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1993[X]
61Author    Horst Kunkely, Arnd VoglerRequires cookie*
 Title    Photoredox Reaction of [Hg(cyclam)|2+[Co(CO)4r Induced by Outer Sphere Charge Transfer Excitation  
 Abstract    Photoredox Reaction, Charge Transfer, Mercury(II), C o b a lt(-I) The ion pair [Hg(cyclam)]2+[Co(CO)4]~ dis­ plays a C o (-I) to Hg(II) metal-to-metal charge transfer (MMCT) band at 288 nm. U pon M M CT excitation the ion pair undergoes a photoconver-sion to [HgCO,(CO)g]. 
  Reference    Z. Naturforsch. 48b, 397—398 (1993); received December 10 1992 
  Published    1993 
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 Identifier    ZNB-1993-48b-0397_n 
 Volume    48 
62Author    Christian Robl, K. Arin HaakeRequires cookie*
 Title    K2ISeMo30 13l * 3,5 H 20 und K2[SMo30 13] * 4 H 20-Verbindungen mit kettenförmigen Heteropolyanionen des SeVI und S VI K 2[SeM o30 13] * 3.5 H ;0 and K 2[SMo30 13] -4H 20 -C om pounds with Chain-Like Heteropoly-Anions of SeVI and SV I  
 Abstract    M olybdoselenate(VI), Molybdosulfate(VI), Crystal Structure, Differential Thermal Analysis Colourless monoclinic (space group C2/m) single crystals up to 1 mm long of K 2[SeM o30 , 3] -3.5H 20 and K 2[SM o30 | 3]-4 H 20 , respectively, were prepared from aqueous so­ lution. Crystal data: Se com pound a = 1703.5(2), b = 1088.5(1), c = 865.3(1) pm, ß = 109.666(9)°, 1670 unique reflections, 123 parameters, R = 0.0233; S com pound a = 1702.7(2), b = 1079.6(1), c = 884.9(1) pm, ß = 112.248(9)°, 1458 unique reflections, 123 parameters, R" = 0.0250. Both com pounds cleave very easily to thin fibres. The chain-like heteropoly-anions are composed o f chains o f edge-sharing M o 0 6 coordination octahedra and X 0 4 tetrahedra (X = S, Se) linked to three different octahedra through common corners. Differential thermal analy­ sis indicates that no decomposition occurs with K2[SMo30 13] -4 H ,0 except removal of water of crystallization up to 500 °C. Decomposition to various potassium molybdates takes place between 460 and 470 °C with the Se compound. 
  Reference    Z. Naturforsch. 48b, 399—403 (1993); eingegangen am 2. November 1992 
  Published    1993 
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 TEI-XML for    default:Reihe_B/48/ZNB-1993-48b-0399.pdf 
 Identifier    ZNB-1993-48b-0399 
 Volume    48 
63Author    Christian Robl, M. Ona FrostRequires cookie*
 Title    Na6[TeMo60 24l ' 22 H20 -A Layered Heteropoly Compound with the Chain-Like Polycation {N a3(H 20 ) n }^/,+  
 Abstract    Colourless triclinic single crystals of N a6[TeMo60 24] • 22 H-,0 were grown from aqueous so­ lution (space group P i, a = 1030.89(9), 6 = 1056.7(1), c = 1106.32(9) pm, a = 90.120(7), ß = 115.220(6), 7 = 105.195(7) , Z = 1, 295 K, 336 param eters, 3181 reflections, Rg = 0.0186). There are three crystallographically independent N a+ cations. Two of them are coordinated octahedrally by water molecules only. The third N a+ cation is bound to five H 20 and one oxy­ gen atom (0(4)) belonging to the Anderson-Evans type anion [TeMo60 24]6~. The sodium-cen­ tered coordination octahedra are linked by common edges exclusively formed by water mole­ cules to yield chain-like polycations {Na-,(H20) ,,} ^ + which are bound by the N a (l) -0 (4) con­ tact to the anions situated on crystallographic centers o f inversion forming a layer-like arrangement. Further connections "between the polycations and the [TeM o60 24]6" anions are established by hydrogen bonds involving all the oxygen atom s of the anion except 0(4) as al­ most equivalent proton acceptors regardless of their bonding mode to Te or Mo. 
  Reference    Z. Naturforsch. 48b, 404—408 (1993); received November 12 1992 
  Published    1993 
  Keywords    Hexamolybdotellurate, Layer Structure, Polycations, Crystal Structure Hydrogen Bonding 
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 TEI-XML for    default:Reihe_B/48/ZNB-1993-48b-0404.pdf 
 Identifier    ZNB-1993-48b-0404 
 Volume    48 
64Author    RostislavD. Lampeka, Zam Ira, D. Uzakbergenova, VictorV. SkopenkoRequires cookie*
 Title    Spectroscopic and X-Ray Investigation of Cobalt(III) Complexes with 2-Oximinocarboxylic Acids  
 Abstract    Mixed complexes of Co(III) with 2-oximinopropionic (H 2A) or 2-oximino-3-phenylpropionic (H 2B) acid and different amine (imidazole, benzimidazole, pyridine, yS-picoline, y-picoline) are reported. Characterization of the complexes was based upon ele­ mental analysis, conductivity and JR, 'H N M R, and electronic absorption spectra, and X-ray diffraction analysis. The organic ligands behave as 0 ,N donors via the carboxyl oxygen and the oxime nitrogen atoms. A trans-octahedral structure has been assigned to the bis(2-oximino-carboxylato)bis(am ine)cobalt(III) on the basis of 'H N M R data. The crystal and molecular structures of the complexes rra«5-[bis(2-oximinopropionato)bis-(imidazole)]-(I) and ^ • a«5'-[bis(2-oximinopropionato)bis(pyridine)]cobalt(III) (II) were deter­ mined. I crystallizes in space group P 2/« with a = 14.167(2), b = 8.774(_1), c = 14.785(2)Ä, ß = 113.37(1)°, Z = 4, Dca)c = 1.568 g e m '3. II crystallizes in space group P 1 with a = 9.122(2), b = 10.038(2), c = 11.759(2) A, a = 69.95(1)°, ß = 67.47(2)°, y = 69.49(2)°, Z = 2, Dcalc = 1.547 g-cm~3. The structures were refined to unweighted R factors of 0.036 and 0.028, respec­ tively. The coordination sphere around Co is pseudo-octahedral with the 2-oxim inopropionato ligands occupying four equatorial positions, and the amines in axial po­ sitions. 
  Reference    Z. Naturforsch. 48b, 409—417 (1993); received November 2 1992 
  Published    1993 
  Keywords    Cobalt, Oximiocarboxylic Acid, Amine, X-Ray 
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 Identifier    ZNB-1993-48b-0409 
 Volume    48 
65Author    Emerich Eichhorn, Anton Rieker, Bernd Speiser, Jürgen Sieglen, Joachim SträhleRequires cookie*
 Title    Electrochemistry of Oxygenation Catalysts, Part 2 + Improved Synthesis, Crystal Structure, and Electrochemical Properties of N,N-Bis(salicylidene)ethylenediaminatocobalt(III) Chloride  
 Abstract    N,N'-Bis(salicylidene)ethylenediaminatocobalt(III) hydroxide is treated with chloroform in methanol to yield the corresponding chloride in pure, crystalline form. Results of the crystal structure determination compare well with those in earlier reports of dimeric [Co(salen)Cl]2 units and incorporated CHC13 molecules. Electrochemical experiments in D M F and pyridine show that the chloride fully dissociates in these donor solvents. Thus, the quasireversible one-electron reduction to Co(salen) is observed in cyclic voltammograms. 
  Reference    Z. Naturforsch. 48b, 418—424 (1993) 
  Published    1993 
  Keywords    Oxygenation Catalyst, Cobalt Schiff-Base Complex, Crystal Structure, Electrochemistry 
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 TEI-XML for    default:Reihe_B/48/ZNB-1993-48b-0418.pdf 
 Identifier    ZNB-1993-48b-0418 
 Volume    48 
66Author    Requires cookie*
 Title    Zur Reaktion von (COD)PtCl2  
 Abstract    mit l,4-Bis-[di(f-butyl)phosphino]butan (dtbpb). 
  Reference    Z. Naturforsch. 48b, 425 (1993) 
  Published    1993 
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 TEI-XML for    default:Reihe_B/48/ZNB-1993-48b-0425.pdf 
 Identifier    ZNB-1993-48b-0425 
 Volume    48 
67Author    Requires cookie*
 Title    Electrochemical Synthesis of N-Oxopyridine-2-thionate Complexes of Cd(II): The Crystal Structure of Bis(2,2'-bipyridine)(N-oxopyridine-2-thionate) Cadmium(II) Perchlorate 1/4 (Bipyridine)  
  Reference    Z. Naturforsch. 48b, 431 (1993) 
  Published    1993 
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 TEI-XML for    default:Reihe_B/48/ZNB-1993-48b-0431.pdf 
 Identifier    ZNB-1993-48b-0431 
 Volume    48 
68Author    Karl-Friedrich Tebbe, Arista KavoosianRequires cookie*
 Title    Untersuchungen an Polyhalogeniden, XII [1] Darstellung und Kristallstruktur von [K(Crypt-2.2.2)]2I12 Studies on Polyhalides, XII [1] Preparation and Crystal Structure of [K(Crypt-2.2.2)]2I 12  
 Abstract    A norganische Chem ie der U niversität zu K öln. G re in straß e 6, D -W -5000 Köln 41 Z. N atu rfo rsch . 48b, 4 3 8 -4 4 2 (1993); eingegangen am 4. N ovem ber 1992 C ryptate. Polyiodide. D odeeaiodide. Potassium C om plex, C rystal S tructure T he new com p o u n d [K (C rypt-2.2.2)]; In has been p rep ared by the reaction o f [K (C rypt-2.2.2)]I with iodrne in a m ixture o f ethanol and dich lo ro m eth an e. It crystallizes in the triclinic space group P 1 with a = 1201.5(5), b = 1213,4(5), c = 1432,1(2) pm , a = 69,1 1(2), ß = 72,01(2), 7 = 61.93(3) and Z = 1. The crystal stru ctu re has been refined to RF = 0.030 for 2882 reflections. The structure m ay be described as a layerlike packing o f I P2" anions and [K (C rypt-2.2.2)]" cations. The anion with point sym m etry C, consists o f tw o p entaiodide groups and a bridging iodine molecule. 
  Reference    Z. Naturforsch. 48b, 438 (1993) 
  Published    1993 
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 TEI-XML for    default:Reihe_B/48/ZNB-1993-48b-0438.pdf 
 Identifier    ZNB-1993-48b-0438 
 Volume    48 
69Author    Requires cookie*
 Title    Zur Chemie der 4,6-Dioxo-l,3,5,2-triazaphosphinane, Teil III  
 Abstract    Darstellung von 4,6-D ioxo-l,3,5,2 A3-, 4,6-Dioxo-l,3>5,2 XA-und 4,6-D ioxo-l ,3»5,2 A5-triazaphosphinanen 
  Reference    Z. Naturforsch. 48b, 443 (1993) 
  Published    1993 
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 TEI-XML for    default:Reihe_B/48/ZNB-1993-48b-0443.pdf 
 Identifier    ZNB-1993-48b-0443 
 Volume    48 
70Author    Requires cookie*
 Title    N a2[SnAs2], die erste Zintl-Phase mit einem [SnAs2]-Raumnetz aus adamantan-analogen [Sn4A s10]-Einheiten  
  Reference    Z. Naturforsch. 48b, 452 (1993) 
  Published    1993 
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 Identifier    ZNB-1993-48b-0452 
 Volume    48 
71Author    EckehardV. Dehmlow, C. Hristof BollmannRequires cookie*
 Title    Verbesserte präparative Darstellung von Polyisopropyl-und Poly-terf-butylcyclopentadienen [ 1 ] Improved Preparation of Polyisopropyl-and -terf-butylcyclopentadienes  
 Abstract    F a k u ltät für Chem ie, U niv ersität Bielefeld, U niversitätsstraße. D-W -4800 Bielefeld 1 
  Reference    Z. Naturforsch. 48b, 457 (1993) 
  Published    1993 
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 Identifier    ZNB-1993-48b-0457 
 Volume    48 
72Author    Rupert Bauer, Christian KönigsteinRequires cookie*
 Title    Inter-und intramolekularer Energietransfer und Ladungstrennung in kovalent gebundenen Cyanin-Farbstoff-Viologen-Systemen Inter-and Intramolecular Energy Transfer and Charge Separation in Covalently Linked Cyanine Dye-Viologen Systems  
 Abstract    physikalische C hem ie, T echnische U n iv ersität W ien, G etreid em ark t 9/156, A-1060 Wien 
  Reference    Z. Naturforsch. 48b, 461 (1993) 
  Published    1993 
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 Identifier    ZNB-1993-48b-0461 
 Volume    48 
73Author    Uwe Hilgers, Rüdiger BlumeRequires cookie*
 Title    Titrimetrische Analyse von Ionenaustauschgleichgewichten bei Unvollständigkeit der Titrationskurven Titrimetric Analysis of Ion-Exchange Equilibria in the Case of Incomplete T itration Curves  
  Reference    Z. Naturforsch. 48b, 471 (1993) 
  Published    1993 
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 TEI-XML for    default:Reihe_B/48/ZNB-1993-48b-0471.pdf 
 Identifier    ZNB-1993-48b-0471 
 Volume    48 
74Author    Degui Wang, Knut Hildenbrand, Johannes Leitich, Heinz-Peter Schuchmann, Clemens Von SonntagRequires cookie*
 Title    pH-Dependent Tautomerism and pKa Values of Phloroglucinol (1,3,5-Trihydroxybenzene), Studied by 13C NM R and UV Spectroscopy  
 Abstract    M ax -P lan ck -In stitu t fü r S trahlenchem ie, S tiftstraße 3 4 -3 6 , D-45413 M ülheim an der R uhr Z. N atu rfo rsch . 48b, 4 7 8 -4 8 2 (1993); received N ovem ber 2, 1992 13C N M R Spectra, UV Spectra, Phloroglucinol ,3C N M R an d UV spectroscopy o f aqu eo u s phloroglucinol over the pH range 2.6 to 15 c o n ­ firm s th a t the d ian io n exists p red o m in an tly as the keto form (3,5-dihydroxy-2,5-cyclohexadi-enone dian io n 2 c, <5(>CH-,) = 46 ppm , <5(>CH) = 101 ppm , <5(C\C5) = 188 ppm , <5(C') = 197 ppm). All o th er states o f ionization, i.e. n eutral l a (c>(>CH) = 98 ppm , <J(C',C3,C 5) = 160.9 ppm), m o n o an io n lb (<5(>CH) = 98 ppm , <5(C',C3,C 5) = 164.4 ppm) and trian io n Id (<5(>CH) = 100 ppm , <5(C',C3,C 5) = 170 ppm) exist p redom inantly as the benzene form s. T here is som e evidence, consisting o f a b ro ad en in g o f the signals from the 3,5-dihydroxy-2,5-cyclohexadienone d ianion 2c in the pH range from ~ 9 w here they start to ap p ear, to — 10 w here they a p p ro ach their m axim um values, for a small b u t noticeable equilibrium c o n c en tra ­ tion o f the cyclohexen-l-ol-3,5-dione (m o n o an io n) 3b o r the 3,5-dihydroxy-2,5-cyclohexadi-enone (m o n o an io n) 2b form s. O th er keto form s have not been detected. The th ird p K a tu rn s o u t to be close to 14. 
  Reference    Z. Naturforsch. 48b, 478 (1993) 
  Published    1993 
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 Identifier    ZNB-1993-48b-0478 
 Volume    48 
75Author    Berthold Buchholz3, Pen-Yuan Linb, Andreas Onistschenko3, Helmut Stamm3Requires cookie*
 Title    Aziridines, 61 [1] Ring Opening of 2,2-Dimethyl-1-sulfonylaziridines by Anilines: Regioselectivity and Revised Structure of Main Products  
  Reference    Z. Naturforsch. 48b, 483 (1993) 
  Published    1993 
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 Identifier    ZNB-1993-48b-0483 
 Volume    48 
76Author    Requires cookie*
 Title    Reaktionen von Derivaten der (Diphenylmethylen-amino)-essigsäure mit Schwefelkohlenstoff und Phenylisothiocyanat sowie Kristall-und Molekülstruktur des 2-(Diphenylmethylen-amino)-2-( 1,3-dithian-2-yliden)-essigsäuremethy lesters  
  Reference    Z. Naturforsch. 48b, 493 (1993) 
  Published    1993 
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 Identifier    ZNB-1993-48b-0493 
 Volume    48 
77Author    Requires cookie*
 Title    Synthesis of a Dihydroxy-Substituted Aminoxyl Spin Label and its Crown Ether and Cyclic Diester Derivatives  
 Abstract    Y ong-K ang Z h an g* 3 and D e-K an g Shenb Institute o f Chem istry, A cadem ia Sinica. Beijing 100080, C hina Z. N aturforsch. 48b, 5 0 5 -5 1 0 (1993); received S eptem ber 21, 1992 
  Reference    Z. Naturforsch. 48b, 505 (1993) 
  Published    1993 
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 Identifier    ZNB-1993-48b-0505 
 Volume    48 
78Author    OmeRequires cookie*
 Title    o i c °  
  Reference    Z. Naturforsch. 48b, 517 (1993) 
  Published    1993 
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 TEI-XML for    default:Reihe_B/48/ZNB-1993-48b-0517.pdf 
 Identifier    ZNB-1993-48b-0517 
 Volume    48 
79Author    Requires cookie*
 Title    Chalcogeno-substituierte Triphenylmethylium-Ionen vom inversen Malachitgrün-T yp  
 Abstract    C halcogeno-Substituted B is-triphenylm ethylium Ions o f the Inverse M alachite G reen Type D ieter Hellwinkel* und H einz Stahl O rganisch-C hem isches In stitu t der U n iv ersität H eidelberg, Im N euenheim er Feld 270, D -W -6900 H eidelberg 1 Herrn Kollegen Ullrich Schöllkopf, Göttingen, zum 65. G eburtstag gew idm et 
  Reference    Z. Naturforsch. 48b, 521 (1993) 
  Published    1993 
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 Identifier    ZNB-1993-48b-0521 
 Volume    48 
80Author    W. Afa, A. Bdelqader, SaimÖ. Zkar, N.Bekir PeynirciogluRequires cookie*
 Title    Photocatalytic 1,4-Hydrosilation of 1,3-Butadiene with Triethylsilane  
 Abstract    D ep artm en t o f C hem istry, M iddle E ast T echnical U niversity, 06531 A n k a ra , T urkey Z. N atu rfo rsch . 48b, 5 3 9 -5 4 0 (1993); received D ecem ber 8, 1992 H exacarbonyl(chrom ium an d m olybdenum), B utadiene, T riethylsilane, H y d ro silatio n , P hotocatalysis 
  Reference    Z. Naturforsch. 48b, 539 (1993) 
  Published    1993 
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 Identifier    ZNB-1993-48b-0539_n 
 Volume    48 
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