolf, H.J O Pferkuch, E. HeckerRequires cookie*
 Title    On the Active Principles of the Euphorbiaceae, IXa Ingenane Type Diterpene Esters from Five Euphorbia Species  
 Abstract    D iterpene Esters, Ingenol D erivatives, Skin Irritation, Euphorbiaceae Investigations o f E. antiquorum , E. helioscopia, E. palustris, E. peplu s and E. quadrialata for irritant and tumor prom oting constituents afforded several new ingenane type diterpene esters derived from the parent alcohols ingenol and 20-deoxyingenol and from the hitherto unknown 20-deoxy-16-hydroxyingenol and 20-deoxy-13.16-dihydroxyingenol. The irritant activities of the natural com pounds are reported together with som e aspects on structure activity relationships. 
  Reference    Z. Naturforsch. 39b, 683—6 (1984); received D ecem ber 5. 1983 
  Published    1984 
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 TEI-XML for    default:Reihe_B/39/ZNB-1984-39b-0683.pdf 
 Identifier    ZNB-1984-39b-0683 
 Volume    39 
126Author    A. Tta-, Ur-Rahm An, M. Bashir, S. Kaleem, T. Fatima, H.E JRequires cookie*
 Title    Catharanthus roseus+  
 Abstract    A new alkaloid has been isolated from the leaves o f Catharanthus roseus. Spectroscopic and degradative studies have established its structure to be 16-epi-19-S-vindolinine. In trod u ction While much work have been done on Catharan­ thus roseus (Apocynaceae) resulting in the isolation of about 100 alkaloids, there is persistent interest in the plant and new alkaloids continue to be reported. In continuation of our isolation and synthetic studies on the alkaloids of Catharanthus roseus [1 — 15], we have isolated a new alkaloid from the leaves of this plant by a combination of selective extraction, pre­ cipitation and crystallization and carried out spec­ troscopic and degradative studies on it to determ ine its structure. R esu lts and D iscu ssion 
  Reference    Z. Naturforsch. 39b, 695—7 (1984); received N ovem ber 21 1983 
  Published    1984 
  Keywords    Indoline A lkaloids, Catharanthus roseus, 13C NM R Spectra, V indolinine, Lead Tetraacetate 
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 TEI-XML for    default:Reihe_B/39/ZNB-1984-39b-0695.pdf 
 Identifier    ZNB-1984-39b-0695 
 Volume    39 
127Author    H. Erbert, W. Roesky, Ralf Em, Mathias Ert, G. Noltemeyer, M. Eorge, SheldrickRequires cookie*
 Title    Preparation and Structure of S3N 3 O 2 CI  
 Abstract    T rithiatriazacyclohexatriene, Crystal Structure S3N 30 2C1 (2) can be isolated as a decom position product o f S3N 3O2CI2 (1) in m ethylene chloride. Crystals o f 2 are m onoclinic, space group C2/c, with a = 1729.0(9), b = 670.7(4), c = 1201.4(7) pm , ß = 114.05(3)°. The structure was refined to R = 0.035 for 722 diffractom eter data. 2 is the first com pound containing a S3N 3-ring with three differently coordinated sulfur atoms. 
  Reference    Z. Naturforsch. 39b, 701 (1984); eingegangen am 3. Januar 1984 
  Published    1984 
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 TEI-XML for    default:Reihe_B/39/ZNB-1984-39b-0701.pdf 
 Identifier    ZNB-1984-39b-0701 
 Volume    39 
128Author    KurtO. Klepp, G. Ünther EulenbergerRequires cookie*
 Title    Darstellung und Kristallstruktur von Tl4TiS4, TI4SnS4 und Tl4TiSe4 Preparation and Crystal Structure of Tl4TiS4, Tl4SnS4, and Tl4TiSe4  
 Abstract    The isostructural com pounds Tl4TiS4, Tl4SnS4 and Tl4TiSe4 crystallize in the m onoclinic system , space group P2[/c with a — 8.328, b = 8.191, c — 15.248 Ä , ß = 104.53°; a = 8.395, b — 8.280, c — 15.398 Ä , ß = 103.69°, and a = 8.517, b = 8.389, c = 15.672 Ä , ß = 103.50°, respectively. There are four formula units in the unit cell. The crystal structures were determ ined and refined from single crystal diffractom eter data. They are characterized by isolated tetrahedral thioanions which are connected with each other by T l+ ions. The mean bond lengths are T i—S = 2.26 Ä , S n —S = 2.40 Ä and Ti —Se = 2.38 Ä . The T1 atoms are surrounded by six and seven chalcogen atom s, respectively, in an irregular and polar arrangement, thus indicating stereochem ical activity o f the lone electron pair o f the T l+ ions. T l -S distances vary from 2.93 to 3.98 Ä , T l—Se distances from 3.03 to 3.96 Ä . The Tl atom s have nearest Tl neighbours at distances ranging from 3.46 to 3.65 Ä . The crystal structure can be described as built from pseudotetragonal slabs oriented parallel to (001) which contain the cations and the tetrahedral anions. It is shown that a similar description is valid also for the crystal structures o f Tl4G eS4 [1] and N a4SnS4 [2, 3]. 
  Reference    Z. Naturforsch. 39b, 705 (1984); eingegangen am 27. Januar 1984 
  Published    1984 
  Keywords    Thallium Thiotitanate, Thallium Thiostannate, Thallium Selenotitanate, Preparation, Crystal Structure 
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 Identifier    ZNB-1984-39b-0705 
 Volume    39 
129Author    Z. NaturforschRequires cookie*
 Title    Der ThCr2Si2-Typ und verwandte Strukturen bei AFd2X2-Verbindungen (A = Ca, Sr, Ba; X = P, As)  
 Abstract    The T hC r2Si2-Type and Related Structures of /IPd^XVCompounds (A — Ca, Sr, Ba; X = P, As) A lbrecht Mewis The com pounds APd2X 2 (A = Ca, Sr; X = P, A s) have been prepared and their structures have 
  Reference    Z. Naturforsch. 39b, 713 (1984); eingegangen am 7. Februar 1984 
  Published    1984 
  Keywords    Ternary Pnictides, Alkaline Earth M etals, Palladium, Crystal Structure 
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 Identifier    ZNB-1984-39b-0713 
 Volume    39 
130Author    Irene Brüdgam, H. Ans, H. Artl, D. Ieter LentzRequires cookie*
 Title    Synthese und Kristallstrukturanalyse von  
 Abstract    Undecacarbonyl-(ia-trifluormethylisocyanid)trieisen, Fe3(/i-CNCF3)(CO)11 Synthesis and Crystal Structure D eterm ination of Undeca-carbonyl(«-trifluorom ethylisocyanide)triiron, Fe3(w-CNCF3)(C O)n Trifluorom ethylisocyanide, Isocyanide Ligand The unstable trifluorom ethylisocyanide can be stabilized on the Fe3(C O)n framework. Infrared data suggest that the isocyanide ligand occupies bridging positions in the solid state and in solution. This fact has been confirm ed by the crystal structure analysis and by 13C NM R m easure­ ments. 
  Reference    Z. Naturforsch. 39b, 721 (1984); eingegangen am 30. Januar 1983 
  Published    1984 
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 TEI-XML for    default:Reihe_B/39/ZNB-1984-39b-0721.pdf 
 Identifier    ZNB-1984-39b-0721 
 Volume    39 
131Author    G.Erhard Cordier, H. Erbert Schäfer, Michael StelterRequires cookie*
 Title    Ca3AISb3 und Ca5Al2Bi6, zwei neue Zintlphasen mit kettenförmigen Anionen New Zintl Phases with Chain Anions: On Ca3AlSb3 and Ca5Al2Bi6  
  Reference    Z. Naturforsch. 39b, 727 (1984); eingegangen am 25. Januar 1984 
  Published    1984 
  Keywords    Calcium Antim onidoalum inates, Calcium Bism utidoalum inates, Crystal Structures, Zintl Phases 
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 TEI-XML for    default:Reihe_B/39/ZNB-1984-39b-0727.pdf 
 Identifier    ZNB-1984-39b-0727 
 Volume    39 
132Author    Rhenium, BoronR. Obert, D. Antona, E.Berhard Schweda, Joachim SträhleRequires cookie*
 Title    Synthese und Kristallstruktur von Re(NBCl3)Cl2[P(CH3)2C6H5]3, ein Komplex mit einer Nitridobrücke zwischen Rhenium und Bor Synthesis and Crystal Structure of Re(N BCl3)Cl2[P(CH3)2C6H 5]3, a Complex with a N itrido Bridge between  
 Abstract    R eN C l2(P M e2Ph)3 reacts as a Lewis base and with BC13 forms a nitrido bridge betw een Re and B. The resulting com plex R e(N B C l3)Cl2(PM e2Ph)3 crystallizes orthorhom bic in the space group Pn2! a with Z = 4. In the com plex each Re atom has six nearest neighbours in an almost octahedral arrangement with the NBC13 group being trans to one o f the Cl ligands. The difference betw een the two Re —Cl bond lengths (239,4 and 243,9 pm) indicates a weak trans effect o f NBC13. The linear bridge R e = N — B has bonding distances o f R e —N = 172,8 and N -B = 153 pm. B onding o f BC13 by the nitrido ligand causes a small 
  Reference    Z. Naturforsch. 39b, 733 (1984); eingegangen am 15. Februar 1983 
  Published    1984 
  Keywords    Nitrido Bridge, Synthesis, Crystal Structure, Rhenium, Boron 
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 TEI-XML for    default:Reihe_B/39/ZNB-1984-39b-0733.pdf 
 Identifier    ZNB-1984-39b-0733 
 Volume    39 
133Author    Brigitte Eisenmann, M. Ehm, Et SomerRequires cookie*
 Title    K2SiP2, ein Phosphidopolysilikat(IV) K2SiP2, a Phosphidopolysilicate(IV)  
 Abstract    The new com pound K2SiP2 crystallizes in the orthorhombic system , space group Ibam. The unit cell with the lattice constants 
  Reference    Z. Naturforsch. 39b, 736—7 (1984); eingegangen am 3. Februar 1983 
  Published    1984 
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 TEI-XML for    default:Reihe_B/39/ZNB-1984-39b-0736.pdf 
 Identifier    ZNB-1984-39b-0736 
 Volume    39 
134Author    Claus Friebel, Martin JansenRequires cookie*
 Title    Lichtabsorption von oxidischen Silber(I)-Verbindungen Light Absorption of Silver(I)-oxides  
 Abstract    Silver(I)-oxides, D iffuse Reflectance Spectra, Correlation of Structural and Spectroscopic Features D iffuse reflectance spectra of A g2S 0 4, A g 3P 0 4, A g 2C 0 3, A g 2G e20 5, A g B 0 2, A g 3B 0 3-II, A g6Si20 7, A g 10Si4O 13 and A g 10G e4O 13 in the region v = 10000—40000 cm -1 and generally at 298 K and ambient pressure were measured. A dditional spectra were recorded at 5 K for A g 3B 0 3 and A g 3P 0 4, and under application o f a static pressure o f 80 kbar for A g 10Si4O 13. A s a com m on feature all spectra show a steep absorption edge, which is only structured in singular cases. The edges appear in the remarkably wide range from 33100 cm -1 (A g 2S 0 4) to 13500 cm -1 (A g 10G e4O 13). A s the shifts correlate with the dim ensions o f the cluster-like silver partial structures, the absorptions have been attributed to 4 d —>5s band-band transitions, an interpretation, which is in agreem ent with the low temperature and high pressure spectra. H ow ever, effects originating from charge-transfer transitions cannot be absolutely excluded. 
  Reference    Z. Naturforsch. 39b, 739—7 (1984); eingegangen am 26. Januar 1984 
  Published    1984 
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 TEI-XML for    default:Reihe_B/39/ZNB-1984-39b-0739.pdf 
 Identifier    ZNB-1984-39b-0739 
 Volume    39 
135Author    H. Einrich, N. Ötha, E. Kkehard FluckbRequires cookie*
 Title    Röntgenstrukturuntersuchungen an Verbindungen mit P —NH—P-Gerüst X-Ray Structural Studies on Com pounds with a P —N H -P Backbone  
 Abstract    X -R ay, B is(diphenylphosphino)am in, Bis(P-boran(3)-diphenylphosphino)am in, D iethylphosphinyl-diphenoxyphosphorylam in, Bis(diphenoxyphosphoryl)am in 
  Reference    Z. Naturforsch. 39b, 744 (1984); eingegangen am 5. Oktober 1983 
  Published    1984 
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 Identifier    ZNB-1984-39b-0744 
 Volume    39 
136Author    M. Arkus Wieber, Isa Fetzer-KremlingRequires cookie*
 Title    Darstellung von einigen Phenyldicarboxylatostibanen Syntheses of Some Phenyldicarboxylatostibanes  
 Abstract    Som e phenyldicarboxylatostibanes of the general formula C6H 5S b (O C -R) ; were synthesized O by simple m etathesis reactions from phenyldiethoxystibane and carboxylic acids in the ratio 1:2. By reaction o f 1,2-dicarboxylic acids with phenyldiethoxystibane in the ratio 1:1 phenyldicarboxyl­ atostibanes are also obtained. Som e properties and the 'H NM R spectra o f these com pounds are described, IR data are reported and discussed. 
  Reference    Z. Naturforsch. 39b, 754 (1984); eingegangen am 22. D ezem ber 1983 
  Published    1984 
  Keywords    Phenyldicarboxylatostibanes, Cyclic Derivatives, Synthesis, Properties, Spectra 
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 TEI-XML for    default:Reihe_B/39/ZNB-1984-39b-0754.pdf 
 Identifier    ZNB-1984-39b-0754 
 Volume    39 
137Author    Joachim Fuchs, Rosemarie PalmRequires cookie*
 Title    Struktur und Schwingungsspektrum der Heteropolyverbindung K13[KP2W2o0 7 2 ]' jcH20 Structure and Vibrational Spectrum of the Heteropoly Com pound K 13[KP2W 20O 72]-.x:H2O  
 Abstract    The title com pound crystallizes m onoclinicly in the space group P 2 1/c with lattice parameters a = 13.522 Ä, b = 22.379 Ä, c = 15.071 Ä und ß = 95.95°. In the polyanion two a-PW 9034 
  Reference    Z. Naturforsch. 39b, 757 (1984); eingegangen am 19. Januar 1984 
  Published    1984 
  Keywords    X -R ay, Tungstophosphate, Preparation, H eteroatom Potassium, Vibrational Spectrum 
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 TEI-XML for    default:Reihe_B/39/ZNB-1984-39b-0757.pdf 
 Identifier    ZNB-1984-39b-0757 
 Volume    39 
138Author    H. Ans Bocka, W. Olfgang Kaima, Mitsuo Kira3, LouisR. Eneb, H. Einz-G, V. Ünther, IehebRequires cookie*
 Title    Radikalionen, 61 [ 1 , 2 ] Dialkylamino-substituierte Acetylene und Allene: Ionisation, Oxidation und AlCI3-katalysierte Wasserstoffübertragung Radical Ions, 61 [1, 2] D ialkylam ino-substituted Acetylenes and Allenes: Ionisation, O xidation and AlCl3-Catalyzed Hydrogen Transfer  
 Abstract    The photoelectron (P E) spectra of bis(dialkylam ino) acetylenes R 2N — C = C —N R 2 and o f tet-rakis(dialkylam ino) allenes (R 2N)2C = C = C (N R 2)i with R = C H 3, C2H 5 exhibit characteristic ionization patterns which are assigned to re radical cation states of the two m olecular halves twisted against each other. The low first ionization potentials betw een 7.0 eV and 7.7 eV stim u­ lated attempts to oxidize using A1C13 in H 2CC12 or D 2CC12. The hyperfine structured E SR spectra observed can be unequivocally assigned to the ethylene radical cations R 2N — HC = CH — N R 2 © which are formed from the obviously non-persistent species R2N —C ^ C — N R 2 ® via a hydrogen transfer. During the oxidation o f the dialkylam ino-substituted allenes no paramagnetic interm edi­ ates could be d etected , presumably due to a rapid dimerisation o f the allene radical cation (R 2N)2C = C = C (N R 2)2'®. 
  Reference    Z. Naturforsch. 39b, 763—770 (1984); eingegangen am 28. N ovem ber 1983 
  Published    1984 
  Keywords    D ialkylam ino Substituted n Systems Radical Cations, ESR Spectra, PE Spectra 
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 TEI-XML for    default:Reihe_B/39/ZNB-1984-39b-0763.pdf 
 Identifier    ZNB-1984-39b-0763 
 Volume    39 
139Author    Hans Bock, B.Ernhard Roth, Jörg DaubRequires cookie*
 Title    Radikalionen, 62 [ 1 —3] Bis(dimethyIamino)dibenzoheptafulven-Radikalkation Radical Ions, 62 [1—3] Bis(dim ethylam ino)dibenzoheptafulvene Radical Cation  
  Reference    Z. Naturforsch. 39b, 771—7 (1984); eingegangen am 28. N ovem ber 1983 
  Published    1984 
  Keywords    Dialkylam ino-substituted jr-Systems, Radical C ation, E SR Spectra, M O Calculations, PE Spectra 
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 TEI-XML for    default:Reihe_B/39/ZNB-1984-39b-0771.pdf 
 Identifier    ZNB-1984-39b-0771 
 Volume    39 
140Author    R. Blachnik, G. Kurz, U. WickelRequires cookie*
 Title    Zwei neue Tetraphosphor-trichalkogeno-diiodide a'-P4Se3l2 und « -P4S3I2 Two New Tetraphosphorus-trichalcogeno-diiodides a '-P 4Se3I2 and a '-P 4S3I2  
  Reference    Z. Naturforsch. 39b, 778 (1984) 
  Published    1984 
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 Identifier    ZNB-1984-39b-0778 
 Volume    39 
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