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1994[X]
101Author    Werner Uhl, E. Schütz, Siegfried Pohl, Wolfgang SaakRequires cookie*
 Title    Das Anion [R2A l-A lR 2Br] (R = CH(SiMe3)2) mit Aluminium-Aluminium- und terminaler Aluminium-Brom-Bindung The A nion [R2A l-A lR 2Br]~ (R = CH(SiM e3)2) with an A lum inium -A lum inium and a Terminal A lum inium -Brom ine Bond  
 Abstract    Dialane(4), A lum inium -A lum inium Bond, Terminal A l-B r Bond 
  Reference    Z. Naturforsch. 49b, 637—641 (1994); eingegangen am 9. Dezem ber 1993 
  Published    1994 
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 Identifier    ZNB-1994-49b-0637 
 Volume    49 
102Author    Peter Lange, A. Nnette Schier, Jürgen Riede, Hubert SchmidbaurRequires cookie*
 Title    Gold(I) Complexes of Organic Nitrogen Compounds: Synthesis and Structures of (Phthalimido)(triphenylphosphine)gold(I) in Crystals C6H4(CO)2 N(AuPPh3) and C6H4(CO)2N( AuPPh3) * CHCI3  
 Abstract    Gold(I) Complexes, G old(I) Nitrogen Bond, Diacylamido Complexes, Phthalimide [0(A uP Ph3)3]+BF4_ has been found to be a powerful aurating reagent for phthalimide, to give (phthalim ido)(triphenylphosphine)gold(I) (1) in high yield. Two different crystal sys­ tems, with or without CHC13 molecules in the unit cell, have been obtained. In both cases the m onoaurated diacylamido complex C6H 4(C O)2N(AuPPh3) (1) is present as a monomer with linear two-coordinate gold atoms. The N -A u (I) bond lengths (2.028(4), 2.040(4) A) are similar to those found in other m onoaurated complexes of the type R 'R 2N(AuPPh3) with strongly electron-withdrawing organic substituents R 1, R 2. Crystal data: 1, monoclinic, P 2 t/c, a = 9.948(1), b = 15.712(1), c = 14.651(1) Ä, ß = 103.40(1)°, V = 2227.7 Ä 3, Z = 4; 1C H C 13, orthorhombic, P 2 12 ,2 1, a = 8.889(1), b = 10.349(1), c = 29.198(2) A, V = 2686.0 A 3, Z = 4. 
  Reference    Z. Naturforsch. 49b, 642—646 (1994); received January 21 1994 
  Published    1994 
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 Identifier    ZNB-1994-49b-0642 
 Volume    49 
103Author    Martin Paul, Hubert SchmidbaurRequires cookie*
 Title    A New Synthesis of Dimethylgold(III) Chloride Using Tetramethyltin  
 Abstract    Dimethylgold(III) Chloride, Tetramethyldichlorodigold(III), Methylation of AuCl3, Tetramethyltin The reaction of HAuCl4 or AuCl3 with Sn(CH3)4 in methanol at low tem peratures gives [(CH3)2AuCl]2 in yields from 40 to 45%. 
  Reference    Z. Naturforsch. 49b, 647—649 (1994); received February 11 1994 
  Published    1994 
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 Identifier    ZNB-1994-49b-0647 
 Volume    49 
104Author    Caroline Röhr, Rüdiger KniepRequires cookie*
 Title    Die Kristallstrukturen von Li[PF6] und Li|AsF6]: Zur Kristallchemie von Verbindungen A[EVF6] The Crystal Structures o f Li[PF6] and Li[AsF6]: On the Crystal Chemistry o f Com pounds A[EVF6]  
 Abstract    Hexafluoro-Element(V) Com pounds, Crystal Structure Li[PF6] (rhom bohedral, R3; a = 493.2(2), c = 1265.8(4) pm; Z = 3) and Li[AsF6] (rhom-bohedral, R3; a = 501.6(1), c = 1302.8(4) pm; Z = 3) are isotypes of the Li[BiF6] structure. The Ev-elements P(As) as well as lithium are in a nearly perfect octahedral coordination by fluorine. The crystal structures of the fluoro-com pounds A[EVF,] (A = Li, Na, K, Rb, Cs; Ev = P, As, Sb, Bi) can be divided in two groups: i. with A and Ev in a N aCl like arrangement and ii. with A and Ev in a CsCl like arrangement. The coordination numbers (CN) of the A-sites (CN between 6 and 12) depend on the ratio of radii r(EV5+)/r(A +). 
  Reference    Z. Naturforsch. 49b, 650—654 (1994); eingegangen am 29. November 1993 
  Published    1994 
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 Identifier    ZNB-1994-49b-0650 
 Volume    49 
105Author    W. S. Sheldrick, B. SchaafRequires cookie*
 Title    Darstellung und Kristallstruktur der Cäsium-Selenidogermanate(IV) Cs4Ge4Se10*2CH3OH und Cs4Ge2Se8 Preparation and Crystal Structure of the Cesium Selenidogerm anates(IV) Cs4G e4S eio-2 CH3 0 H and Cs4G e2Se8  
 Abstract    Cesium Selenidogermanates(IV), M ethanolothermal Synthesis, Crystal Structure M ethanolotherm al reaction of Cs2C 0 3 with Ge and Se at 190 °C yields Cs4G e4Se10-2C H 3OH and Cs4G e2Se8, the structures of which have been determ ined by X-ray structural analysis. The anion [Ge4Se1()]4~ in Cs4G e4Se10-2C H 3OH displays an ada-mantane-like structure in which four GeSe4 tetrahedra are linked via joint vertices. In con­ trast Cs4G e2Se8 contains the novel dinuclear anion [Ge2SeK ]4", the first example of a seleni-dogerm anate(IV) exhibiting Se2 bridging units. Two through S e-S e bonds to yield a six-membered ring, crystallographic C2h symmetry. 
  Reference    Z. Naturforsch. 49b, 655—659 (1994); eingegangen am 20. Dezem ber 1993 
  Published    1994 
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 Identifier    ZNB-1994-49b-0655 
 Volume    49 
106Author    Dieter Sellm, Helge Friedrich, Falk KnochRequires cookie*
 Title    Synthese und Struktur von *1,33N2H4 Transition Metal Com plexes with Sulfur Ligands, Cl*. Synthesis and Structure of N 2H 5[Fe(N 2H4)(S2C6H4)2] * 1,33 N 2H 4  
 Abstract    A ttem pts to coordinate N2H4 to [Fe(S2C6H 4)2] fragments lead to N2H 5[Fe(N2H 4)(S2C6H4)2], which crystallizes from M eOH/N2H 4 solutions as the solvate [(N2H 5){Fe(N2H4)(S2C6H4)2} T.33 N2H 4], 1, and has been characterized by X-ray structure analysis. 1 contains three discrete N2H 5+ cations, four N2H4 solvate molecules and three independent [Fe(N2H4)(S2C6H4)2] anions which are connected via an extended network of N -H —N and N -H —S bridges. N2H 5[Fe(N2H 4)(S2C6H4)2] and 1 contain high-spin Fe(III) centers and labile N2H4 ligands. Ubergangsmetallkomplexe mit Schwefelliganden, CI*. 
  Reference    Z. Naturforsch. 49b, 660—664 (1994); eingegangen am 22. Dezember 1993 
  Published    1994 
  Keywords    Iron Sulfur Hydrazine Complexes, Synthesis, X-Ray 
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 TEI-XML for    default:Reihe_B/49/ZNB-1994-49b-0660.pdf 
 Identifier    ZNB-1994-49b-0660 
 Volume    49 
107Author    P. Souza3, A.I M Atesanz3, A. Arquerob, V. Fernandez3Requires cookie*
 Title    Synthesis and Characterization of Cu(II) and Mono-and Dinuclear Pb(II) Complexes Derived from 3,5-Diacetyl-l,2,4-triazole  
 Abstract    Triazole Hydrazones, Copper(II), Lead(II), Macro Ligand Template 1:1 condensation of 3,5-diacetyl-l,2,4-triazole with thiocarbohydrazide or car-bohydrazide in the presence of 1 equivalent of Pb(SCN)2 produces mononuclear [2+1] com­ plexes 1 and 3. The analogous reaction with thiosemicarbazide and semicarbazide produces the dinuclear [1+2] complex 2 and the mononuclear metal free 4. The carbohydrazide deriva­ tive 3 reacts with the carbohydrazide or the 1,3-diaminopropane to yield the macrocyclic dinuclear complexes 5 and 6. Direct reaction of 3,5-diacetyl-l,2,4-triazole with thiocarbohydrazide, carbohydrazide, thiosemicarbazide and semicarbazide leads to open [1+1] ligands L 1, L2, L3, L4, and closed [1+1] ligands (mesocyclic ligands) L5 and L6 were prepared by addition of 1 equivalent of LiOH to the reaction mixture. The reaction of open and mesocyclic [1+1] ligands with copper(II) salts gives [CuLX2] and [Cu2+L2_] complexes. All these compounds have been characterized by 'H NMR, IR, electronic and mass spectra and by analytical data. 
  Reference    Z. Naturforsch. 49b, 665—671 (1994); received January 19 1994 
  Published    1994 
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 Identifier    ZNB-1994-49b-0665 
 Volume    49 
108Author    Jürgen Voss, Rüdiger RöskeRequires cookie*
 Title    Unexpected Formation of 1-Amino-4,4,5,5-tetramethyl-3- (5,5,6,6-tetramethyl-l,4,5,6-tetrahydropyridazin-3-yl)pyrrolidin-2-one  
  Reference    Z. Naturforsch. 49b, 672 (1994) 
  Published    1994 
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 TEI-XML for    default:Reihe_B/49/ZNB-1994-49b-0672.pdf 
 Identifier    ZNB-1994-49b-0672 
 Volume    49 
109Author    Michael Levis, Ulrich Lüning, Michael Müller, Michael Schmittel, ClemensW. ÖhrleRequires cookie*
 Title    Tris(l,10-phenanthroIine)iron(II) Complexes. Influence of 4,7-Donor Substitution on the Redox Potential [1]  
  Reference    Z. Naturforsch. 49b, 675 (1994) 
  Published    1994 
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 Identifier    ZNB-1994-49b-0675 
 Volume    49 
110Author    Ulrich Siemeling, Beate Neumann, Hans-Georg StammlerRequires cookie*
 Title    A Pentamethylcyclopentadienyl Ligand Functionalized with a Pendant Pyridyl Group; Crystal Structure of its Ferrocene-Type Iron Complex  
  Reference    Z. Naturforsch. 49b, 683 (1994) 
  Published    1994 
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 Identifier    ZNB-1994-49b-0683 
 Volume    49 
111Author    M. Sekar, S. Vanitha, K. J. Rajendra, PrasadRequires cookie*
 Title    Synthesis of Novel 3-Acetyl-2-hydroxy-l-N,N-diacetylaminocarbazole Derivatives  
 Abstract    The synthesis of hitherto unknown 3-acetyl-2-hydroxy-l-N,N-diacetylaminocarbazole (3a-f), is reported. The hydroxyiminocarbazoles (2a-f), prepared from 1-oxo-1,2,3,4-tetra-hydrocarbazoles (la -f) on treatment with acetyl chloride in acetic anhydride yielded the title compounds (3a-f). 
  Reference    Z. Naturforsch. 49b, 687—690 (1994); received June 7/August 31 1993 
  Published    1994 
  Keywords    l-Hydroxyimino-l, 2, 3, 4-tetrahydrocarbazoles, 3-Acetyl-2-hydroxy-l-N, N-diacetylaminocar-bazoles, Aromatization, Thermal Fries Rearrangement, Antimicrobial Activities 
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 TEI-XML for    default:Reihe_B/49/ZNB-1994-49b-0687.pdf 
 Identifier    ZNB-1994-49b-0687 
 Volume    49 
112Author    JörgJ. SchneiderRequires cookie*
 Title    Neue Synthesen für homonukleare Cobalthydrid-Clusterverbindungen New Synthetic Routes to Hom onuclear Cobalt Hydride Clusters  
 Abstract    Cobalt Hydride Cluster Several homonuclear cobalt hydride clusters are accessible by reacting the complexes (?/5-CpR)Co(/72-ethene)2 (R = H5, Me5) 3, 4 with (C2H5)2A1H followed by alcoholysis of the crude reaction mixtures. Depending on the degree of alkyl substitution, different nuclearities of the resulting clusters have been observed. In the case of the pentamethyl substituted derivative (?/5-Cp*)Co(^2-ethene) 4 a mixture of di-, tri-and tetranuclear cobalt hydride clusters namely [(?/5-Cp*)Co]2H3 1, [(?75-Cp*)Co]3H4 2 and [(/75-Cp*)Co]4H4 7 were form­ ed and separated by repeated crystallization. When reacting the parent compound (/75-Cp)Co(?/2-ethene) 3 with (C2H5)2A1H and quenching the reaction mixture with alcohol at low temperature, the tetranuclear cobalt cluster [(/y5-Cp)Co]4H4 5 is the main product. Aside from this, trace amounts of the cobalt alkylidine cluster [(//5-Cp)Co]4i «-[C(CH3)]H 6 were formed as detected by mass spectrometry. For the first time a direct synthesis of [(//5-Cp**)Co]3H4 10 and [(?75-Cp**)Co]4H4 11 was achieved by reaction of cobalt atoms with tetramethyl-ethyl-l,3-cyclopentadiene (mixture of isomers) in methylcyclohexane at -120 °C. However, the main product of this metal atom reaction is the mononuclear cobalt sandwich compound (?75-Cp**)Co(?74-tetramethyl-ethyl-l,3-cyclopentadiene) 9 as a mixture of isomers. The trinuclear cobalt alkylidine cluster [(^5-Cp*)Co]3l w3-[C(CH3)]2 8 is formed when reacting (/75-CpR)Co(/;2-ethene)2 3 with equimolar amounts of di-isobutyl-aluminium-hydride or the borabicyclus 9-BBN. 
  Reference    Z. Naturforsch. 49b, 691—696 (1994); eingegangen am 3. Dezember 1993 
  Published    1994 
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 Identifier    ZNB-1994-49b-0691 
 Volume    49 
113Author    M. Arino Cavazza11, Francesco PietrabRequires cookie*
 Title    Covalent Adducts from 2-Substituted 5-Arylazotropones and Nucleophiles and their Fate  
 Abstract    b Istitu to di C him ica, U niv ersitä degli Studi di T ren to , 1-38050 P ovo-T rento, Italy 
  Reference    Z. Naturforsch. 49b, 697 (1994) 
  Published    1994 
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 Identifier    ZNB-1994-49b-0697 
 Volume    49 
114Author    Jochen Tschakert, Wolfgang VoelterRequires cookie*
 Title    Festphasensynthese von Muramyldipeptidderivaten und Untersuchung ihrer biologischen Aktivität Solid Phase Synthesis o f M uramyl Dipeptide Derivatives and Investigations on their Biological Activities  
 Abstract    A bteilung für Physikalische Biochem ie des Physiologisch-chem ischen In stitu ts d e r U n iv ersität T übingen, H oppe-S eyler-S traße 4, D-72076 T übingen 
  Reference    Z. Naturforsch. 49b, 702 (1994) 
  Published    1994 
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 Identifier    ZNB-1994-49b-0702 
 Volume    49 
115Author    İzzetA. Mour, Saim ÖzkarRequires cookie*
 Title    Synthesis and Spectroscopic Study of Pentacarbonyl(i72-tetracyanoethylene) Metal(O) Complexes of the Group 6B Elements  
  Reference    Z. Naturforsch. 49b, 717 (1994) 
  Published    1994 
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 Identifier    ZNB-1994-49b-0717_n 
 Volume    49 
116Author    Requires cookie*
 Title    Verbindungen an der Zintl-Grenze: Darstellung und Kristallstruktur von Na17Ga29ln 12 und K17In41  
  Reference    Z. Naturforsch. 49b, 721 (1994) 
  Published    1994 
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 Identifier    ZNB-1994-49b-0721 
 Volume    49 
117Author    Requires cookie*
 Title    Uber die Darstellung von (CH3)2SSSH+SbF6-und (CH3)2SSSCH3+SbCl6-[1]  
 Abstract    On the Preparation of (C H 3)2SSSH+SbF6-and (C H 3)2SSSCH3+SbCl6-[1] Rolf Minkwitz*, Andreas Kornath U niversität D ortm und, Fachbereich Chem ie, A n o rganische C hem ie, Postfach 500500, D-44221 D ortm und Z. N aturforsch. 49b, 7 2 9 -7 3 2 (1994); eingegangen am 1. D ezem b er 1993 Thiosulfonium Salts, N M R Spectra, R am an Spectra The p rep aratio n of the thiosulfonium salts (C H 3)2SS S H +SbF6" and (C H 3)2SSSC H 3+SbCl6~ from (C H 3)2SSCl+SbF6 and (C H 3)2SS H +SbC l6~, resp., at 195 K is reported. (C H 3)2SSSFI+SbF6~ is tran sfo rm ed into (C H 3)2SSSCl+SbF6" by reaction with C l2 at low te m ­ peratures. The salts have been ch aracterized by th eir R am an spectra. 
  Reference    Z. Naturforsch. 49b, 729 (1994) 
  Published    1994 
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 Identifier    ZNB-1994-49b-0729 
 Volume    49 
118Author    Klaus StöweRequires cookie*
 Title    Zur Struktur und Dotierung von Selenosilikaten: die Kristallstruktur von Er2S e S i0 4 und Er3 75Ca0 25Se2 75C10 25Si20 7 Structure and Doping of Seleno Silicates: the Crystal Structures of Er2SeSi04 and E r3 7^CaQ 2$Se2 ^C Iq ^Si^O-y  
 Abstract    Well-shaped brown and pink isometric crystals were obtained as by-products o f the syn­ thesis o f erbium selenides from the elements in evacuated and sealed silica ampoules with graphite inlets. They could be identified as erbium seleno m ono-and disilicates by energy dis­ persive X-ray fluorescence and X-ray structure determination. The monosilicate Er2S e S i0 4 crystallizes isotypically to N d 2S e S i0 4 in the space group Pbcm with the lattice parameters a = 600.2(2), b = 688.0(2), c = 1075.2(2) pm and represents the second known seleno inosilicate o f the rare earths. From X-ray structure analysis an isotypic relation between the disilicate Er3 75Ca0 25Se2 75C10 25Si20 7 and the com pound Sm4S3Si2O v was found, the former crystallizing in the space group 14,/am d with the lattice parameters a -1177.7(2) and c = 1376.5(2) pm. The doping o f the sorosilicate with the elements Ca and Cl originated from contam inations in the graphit inlets used in the procedure. 
  Reference    Z. Naturforsch. 49b, 733—7 (1994); eingegangen am 13. Januar 1994 
  Published    1994 
  Keywords    Erbium Seleno Silicates, Crystal Structures, Doping Effects 
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 Identifier    ZNB-1994-49b-0733 
 Volume    49 
119Author    Siegfried Pohl, Michael Peters, Detlev Haase, Wolfgang SaakRequires cookie*
 Title    Bildung von Iodoantimonaten und -bismutaten. Kristallstrukturen von (PhCH2NEt3)4 [Sb6l 2 2 L (PhCH2NEt3)4 [Bi6l 2 2 ] und (Ph4P)3[Bi5I18] Form ation of Iodoantim onates and Bismutates. Crystal Structures of (PhCH 2N E t3)4[Sb6I22], (PhC H 2N Et3)4[Bi6l22] and (Ph4P)3[Bi5I 18]  
 Abstract    The formation and the crystal structures of the title compounds are reported. (PhCH2N E t3)4[Sb6l 22] and (PhCH 2N E t3)4[Bi6l 22] are isotypic and contain a novel [E6I22]4~ anion (E = Sb, Bi). The anion of (Ph4P)3[Bi5I18] consists of a linear chain of five face-sharing [B il6] octahedra. 
  Reference    Z. Naturforsch. 49b, 741—7 (1994); eingegangen am 27. Januar 1994 
  Published    1994 
  Keywords    Iodoantimonates, Iodobismutates, Crystal Structure 
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 Identifier    ZNB-1994-49b-0741 
 Volume    49 
120Author    M. Arkus Brylak, Wolfgang JeitschkoRequires cookie*
 Title    U3TiSb5, U3VSb5, U3CrSb5, and U3MnSb5 with "Anti"-Hf5Sn3Cu Type Structure  
 Abstract    The title compounds have been prepared from the elem ental com ponents by arc-melting and subsequent annealing. Single crystals of U 3TiSb5 and U 3M nSb5 were obtained from a tin flux and their structures were determined from single-crystal X-ray data: P 63/mcm, Z = 2; a = 913.9(2), c = 611.2(1) pm, R = 0.011 (233 structure factors, 14 variables) for U 3TiSb5 and a = 916.8(2), c = 613.2(1) pm, R = 0.015 (427 structure factors, 14 variables) for U 3MnSb5. The lattice constants of the isotypic compounds are: a -908.2(2), c = 608.3(2) pm for U 3VSb5 and a -911.0(1), c = 611.5(1) pm for U^CrSb^. The structure of these antimonides may be regarded as an "anti"-type structure of Hf5Sn3Cu with the antimony atoms on the hafnium sites, while the positions of the uranium and transition metal atoms correspond to the posi­ tions of the tin and copper atoms. A comparison o f the interatomic distances of UVTiSbs with those of U 3Sb4, USb2, and a-antimony suggests oxidation numbers according to (U +III)3Ti+,v(S b l_III)3(S b 2_,I)2, where the Sb2 atoms form weakly bonded chains. 
  Reference    Z. Naturforsch. 49b, 747—752 (1994); received D ecem ber 16 1993 
  Published    1994 
  Keywords    Lattice Constants, Antimonides, X-Ray 
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 Identifier    ZNB-1994-49b-0747 
 Volume    49 
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