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1983 (307)
1Author    Rüdiger Kniep, Lutz Körte, Dietrich MootzRequires cookie*
 Title    Kristallstrukturell von Verbindungen A2X2 (A = S, Se; X = Cl, Br) Crystal Structures of Compounds A2X2 (A = S, Se; X = Cl, Br)  
 Abstract    The crystal structures of compounds A2X2 (A = S, Se; X = Cl, Br) contain molecules X-A-A-X with dihedral angles between 83.9° and 87.4°. Three different types of molecular packing are realized: S2CI2, S2Br2 (a-Se2Br2) and /?-Se2Br2(Se2Cl2). Details of molecular geometries as well as crystal structures are discussed. 
  Reference    (Z. Naturforsch. 38b, 1—6 [1983]; eingegangen am 20. August 1982) 
  Published    1983 
  Keywords    Sulfur(I) Halides, Selenium(I) Halides, Crystal Structure 
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 TEI-XML for    default:Reihe_B/38/ZNB-1983-38b-0001.pdf 
 Identifier    ZNB-1983-38b-0001 
 Volume    38 
2Author    Herman Winter, JohanC. Van De GrampelRequires cookie*
 Title    Derivatives of NPCI^NSOCl), and (NPC12)2NS0C1, Part XXI [1]. The Synthesis of a Spiro Phosphazene Derivative of NPCl^NSOPh^  
 Abstract    The preparation of the spirocyclic compounds eis-and £rans-NP[(NPCl2)2NCH3](NSOPh)2 from eis-and Zrans-NPCl2(NSOPh)2 is described as well as the synthesis of the inter-mediates. The 31 P NMR data are discussed. 
  Reference    (Z. Naturforsch. 38b, 7 [1983]; received August 23 1982) 
  Published    1983 
  Keywords    Phosphorus-Sulfur-Nitrogen Heterocycles, Spirocyclic Derivatives, NMR Spectra 
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 TEI-XML for    default:Reihe_B/38/ZNB-1983-38b-0007.pdf 
 Identifier    ZNB-1983-38b-0007 
 Volume    38 
3Author    PeterG. Jones, GeorgeM. Sheldrick, Einhard Schwarzmann, Andreas VielmäderRequires cookie*
 Title    Darstellung und Kristallstruktur von Di-gold(III)bis(selenit)oxid, Au2(Se03)20 Preparation and Crystal Structure of Di-gold(III) Bis(selenite) Oxide, Au2(Se03)20  
 Abstract    Au2(Se0s)20 was prepared from gold and excess selenic acid in a sealed tube at 533 K. The crystal structure [P6a2, a = 659.2(2), b = 1183.7(3), c = 399.8(1) pm, Z = 2,R = 0.087] was determined; gold atoms are bridged by oxide ions (lying on twofold axes) and selenite ions. The extended structure consists of polymeric layers parallel to the ««/-plane. The light atom positions are inaccurate because of the presence of a heavy atom in a polar space group. 
  Reference    (Z. Naturforsch. 38b, 10—11 [1983]; eingegangen am 20. September 1982) 
  Published    1983 
  Keywords    Crystal Structure, Sealed-tube Synthesis, Gold(III), Selenite, Oxide 
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 TEI-XML for    default:Reihe_B/38/ZNB-1983-38b-0010.pdf 
 Identifier    ZNB-1983-38b-0010 
 Volume    38 
4Author    Kurt Klepp, Weif BrongerRequires cookie*
 Title    Na6CoS4 -ein Thiocobaltat mit isolierten CoS4-Anionen Na6CoS4 -A Thiocobaltate with Isolated C0S4 Anions  
 Abstract    NaeCoS4 crystallizes in the hexagonal space group P 63111c with a —890.9(2) pm and c = 687.8(2) pm, Z = 2. The crystal structure was determined from four circle diffracto-meter data and refined to a conventional .ff-value of 0.020. NaöCoS4 is isotypic with NaeZnC>4. The crystal structure can be derived from a h.c.p. arrangement of S atoms. Co atoms occupy tetrahedral voids, the resulting CoS4-tetrahedra being almost regular with an average Co-S distance of 235 pm. Na atoms occupy tetrahedral and octahedral voids in the ratio 1:1. 
  Reference    (Z. Naturforsch. 38b, 12—15 [1983]; eingegangen am 27. August 1982) 
  Published    1983 
  Keywords    Crystal Structure, Ternary Chalcogenides, Cobalt Compounds 
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 TEI-XML for    default:Reihe_B/38/ZNB-1983-38b-0012.pdf 
 Identifier    ZNB-1983-38b-0012 
 Volume    38 
5Author    W. S. SheldrickRequires cookie*
 Title    Characterisation of a Binary Transition Metal Complex of a Purine 3 -Nucleotide, {[Cua(3 -GMP)2(3 -GMPH)2(H20)5] 7 H20}". [1] Phosphate-only Binding of Copper(II)  
 Abstract    Guanosine 3'-Monophosphate, Copper(II) Complex, Phosphate-only Binding, X-ray {[Cu3(3'-GMP)2(3'-GMPH)2(H20)5] • 7 H20}" (1) was isolated from an aqueous solution of Cu(N03)2 and guanosine 3'-monophosphate at a pH of 4.4. 1 is monoclinic space group C 2 with a = 29.140(7), b = 6.865(5), c = 16.980(7)Ä, ß = 90.31(3)°, Z = 2, Dc = 1.81 g -cm-". The structure was refined to R — 0.065 with i?w = 0.060 for 2642 independent reflections. It is disordered about a crystallographic diad axis with one of the copper atoms Cu(2) sited on this axis. This and the other independent copper atom Cu(l) both display square pyramidal geometries. Cu(l) binds N(7) of a guanine base, two phosphate O atoms of nucleotide molecules not symmetry-related to one another and two water oxygens. The guanine base involved in this coordination adopts a syn-conformation relative to the ribose ring with = —118.5°. Cu(2) is coordinated by four phosphate O atoms of different nucleotide molecules and one water oxygen. The second guanine base, which is not involved in metal binding, displays the anZi-conformation relative to the ribose ring. 
  Reference    (Z. Naturforsch. 38b, 16—19 [1983]; received September 6 1982) 
  Published    1983 
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 TEI-XML for    default:Reihe_B/38/ZNB-1983-38b-0016.pdf 
 Identifier    ZNB-1983-38b-0016 
 Volume    38 
6Author    Bernt Krebs, Marita Hucke, Michael Hein, Andreas SchäfferRequires cookie*
 Title    Monomere und dimere Oxotrihalogenoselenate(IV): Darstellung, Struktur und Eigenschaften von [As(C6H5)4]SeOCl3 und [N(C2H5)4]SeOCl3 Monomerie and Dimeric Oxotrihalogenoselenates(IV): Preparation, Structure and Properties of [As(C6H5)4]SeOCl3 and [N(C2H5)4] SeOCl3  
 Abstract    The monomeric SeOCl3~ ion, which can be prepared as the tetraphenylarsonium salt from SeOCl2 and As(C6Hs)4C1, was structurally characterized by a low-temperature single crystal X-ray diffraction analysis. [As(C6Hs)4]SeOCl3 is monoclinic, space group P2i/c, with a = 9,332(3), b = 13,761(4), c = 18,985(6) A, ß = 110,97(3)° (at —135 °C), Z = 4; it contains a novel type of y>-trigonal bipyramidal oxotrichloroselenate(IV) anion which is not associated to dimers or polymer chains as in known structures. The equatorial positions are occupied by doubly bonded oxygen (Se-O 1,601(3) Ä) and by one Cl (Se-Cl 2,234(1) A), the axial Se-Cl bonds (2,430(1) and 2,475(1) A) being significantly longer. [N(C2H5)4]SeOCl3, which was obtained as crystals by oxidation of trichloroselenate(II), is triclinic, space group P I, with a = 10,607(3), b = 8,950(2), c = 8,862(2) A, a = 119,79(2)°, ß = 101,07(2)°, y = 96,28(2)°, Z = 2. The X-ray structure analysis shows the anions to be present as centrosymmetric dimers Se202Cl6 2 " like in the [P(CeH5)4] + salt, with two tetragonal SeOCU pyramids linked through a C1---C1 edge and the lone pairs trans to the axial Se-0 bonds (1,589(4) A). Se-Cl bond lengths are 2.270(1) and 2,351(2) A (terminal); 2,698(1) and 2,920(1) A (bridging). The results show that the nature of the reaction products of the Lewis acid SeOCl2 with halogenides as bases changes very sensitively with small variations in cations and environment. The vibrational spectra are discussed. 
  Reference    (Z. Naturforsch. 38b, 20—29 [1983]; eingegangen am 23. September 1982) 
  Published    1983 
  Keywords    Oxohalogenoselenates, Crystal Structure, Selenium, Inert Electron Pair, Selenium Oxychloride 
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 TEI-XML for    default:Reihe_B/38/ZNB-1983-38b-0020.pdf 
 Identifier    ZNB-1983-38b-0020 
 Volume    38 
7Author    W. Petz, S. KremerRequires cookie*
 Title    Darstellung und Eigenschaften von Fe[ClC(COOEt)2]3 Synthesis and Properties of Fe[ClC(COOEt)2]3  
 Abstract    Magnetism, EPH, Iron(3 +) Complex, Oxidation Fe2(CO)9 reacts with Cl2C(COOEt)2 to give the paramagnetic complex Fe[ClC(COOEt)2]3 in high yield. The magnetic and spectroscopic properties of this complex are discussed. 
  Reference    (Z. Naturforsch. 38b, 30—33 [1983]; eingegangen am 15. Juni 1982) 
  Published    1983 
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 Identifier    ZNB-1983-38b-0030 
 Volume    38 
8Author    Lutz Rösch, Gerald Altnau, Carl Krüger, Y.-H TsayRequires cookie*
 Title    Röntgenstrukturuntersuchungen an Trimethylsilylaluminiumverbindungen X-Ray Crystal Study of Trimethylsilylaluminium Compounds  
 Abstract    Structure, Tris(trimethylsilyl)aluminium, Sodium-tetrakis(trimethylsilyl)aluminate The crystal and molecular structures of three trimethylsilylaluminium compounds -tris(trimethylsilyl)aluminium coordinated to a diethylether molecule (1), sodium-tetrakis-(trimethylsilyl)aluminate coordinated to two toluene molecules (2 b) and unsolvated sodium-tetrakis(trimethylsilyl)aluminate (2 a) -have been determined by X-ray structure analysis. In all three compounds the aluminium is tetrahedrally coordinated, the Al-Si-distances lying between 2.44 and 2.49 A. (1) is monomeric and (2a) and (2b) form linear chains resulting from contact-ion pair interactions. 
  Reference    (Z. Naturforsch. 38b, 34—41 [1983]; eingegangen am 14. September 1982) 
  Published    1983 
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 Identifier    ZNB-1983-38b-0034 
 Volume    38 
9Author    Ramesh Kapoor, Ramneek SharmaRequires cookie*
 Title    Anhydrous Chromium(III) Carboxylates: Reactions of Cr03 with Carboxylic Acid Anhydrides  
 Abstract    Chromium(VI) oxide reacts with excess of carboxylic acid anhydrides [(RC0)20 where R = CH3, C2H5, n-C3H7 and CHCI2] to give pure chromium(III) carboxylates. Their IR and 1H NMR spectra suggest the presence of two different types of carboxylate groups. Magnetic susceptibility and absorption spectra favour an octahedral geometry around Cr. 
  Reference    (Z. Naturforsch. 38b, 42—44 [1983]; received August 28 1982) 
  Published    1983 
  Keywords    Anhydrous Chromium(III) Carboxylates, Chromium(VI) Oxide, Carboxylic Acid Anhydrides, IR Spectra, Magnetic Moment 
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 TEI-XML for    default:Reihe_B/38/ZNB-1983-38b-0042.pdf 
 Identifier    ZNB-1983-38b-0042 
 Volume    38 
10Author    Angelika Sebald, Bernd Wrackmeyer, Wolfgang BeckRequires cookie*
 Title    Kernresonanzspektroskopische Untersuchungen OH-, 13 C-, 31 P-, 195 Pt-NMR) an Alkinyl-Komplexen von Pt n , Pd n und Ni" Nuclear Magnetic Resonance ^H-, 13 C-, 31 P-, 195 Pt-NMR)-Studies of Alkynyl Derivatives of Pt 11 , Pd 11 and Ni 11  
 Abstract    The NMR parameters (X H, 13 C, 31 P, 195 Pt) of compounds of the type eis-and trans-[M(C=C-R)2(PR'3)2] (M = Ni, Pd, Pt) are reported. The chemical shifts <5 13 C (M-C=C; R) and <5 195 Pt (together with UV data) indicate the presence of jz-backbonding from the metal into the orbitals. This also explains some unusual features of the coupling constants J(= 13 C 1 H), J(i 3 C= 13 C) and J(195 Pt 13 C=). The NMR parameters reflect an increase in the amount of yr-backbonding for Pt < Pd < Ni. 
  Reference    (Z. Naturforsch. 38b, 45—56 [1983]; eingegangen am 1. Oktober 1982) 
  Published    1983 
  Keywords    Alkynyl Ptn, Pdn-, Nin-complexes, Multinuclear NMR 
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 TEI-XML for    default:Reihe_B/38/ZNB-1983-38b-0045.pdf 
 Identifier    ZNB-1983-38b-0045 
 Volume    38 
11Author    Hans Hartl, Irene Brüdgam, Farbod Mahdjour-Hassan-AbadiRequires cookie*
 Title    Synthese und Strukturuntersuchungen von Iodocupraten(I): II. Diiodocuprate(I) RCuI2 mit isoherten Ketten ^ [Cul4 2~] * R 1 = N-Methylpyridinium, R 2 = Dimethyl ( 3 -dimethylamino -2 -aza -2 -propenyliden ) ammonium [1] Syntheses and Structure Analyses of Iodocuprates(I): II. Diiodocuprates(I) RCUL2 with Isolated Chains [CULI/2~]; R 1 = N-Methylpyridinium, R 2 = Dimethyl(3-dimethylamino-2-aza-2-propenyliden) Ammonium  
 Abstract    N-Methylpyridinium-diiodocuprate(I), CßHgNCuI^ and dimethyl(3-dimethylamino-2-aza-2-propenyliden)ammonium-diiodocuprate(I), C6H14N3CUI2, are obtained by reacting Cu with C6H8NI3 or C6H14N3I3 in acetone. Both compounds are built up by the organic cations and chains of edge sharing tetrahedra<jo[Cul4/2-]. The iodocuprate(I) anions are in intimate contact with the cations via intermolecular I • • • C interactions. Though nearly the same average Cu-I distance of 267.2 or 268.2 pm was found for both iodocuprate(I) anions there are different Cu-Cu distances (301-354 pm). 
  Reference    (Z. Naturforsch. 38b, 57—61 [1983]; eingegangen am 30. September 1982) 
  Published    1983 
  Keywords    Diiodocuprates(I), Synthesis, Crystal Structure 
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 TEI-XML for    default:Reihe_B/38/ZNB-1983-38b-0057.pdf 
 Identifier    ZNB-1983-38b-0057 
 Volume    38 
12Author    Hubert Schmidbaur, Stefan Schnatterer, KailashC. Dash, ArefA M AlyRequires cookie*
 Title    Gold(I)-Bis(  
 Abstract    diphenylphosphino)amid und einige Gold(I)-Bis(diarylphosphino)methanide mit sterisch anspruchsvollen Arylsubstituenten Gold(I)-bis(diphenylphosphino)amide and Some Gold(I)-bis(diarylphosphino)methanides with Bulkyl Aryl Substituents Intensely yellow coloured, insoluble gold(I)-bis(diarylphosphino)amides, [(CeH^P^NAu, 1, is obtained from lithiated bis(diphenylphosphino)amine and AuCl complexes of tertiary phosphines. 1 is assigned a dimeric eightmembered ring structure on the basis of its 197 Au-Mößbauer spectrum and of a direct analogy with the corresponding bis(phosphino)methanide complexes, whose structure has recently been confirmed by X-ray diffraction. 
  Reference    (Z. Naturforsch. 38b, 62—66 [1983]; eingegangen am 16. September 1982) 
  Published    1983 
  Keywords    Gold Compounds, Metallocycles, Phosphino-amides, Phosphino-methanides, Steric Effects 
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 TEI-XML for    default:Reihe_B/38/ZNB-1983-38b-0062.pdf 
 Identifier    ZNB-1983-38b-0062 
 Volume    38 
13Author    Werner Sieber, Mathias Wolfgruber, Dietmar Neugebauer, Olli Orama, FritzR. KreißlRequires cookie*
 Title    Übergangsmetallketen-Verbindungen, XII [1] Darstellung und Struktur von ?f-C5H5(CO)2 [P(CH3)3]W-C = C-C3H5 Compounds of Transition Metal Ketenes, XII [1] Synthesis and Structure of j?5-C5H5(CO)2[P(CH3)3]W-C =C-C3H5  
 Abstract    Transition Metal-Substituted Acetylene, X-ray Dicarbonyl(ry 5 -cyclopentadienyl)(^ 1 -cyclopropylketenyl)(trimethylphosphane)tungsten reacts with carbon monoxide under reduction of the ketene moiety forming a (T-bonded acetylene compound. Reaction conditions, spectroscopic data and the X-ray structure of the new compound are reported. Übergangsmetallsubstituierte Ketene des Typs 
  Reference    (Z. Naturforsch. 38b, 67—70 [1983]; eingegangen am 7. Oktober 1982) 
  Published    1983 
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 Identifier    ZNB-1983-38b-0067 
 Volume    38 
14Author    Walter MaringgeleRequires cookie*
 Title    Neue Synthesewege zu cyclischen N-Silylharnstoffen und thioharnstoffen Reactions of Metal and Metalloid Compounds with Polyfunctional Molecules, XXXVII [1] New Syntheses of Cyclic N-Silylureas and -thioureas  
 Abstract    N-Silylated Ureas and Thioureas, Silicon Tetrachloride, Bis(dimethylamino)dimethylsilane N,N'-Diorganylureas react with silicon tetrachloride to give the l,3,5-triaza-2-silacyclo-hexan-4,6-diones 1-4, in case of N,N'-dicyclohexylurea to give dicyclohexylcarbodiimide. By reacting bis(diethylamino)dimethylsilane with N,N'-diorganylureas and thioureas, resp., one obtains l,3,5-triaza-2,4-disilacyclohexan-6-ones 6, 10, 13-15, l-oxa-3,5-diaza-6-silacyclohexan-4-ones 5, 9, l,3,5-triaza-2-silacyclohexan-4,6-diones 7, 11, 1,3-dioxa-5-aza-2,6-trisilacyclohexanes 8,12, l,3,5-triaza-2,4-disilacyclohexan-6-thiones 16-25 or the organylamino-diethylamino-dimethylsilanes 26-28. The compounds were characterized analytically and spectroscopically. 
  Reference    (Z. Naturforsch. 38b, 71—80 [1983]; eingegangen am 30. August 1982) 
  Published    1983 
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 TEI-XML for    default:Reihe_B/38/ZNB-1983-38b-0071.pdf 
 Identifier    ZNB-1983-38b-0071 
 Volume    38 
15Author    Karl Wieghardt, Ursula Bossek, Martina Guttmann, Johannes WeissRequires cookie*
 Title    Metallkomplexe der Liganden  
 Abstract    1.4.7-Triazacyclononan-N.N .N -tris-2-ethansulfonat (TES) und 1.4.7-Triazacyclononan-N.N' .N'' -trisethylacetat (TEA). Die Kristallstrukturen von Na[Ni(TES)(H20)] • 5 H20 und Na[Cu(TES)] • 3 H20 Transition Metal Complexes Containing the Ligands 1,4,7-Triazacyclononane-N,N',N"-tris-2-ethanesulfonate (TES) and l,4,7-Triazacyclononane-N,N , ,N"-tris-ethylacetate (TEA). The Crystal Structures of Na[Ni(TES) (H20)] • 5H20 and of Na[Cu(TES)] • 3H20 The syntheses of two new, potentially hexadentate ligands with an N3O3 donor set is reported: l,4,7-triazacyclononane-N,N , ,N"-tris-2-ethanesulfonate (TES) and 1,4,7-tria-zacyclononane-N,N',N"-tris-ethylacetate (TEA). Complexes of the divalent transition metals Co(II), Ni(II), Cu(II) containing these ligands have been prepared. The kinetics of the reactions of [Co n (TEA)H20] 2 + and [Co II (TCTA)]-(TCTA= 1,4,7-triazacyclononane-N^^N'^tris-acetate) with [Fe m (CN)6] 3 ~, respectively, have been measured. A stable binuclear [Co(TEA)(CN)6Fe]~ species has been characterized in solution whereas the reaction of [Co(TCTA)]-with [Fe(CN)6] 3 -yields [Co in TCTA] and [Fe(CN)6] 4 -via an outer-sphere electron transfer reaction (k = 5,9 x 10 3 1 mol -1 sec -1 ; 25 °C, I = 0,26 M). Na[Ni(TES)H20] • 5H20 crystallizes in the triclinic space group P I (C^-No 2) with cell constants a = 806,7(4), b = 1468,4(8), c = 2317,9(8) pm, a = 72,36(4)°, ß = 83,48 (3)°, y = 81,99(4)°, and Z = 4. The nickel(II) center is in a distorted octahedral environment of a pentadentate TES ligand (N3Ü2)_and a coordinated H20. Na[Cu(TES)] 3H20 crystal-lizes in the triclinic space group P I (C^-No 2) w T ith cell constants a = 747,3(3), b — 1082,6(5), c = 1459,3(9) pm, a = 81,13(5)°, ß = 84,75(4)°, y = 79,39(3)°, and Z = 2. The copper(II) center is in a distorted quadratic pyramidal environment of a pentadentate TES ligand. Each of the complex anions contains one uncomplexed CH2-CH2-SC>3 _ group. 
  Reference    (Z. Naturforsch. 38b, 81—89 [1983]; eingegangen am 27. September 1982) 
  Published    1983 
  Keywords    Crystal Structure, O-Coordinated R-S03-group, Metal Complexes 
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 TEI-XML for    default:Reihe_B/38/ZNB-1983-38b-0081.pdf 
 Identifier    ZNB-1983-38b-0081 
 Volume    38 
16Author    Monomeres, Helmut Endres, Nihat Gene, Dietrich NötheRequires cookie*
 Title    Oxamidoximkomplexe des Kupfers: Structures and EPR Spectroscopic Properties  
 Abstract    Chloro(oxamidoximato)(oxamidoxim)kupfer(II) und polymeres Dichloro(oxamidoxim)kupfer(II). Strukturen und EPR spektroskopische Eigenschaften Oxamide Oxime Complexes of Copper(II): Monomeric Chloro(oxamidoximato)(oxamidoxim)copper(II) and Polymerie Dichloro(oxamidoxim)copper(II). CU(C2H6N402)(C2HSN402)C1 (1) crystallizes in the monoclinic space group P2i/c, a = 8.191(4), b = 10.746(3), c = 13.340(7) Ä, ß = 104.94(4)°, V = 1134.5 A 3 , Z = 4, dc = 1.96 gem -3 , final Rw = 0.029 for 1785 reflections. In the monomeric complex molecules Cu is coordinated in the shape of a square pyramid with Cl at the apex. In the basal plane only one intramolecular H bridge exists. Cu(C2HeN402)Cl2 (2), crystallizes in the monoclinic space group Pc, a = 7.708(7), b = 3.751(1), c= 13.377(12) Ä, ß = 105.97(4)°, V = 371.8Ä 3 , Z = 2, dc = 2.25 gem" 3 , final Rw — 0.070 for 903 reflections. The stacking of the nearly planar complex units along b leads to a polymeric structure where Cu is additionally coordinated by a Cl atom, and shows a loose interaction with an oxime N atom of an adjacent monomer. The EPR signal intensity shows Curie-Weiss behaviour in the temperature range 110 K-420 K. 
  Reference    (Z. Naturforsch. 38b, 90—95 [1983]; eingegangen am 4. Oktober 1982 1) 
  Published    1983 
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 Identifier    ZNB-1983-38b-0090 
 Volume    38 
17Author    Wilfried Peters, Gerhard HageleRequires cookie*
 Title    Kernresonanzspektroskopische Untersuchungen an Organophosphorverbindungen - Thiophosphorylbromide RR P(S)Br: R,R =CH3, C2H5, f-C3H7, t-C4H9 NMR Studies on Organophosphorous Compounds -Thiophosphorylbromides RR'P(S)Br  
 Abstract    NMR spectra of dialkylthiophosphoryl bromides RR'P(S)Br are analyzed. Methods are demonstrated for C2H5(t-C3H7)P(S)Br. A correlation between <53ip in the 31 P NMR spectra and the number of y3-methyl groups is discussed. 
  Reference    (Z. Naturforsch. 38b, 96—102 [1983]; eingegangen am 23. August 1982) 
  Published    1983 
  Keywords    Dialkylthiophosphoryl Bromides, NMR Spectra, X H NMR Spectra, 31 P NMR Spectra 
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 Identifier    ZNB-1983-38b-0096 
 Volume    38 
18Author    Hans Zimmer, Madhusudan Jayawant, Adel Amer, BruceS. AultRequires cookie*
 Title    Reactions of Alkylamino-and Dialkylaminotriphenylphosphonium Halides with Halogens and Interhalogen Compounds; Formation of Alkylaminotriphenylphosphonium Polyhalides  
 Abstract    Alkylamino-and cycloalkylaminotriphenylphosphonium halides react with elemental halogens or interhalogen compounds to afford alkylamino-or cycloalkylaminotriphenyl-phosphonium trihalides. The stability of these trihalides depends on the cation as well as the trihalide anion. The assignment of a trihalide structure to these compounds was based on elemental analysis and on IR-and Raman spectroscopic evidence. Most stable are the tribromide and [1X2]° salts. During all reactions involving N-alkylamino-and N-cyclo-alkylaminotriphenylphosphonium halides and elemental halogens an N-halogenation of the cation was not observed. 
  Reference    (Z. Naturforsch. 38b, 103—107 [1983]; received September 20 1982) 
  Published    1983 
  Keywords    Halides, IR Spectra, Raman Spectra 
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 Identifier    ZNB-1983-38b-0103 
 Volume    38 
19Author    Jürgen Schallenberg, Eckart MeyerRequires cookie*
 Title    Simple Syntheses of 3-Substituted Indoles and their Application for High Yield 14 C-Labelling  
 Abstract    Methods are described which allow the synthesis of several plant indole alkaloids and their metabolites at different scales. Compounds synthesized include gramine (1) (3-di-methylaminomethylindole) which is directly derived from indole, while its biosynthetic precursors 3-aminomethylindole (3) and 3-methylaminomethylindole (2) as well as indole-3-carboxylic acid (7) are synthesized via indole-3-aldehyde (6). Slight changes of the experimental conditions allow syntheses with high yields not only at the molar but also at the /imolar level. This is extremely useful when isotope labelled compounds of high specific radioactivity are required for studies of plant metabolism. 
  Reference    (Z. Naturforsch. 38b, 108—112 [1983]; received July 22 1982) 
  Published    1983 
  Keywords    3-Substituted Indoles, Indole Alkaloids, UV Spectra, MS Spectra, 1 H NMR spectra 
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 TEI-XML for    default:Reihe_B/38/ZNB-1983-38b-0108.pdf 
 Identifier    ZNB-1983-38b-0108 
 Volume    38 
20Author    Wolf-Walther Du Mont, Mario GrenzRequires cookie*
 Title    Bis(trimethylsiloxy)tin(II): A Heterosiloxane as Soft Ligand  
 Abstract    Contrary to earlier reports the reaction of sodium trimethylsilanolate with stannous chlo-ride does not yield bis(trimethylsiloxy)tin(II) (1) but a polynuclear compound of the type Sn20(0SiMe3)2 (2). 1 is obtained from the reac-tion of stannocene with trimethylsilanole. The compound is a dimer that gives rapid exchange reactions of terminal and bridging trimethylsil-oxy groups in inert organic solvents. 
  Reference    (Z. Naturforsch. 38b, 113—114 [1983]; eingegangen am 10. September 1982) 
  Published    1983 
  Keywords    Oxastannylenes, Heterosiloxanes, NMR Spectra 
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 TEI-XML for    default:Reihe_B/38/ZNB-1983-38b-0113_n.pdf 
 Identifier    ZNB-1983-38b-0113_n 
 Volume    38 
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