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181Author    K. Bluhm, C. H. ParkRequires cookie*
 Title    Die Synthese und Kristallstruktur des Borat-Phosphats: a -Zn3(B0 3)(P04) Synthesis and Crystal Structure of the Borate-Phosphate: Q-Zn3(B 0 3)( P 0 4)  
 Abstract    Single crystals of the compound a -Z n 3(B 0 3)(P 0 4) were obtained at 1050 °C by using B20 3, P20 5 and Z n C 0 3 as starting materials and subsequent cooling to 600°C with 20°C/h. X-ray investigations on single crystals yield a new crystal structure in the monoclinic space group Cm -(Nr. 8) with a = 972.5(2); b = 1272.0(3); c = 487.4(3) pm; 0 = 1 1 9 .8 0 (4)°; Z = 4. The structure contains isolated trigonally planar B 0 3 and tetrahedral P 0 4 units which are not joined together. Zinc occupies three crystallographically different point positions and is trigonal-bipyramidally, tetragonal-pyramidally or distorted tetrahedrally coordinated by oxygen. 
  Reference    (Z. Naturforsch. 52b, 102—106 [1997]; eingegangen am 16. August 1996) 
  Published    1997 
  Keywords    Zinc, Borate, Phosphate, Synthesis, Crystal Structure 
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 TEI-XML for    default:Reihe_B/52/ZNB-1997-52b-0102.pdf 
 Identifier    ZNB-1997-52b-0102 
 Volume    52 
182Author    Z. NaturforschRequires cookie*
 Title      
 Abstract    Single crystals of (Me3Sn)3CCN were obtained by the reaction of tris(trimethylstannyl)amine with boiling acetonitrile in the presence of potas­ sium fluoride and trimethylarsane. The compound has been characterized by IR spectroscopy and by a crystal structure determination. Space group 
  Reference    Z. Naturforsch. 52b, 145—148 (1997); eingegangen am 7. Oktober 1996 
  Published    1997 
  Keywords    Tin Compound, Synthesis, IR Spectra, Crystal Structure 
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 TEI-XML for    default:Reihe_B/52/ZNB-1997-52b-0145_n.pdf 
 Identifier    ZNB-1997-52b-0145_n 
 Volume    52 
183Author    Borate Anion, A. Wiesch, K. BluhmRequires cookie*
 Title    AgSrfByO^]: Das erste wasserfreie quaternäre Silber(I)-Borat mit vierfach koordiniertem Silberion und einem neuartigen Boratanion AgSr[B70 12]: The First Anhydrous Quaternary Silver(I)-Borate with Fourfold Coordinated Silver Ion and a New  
 Abstract    Single crystals of AgSr[B70 , 2] were obtained by using a B20 3 flux-technique and Ag2C 0 3 and SrC 03 as starting materials in a silver ampoule at 800 °C. X-ray investigations on single crystals led to the space group C 2/c with a = 664.2(5); b = 1153.6(3); c = 2198.0(6) pm; ß = 92,52(3)°; Z = 8. Ag+ is fourfold coordinated by oxygen atoms and forms distorted A g04 tetrahedra while Sr2+ has nine nearest neighbours. The compound contains a hitherto unknown two dimensional borate anion [B70 i 2]3-which contains four trigonal planar B 0 3 groups and three B 0 4 tetrahedra per unit. 
  Reference    Z. Naturforsch. 52b, 227—230 (1997); eingegangen am 9. September 1996 
  Published    1997 
  Keywords    Silver, Strontium, Borate, Synthesis, Crystal Structure 
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 TEI-XML for    default:Reihe_B/52/ZNB-1997-52b-0227.pdf 
 Identifier    ZNB-1997-52b-0227 
 Volume    52 
184Author    Matthias Krieger3, Klaus Harms3, Jörg Magullb, Kurt Dehnicke3Requires cookie*
 Title    Phosphanimin-und Phosphaniminato-Komplexe des  
 Abstract    Zinks. Kristallstrukturen von [ZnCl2(Me3SiNP(CH2)4CMe3)]2, [ZnI2(Me3SiNPEt3)]2, [ZnI2{Me2Si(NPEt3)2 }] und [ZnBr(NPMe3)]4 CH2Cl2 Phosphaneimine and Phosphoraneiminato Complexes of Zinc. Crystal Structures of [ZnCl2(M e3SiNP(CH2)4CM e3)]2, [ZnI2(Me3SiNPEt3)]?, [Znl2{Me2Si(NPEt3)2}], and [ZnBr(NPMe3)]4 CH2Cl2 The donor-acceptor complexes [ZnCl2(Me3SiNP(CH2)4CMe3)]2 (l)and [ZnI2(Me3SiNPEt3)]2 (2) have been prepared from the zinc dihalides and the corresponding silylated phosphaneimi-nes in CH2C12. Thermolysis of 2 leads to the formation of [ZnI2(Me2Si(NPEt3)2)] (3). Znl2 and ZnBr2 react with the silylated phosphaneimines Me3SiNPR3 (R = Me, Et) in the presence 
  Reference    Z. Naturforsch. 52b, 243—250 (1997); eingegangen am 1. August 1996 
  Published    1997 
  Keywords    Zinc Compounds, Phosphoraneiminato Complexes, Synthesis, Crystal Structure 
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 TEI-XML for    default:Reihe_B/52/ZNB-1997-52b-0243.pdf 
 Identifier    ZNB-1997-52b-0243 
 Volume    52 
185Author    W. SchnickRequires cookie*
 Title    Synthesen, Kristallstrukturen und Eigenschaften von Trisilber-und Trikalium-tri-/x-imido-cyclotriphosphat, Ag3(P 0 2NH)3 und K3(P 0 2NH)3 Syntheses, Crystal Structures, and Properties of Trisilver and Tripotassium Tri-^-im ido Cyclotriphosphate, Ag3(P 0 2N H)3 and K3(P 0 2N H)3 N. Stock  
 Abstract    Coarse crystalline Ag3(P 0 2NH)3 (1) and K3(P 0 2NH)3 (2) are obtained by addition of an aqueous solution of A gN 03 to an acidified solution of Na3(P 0 2NH)3 • 4H20 and by diffusion controlled addition of ethanol to a solution of K3(P 0 2NH)3 in water, respectively. The crystal structures of 1 and 2 have been determined by single crystal X-ray methods (Ag3(P 0 2NH)3: P2,/c; a = 1166.6(1), b = 786.4(1), c = 997.8(1) pm, ß = 106.91(1)°; Z = 4. K3(P 0 2NH)3: R3; a = 1271.4(2), c = 1017.9(2) pm, Z = 6). In Ag3(P 0 2NH)3 the cyclic anion is markedly distorted because of interactions between Ag+ and one nitrogen atom of the anion. In K3(P 0 2NH)3 the trimetaphosphimate ring shows a chair conformation and two cyclic anions are connected to each other by hydrogen bonds. DTA/TG investigations show thermal decomposition above 275 and 250 °C for 1 and 2, respectively. 
  Reference    Z. Naturforsch. 52b, 251—255 (1997); eingegangen am 14. November 1996 
  Published    1997 
  Keywords    Trimetaphosphimate, Synthesis, Crystal Structure, Thermal Property 
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 TEI-XML for    default:Reihe_B/52/ZNB-1997-52b-0251.pdf 
 Identifier    ZNB-1997-52b-0251 
 Volume    52 
186Author    SvitlanaR. Petrusenkoa, Joachim Sielerb, VladimirN. Kokozay3 'Requires cookie*
 Title    Direct Synthesis of Zinc and Nickel(II) Complexes with l,4-Diazabicyclo[2.2.2]octane  
 Abstract    The peculiarities of the formation of zinc and nickel(II) complexes by interaction of metal powder or metal oxide with ammonium salts (halides, nitrate, thiocyanate) were investigated in non-aqueous solutions (methanol, acetonitrile, N,N-dimethylformamide=DMF, dimethylsulf-oxide=DMSO) in presence of l,4-diazabicyclo[2.2.2]octane. The stoichiometry of the com ­ plexes was found to depend on the initial reagent ratio Ni/ZnOiNfLX and Ni/ZnO:Ten. The compounds of compositions Z n(H Ten)(H 20)(N 03)3 and Ni(HTen)(Ten)Cb were character­ ized by X-ray crystallography. Both complexes contain five-coordinate metal atoms. The zinc compound possesses monomeric molecular structure whilst the nickel complex is polymeric. 
  Reference    Z. Naturforsch. 52b, 331—336 (1997); received July 30 1996 
  Published    1997 
  Keywords    Synthesis, Zinc, Nickel(II), Triethylenediamine, X-Ray 
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 TEI-XML for    default:Reihe_B/52/ZNB-1997-52b-0331.pdf 
 Identifier    ZNB-1997-52b-0331 
 Volume    52 
187Author    Stefan Horstmann, Wolfgang SchnickRequires cookie*
 Title    Synthese, Kristallstruktur und Eigenschaften von 1,1,3,3,3-Pentaamino- l-th io -l A \3 A 5-diphosphaz-2-en (NH2)2P(S)N=P(NH2)3 Synthesis, Crystal Structure, and Properties of 1,1,3,3,3-Pentaam ino-l-thio-l A5,3A5-diphosphaz-2-ene (N H 2)2P(S)N =P(NH 2)3  
 Abstract    (NH2)2P(S)N=P(NH2)3 has been prepared by a two step synthesis. Suitable single crystals were obtained from an acetonitrile solution in a temperature gradient between 60 °C and room temperature. The crystal structure of (NH->)tP(S)N=P(NH->)3 has been determined by single cry­ stal X-ray methods (P2,/c, a = 9 9 8 .2 7 (9)> '= 762.78(8), c = 1007.70(15) pm, ß = 107.340(7)°, Z = 4). In the crystal structure each hydrogen atom is subject to a hydrogen bond. Four N-H -N hydrogen bonding interactions per molecule build up a framework connecting two molecules in eight-membered rings. Each sulfur atom shows six distances N -H -S in the range of weak hydrogen bonding interactions. 
  Reference    Z. Naturforsch. 52b, 490—95 (1997); eingegangen am 18. Dezember 1996 
  Published    1997 
  Keywords    Aminophosphazenes, Synthesis, Crystal Structure, Hydrogen Bonding 
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 TEI-XML for    default:Reihe_B/52/ZNB-1997-52b-0490.pdf 
 Identifier    ZNB-1997-52b-0490 
 Volume    52 
188Author    A. M. Orgenstern, H. OppermannRequires cookie*
 Title    Untersuchungen zur thermischen Zersetzung von Ammoniumlanthanhalogeniden Investigation on the Thermal D ecom p osition o f A m m onium H alides  
 Abstract    The decomposition equilibria of Ammonium Lanthanum Halides (NH4)2LaX5 were determined by total pressure measurements in a membrane zero manometer. The phases (NH4j2LaX5 decompose in one step to give solid LaX3 and gaseous NH3 and HX. From the decomposition functions the enthalpies of formation and the standard entropies of the phases are derived. ^H £(N H 4)2LaCl5,f,298) = -4 1 1 ,7 ± 2,2 kcal/mol; S°((NH4)2LaCl5,f,298) = 86,7 ± 2,3cal/Kmol; ^H^(NH4)2LaBr5,f,298) = -351,6 ± 3,8 kcal/mol; S°((NH4)2LaBr5,f,298) = 101,1 ± 1,8 cal/Kmol; _}H£(NH4)2LaI"f,298) = -2 6 8 ,9 ± 3,9 kcal/mol; S°((NH4)2LaI5,f,298) = 115,5 ± 4,3 cal/Kmol. 
  Reference    Z. Naturforsch. 52b, 696—706 (1997); eingegangen am 17. Februar 1997 
  Published    1997 
  Keywords    Synthesis, Ammonium Lanthanum Halides, Thermal Decomposition, Thermochemical Data 
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 TEI-XML for    default:Reihe_B/52/ZNB-1997-52b-0696.pdf 
 Identifier    ZNB-1997-52b-0696 
 Volume    52 
189Author    Hans Hartl, Michael HoyerRequires cookie*
 Title    Synthese und Strukturuntersuchungen von Iodocupraten(I), X V III. Darstellung und Kristallstruktur von PbCu2I4 * 2C H 3CN [1] Synthesis and Structure Investigations of Iodocuprates(I), X V III. Preparation and Crystal Structure of PbCu2I4 * 2C H 3CN [1]  
 Abstract    Single crystals of PbCu2I4-2(CH3CN) are formed by reaction of Pbl2 with Cul in ace-tonitril. The compound crystallizes in the mono­ clinic space group C2/m; a = 1625.8(3), b = 436.6(1), c = 1025.8(2)pm; ß = 94.77(3)°; V = 725.7 pm3 TO6; Z = 2. The crystal structure is built up by chains of trans-edge sharing ^[PbI6/3] octahe-dra and corner sharing ^[CuI-y^CH^CN)] tetra­ hedra connected by common I-I edges. 
  Reference    Z. Naturforsch. 52b, 766—768 (1997); eingegangen am 14. März 1997 
  Published    1997 
  Keywords    Iodometallates, Lead-Copper-Iodide, Synthesis, Crystal Structure 
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 TEI-XML for    default:Reihe_B/52/ZNB-1997-52b-0766_n.pdf 
 Identifier    ZNB-1997-52b-0766_n 
 Volume    52 
190Author    P. Schm, O. Bosholm, H. O. Pperm, AnnRequires cookie*
 Title    Untersuchungen zum ternären System Bi/Te/O, II. Thermisches Verhalten und Koexistenzbeziehungen von Bi20 2Te  
 Abstract    Investigations o f the Ternary System Bi/Te/O, II. The Therm al Behaviour and the R elations o f Phase C oexistences o f B i20 2Te The phase Bi20 2Te exists in the pseudobinary system Bi203/Bi2Te3. The thermal behaviour of Bi2Ö2Te was determined by DTA and X-ray analysis: The phase exists up to 620 °C and decomposes into the solid phases Bi12TeO20, Bi10Te2O 19 [1] and liquid BiTe. The relations of the phase coexistences in the pseudobinary system and in the ternary area Bi20 3/Te02/Bi2Te3/Te were investigated by solid state reactions, chemical transport reactions, and by total pressure measurements. 
  Reference    Z. Naturforsch. 52b, 1461—1466 (1997); eingegangen am 2. Oktober 1997 
  Published    1997 
  Keywords    Synthesis, Thermal Properties, Phase Diagram, Chemical Transport Reactions 
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 TEI-XML for    default:Reihe_B/52/ZNB-1997-52b-1461.pdf 
 Identifier    ZNB-1997-52b-1461 
 Volume    52 
191Author    Andre Wiesch3, Hauke Timmb, Karsten Bluhm3Requires cookie*
 Title    Uber CuDy2[B80 16] und CuHo2[B80 16]: Zwei neue "Metaborate" mit einem ^ [B80 16]g_-Anion On CuDy2[B80 16] and CuHo2[B80 16]: Two New "Metaborates" with a ^ [B80 16]8-Anion  
 Abstract    Nearly colourless single crystals of the compounds CuDy2 [B80 i 6] (I) and CuHo2[B80)6] (II) have been obtained by a B20 3 flux technique. They crystallize in the structure of CuTb2 [B80)6] (I) or in an orthorhombic variant (II). X-ray investigations on single crystals led to the space group C2h -P2!/c (Nr. 14) with lattice parameters a = 1025,5(10); b = 836,99(10); c = 621,2(8) pm, ß = 90.47(10)°; Z = 2 (I) and D^h -Pbam (Nr. 55) with a = 840,7(2), b = 616,6(2), c = 1022,0(2) pm, Z = 2 (II). The structures contain 1 [B80 16]8_ chains isolated from each other, which include tri-and tetracoordinated boron, T'fie chains consist of alternating twelve and eight-membered rings of boron and oxygen atoms connected by B 0 4 units. Dy,+ and H o 3+ are octacoordinated and Cu2+ is hexacoordinated in elongated octahedra by oxygen. The relation between these two structures is discussed. 
  Reference    (Z. Naturforsch. 53b, 1—4 [1998]; eingegangen am 23. Oktober 1997) 
  Published    1998 
  Keywords    Copper, Lanthanoids, Borate, Synthesis, Crystal Structure 
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 TEI-XML for    default:Reihe_B/53/ZNB-1998-53b-0001.pdf 
 Identifier    ZNB-1998-53b-0001 
 Volume    53 
192Author    Lanthanoid Borates, A. Wiesch, K. BluhmRequires cookie*
 Title    CuHo2[B20 5]2* Ein unerwarteter Strukturtyp in der Reihe der Kupferlanthanoidborate CuHo2[B20 5]2: An Unexpected Structure Type in the Series of Copper  
 Abstract    Single crystals of the new compound CuHo2 [B20 5 ]2 were obtained by using a B20 3 flux technique with CuO and Ho20 3 at 1050 °C. X-ray investigations on single crystals led to the space group P 2,/c (Nr. 14) with lattice parameters a = 454.3(2); b = 726.0(4); c = 936.0(5) pm; ß = 90.77(1)°; Z = 2. The compound is isotypic to CuTb2[B20 5 ] 2 as well as to the gadolinite structure (FeY2 [BeSi05]2). The structure exhibits layer-like 2 [B20 5]4~, a two-dimensional anion consisting of edge sharing B 0 4 -tetrahedra, which form four-and eight-membered rings. The layers are connected by elongated C u06-octahedra and slightly distorted tetragonal LnOs-antiprisms. 
  Reference    (Z. Naturforsch. 53b, 5—8 [1998]; eingegangen am 23. Oktober 1997) 
  Published    1998 
  Keywords    Copper, Holmium, Borate, Synthesis, Crystal Structure 
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 TEI-XML for    default:Reihe_B/53/ZNB-1998-53b-0005.pdf 
 Identifier    ZNB-1998-53b-0005 
 Volume    53 
193Author    Helical Borate, AnionA. Wiesch, K. BluhmRequires cookie*
 Title    Ag2Cs[B1 5 0 2 4]* Ein wasserfreies quaternäres SiIber(I)-Borat mit einem neuartigen Boratanion mit helixartigem Aufbau Ag2C s[B 150 24]: An Anhydrous Quaternary Silver(I)-Borate with a New  
 Abstract    Single crystals o f Ag2C s[B ,50 24] were prepared by using a B 20 3 flux technique with Ag2C 0 3 and Cs2C 0 3 in a closed silver tube at 650 °C. X-Ray investigations led to a new crystal structure in the space group P 2 ,2 ,2 (Nr. 18) with lattice parameters a = 1778.7 (4); b = 2219.2 (4); c = 512.2 (1) pm, Z = 4. The silver atoms are part of distorted A g 0 4 tetrahedra and planar A g 0 3 units while the caesium atoms are eightfold coordinated by oxygen. The compound contains an as yet unknown borate anion [B,50 24] with twelve B 0 3-and three B 0 4 units per formula. The B 0 3 units are connected to eight cords twisted to helices which are combined via B 0 4 tetrahedra to a three dimensional framework with large tunnels occupied by the cations. 
  Reference    Z. Naturforsch. 53b, 157—160 (1998); eingegangen am 23. Oktober 1997 
  Published    1998 
  Keywords    Silver, Caesium, Borate, Synthesis, Crystal Structure 
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 TEI-XML for    default:Reihe_B/53/ZNB-1998-53b-0157.pdf 
 Identifier    ZNB-1998-53b-0157 
 Volume    53 
194Author    Hans-Friedrich Klein, Alexandra Brand, Gerhard CordierRequires cookie*
 Title    Synthesis and Reactions with CO and C2H4 of Cobalt(I) Complexes Containing Trimethylphosphine and Chelating o-Diphenylphosphanyl- phenolate Ligands  
 Abstract    In tetracoordinate cobalt(I) halide compounds CoX(Ph2P ^ O H)(P M e3)2 (X = CI, Br) o-phos-phanylphenols PhaP^O H are coordinated as phosphane ligands. In the presence o f base chelat­ ing anions Ph2P ^ O _ give rise to pentacoordinate com plexes Co(Ph2 P ^ O)(P M e3)3. M olec­ ular structures are presented for both types o f compounds. The five-membered chelate ring in Co(Ph2P ^ O)(P M e3)3 is resistant to protonation, and ring-opening is not observed in the presence o f CO or C2H4. Replacing one o f the trimethylphosphanes by one o f the 7r-acceptor ligands affords fiuxional com plex m olecules which upon cooling attain definite ground-state geometries out o f a multitude o f possible isomers. 
  Reference    Z. Naturforsch. 53b, 307 (1998); received November 28 1997 
  Published    1998 
  Keywords    Cobalt, o-Phosphanylphenolate Complexes, Synthesis, Structure, Fluxionality 
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 Identifier    ZNB-1998-53b-0307 
 Volume    53 
195Author    LacknerRequires cookie*
 Title    Octacidomycine, IV : Neue Totalsynthese von rac-Octacidomycin und strukturverwandten Oligocarbonsäuren Octacidom ycins, I V : A New Total Synthesis of rac-O ctacidom ycin and Structurally R elated O ligocarboxylic A cids A ndreas K rause, H elm ut  
 Abstract    a new strategy, an improved total synthesis of the unique antibiotic octacidomy-cin (1) and of structurally related oligocarboxylic acids was developed (Scheme 1,2). Starting from 3 and the tetraethylester of l,17-dibromo-6,6,12,12-heptadecane-tetracarboxylic acid (6) as a key compound, systematical fragment condensations lead to the nonatriacontane-pentadecacarboxylic acid 11 and hence to the 1,3,9,15,21,27,33,39-nonatriacontane-octacarbo-xylic acid 1. The synthetic pathway can easily be modified and generally be applied for the synthesis of a broad variety of hitherto unknown oligocarboxylic acids or their esters, respec­ tively, and even of cyclic analogues (Scheme 2). 
  Reference    Z. Naturforsch. 53b, 1043—1050 (1998); eingegangen am 22. Juni 1998 
  Published    1998 
  Keywords    Antibiotics, Octacidomycins, Oligocarboxylic Acids, Synthesis, NMR Data Following 
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 TEI-XML for    default:Reihe_B/53/ZNB-1998-53b-1043.pdf 
 Identifier    ZNB-1998-53b-1043 
 Volume    53 
196Author    Axel Lifferth3, IsabelB. Ahnera, Ut Helm, Lackner, M. Artina SchäferbRequires cookie*
 Title    Synthese und Struktur von Prolinring-modifizierten Actinomycinen des X-Typs Synthesis and Structure of Proline Ring Modified Actinomycins of the X-Type  
 Abstract    The first total synthesis o f actinomycins containing L-4-hydroxyproline (1) and the separa­ tion and NM R spectroscopic assignment o f the regioisomers X (V* and iso-X0/i (lc, le) are described. The synthetic X 0/j proves, that the oxidized proline ring of the natural actinomycins 
  Reference    Z. Naturforsch. 54b, 681—6 (1999); eingegangen am 15. Januar 1999 
  Published    1999 
  Keywords    Antibiotics, Actinomycins, Synthesis, Crystal Structure, NM R Data 
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 TEI-XML for    default:Reihe_B/54/ZNB-1999-54b-0681.pdf 
 Identifier    ZNB-1999-54b-0681 
 Volume    54 
197Author    Michael Becker, Martin Jansen, Martin Jansen Heisenbergstraße, D-70596, Stuttgart Sonderdruckanforderungen, Prof Dr, Martin JansenRequires cookie*
 Title    Darstellung und Charakterisierung von Rubidiumhydrogencyanamid Synthesis and Characterization of Rubidium Hydrogen Cyanamide  
 Abstract    The synthesis of RbHCN2 was carried out by reaction of cyanamide with rubidium amide in liquid ammonia. The crystal structure has been determinedo by x-ray powder methods (orthor-hombic, P2,2,2,, a = 7.299(1), b = 9.435(1), c = 9.420(1) Ä; Z = 8). The anion is slightly bent (174°) and exhibits two different bond lengths (C-N: 1.17, HN-C: 1.31 A). 
  Reference    Z. Naturforsch. 54b, 1375—1378 (1999); eingegangen am 26. Juli 1999 
  Published    1999 
  Keywords    Rubidium Hydrogen Cyanamide, Synthesis, Crystal Structure, IR Data 
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 TEI-XML for    default:Reihe_B/54/ZNB-1999-54b-1375.pdf 
 Identifier    ZNB-1999-54b-1375 
 Volume    54 
198Author    E. N. Kirillova, A. A. Trifonova, S. E. Nefedovb, I. L. Eremenkob, F. T. Edelmannc, M. N. Bochkarev3, J.G A RazuvaevRequires cookie*
 Title      
 Abstract    The interaction of NdCh with lithium metal in THF in the presence of naphthalene produces a mixture of naphthalene complexes of di-and trivalent neodymium chloride of an aggregate com­ 
  Reference    Z. Naturforsch. 54b, 1379—1384 (1999); received March 3 1999 
  Published    1999 
  Keywords    Neodymium, Divalent Oxidation State, Synthesis, Structure, Phenoxide 
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 Identifier    ZNB-1999-54b-1379 
 Volume    54 
199Author    C. Bender, D. W. Ulff-M, H. Older, F. Vogt, M. M. Ritschl, EiselRequires cookie*
 Title    Synthese und Kristallstruktur des Bromdifluormethyl-triphenyl- phosphoniumbromids, [(C6H5)3 PCF2Br]+ Br" Synthesis and Crystal Structure o f B rom odifluorom ethyl-triphenylphosphonium Brom ide, [(C6H5)3PC F2Br]+ Br~  
 Abstract    Difluorobromomethyl-triphenylphosphonium bromide [(C6H5)3PCF2Br]+ Br-(1) has been prepared by the reaction of triphenylphosphine with dibromodifluoro-methane in acetonitrile or methylene chloride. The colorless crystals are monoclinic, space group P 2,/n, Z=4, a = 1067.1(2), b = 1488,5(2), c = 1178,2(2) pm, ß = 95,67(3)°. The lattice contains Br~ anions and [(C6H5)3PCF2Br]+ cations with a Br-Br distance of 322,33(11) pm.. For the title compound the results of AM 1, PM 3 ,and MNDO calculations are in good agreement with corresponding values determined by the X-ray analysis only in the case of PM 3. The yellow-red [(C6H5)3PCF2Br]+ Br3~ (2) has been obtained by treating 1 with equimolar quantities of elemental bromine in methylene chloride solution. E inleitung 
  Reference    Z. Naturforsch. 55b, 167—170 (2000); eingegangen am 28. Oktober 1999 
  Published    2000 
  Keywords    Bromodifluoromethyl-triphenylphosphonium Bromide, Synthesis, Crystal Structure 
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 TEI-XML for    default:Reihe_B/55/ZNB-2000-55b-0167.pdf 
 Identifier    ZNB-2000-55b-0167 
 Volume    55 
200Author    Ernst Bayer, Heribert Hellstern, Heiner EcksteinRequires cookie*
 Title    Synthese von immobilisierten Peptidfragmenten an Polystyrol-Polyoxyethylen zur Affinitätschromatographie Synthesis of Immobilized Peptide Fragments on Polystyrene-Polyoxyethylene for Affinity Chromatography  
 Abstract    Polystyrene-polyoxyethylene craft copolymers have been used for step-wise peptide synthesis. After completion of synthesis the protecting groups are cleaved under acidic conditions, where the polymer-peptide bond is stable. These gels in comparison to polystyrene peptide gels, show better properties for applications in affinity chromatography as well as synthesis on solid supports, because the advantageous properties of polystyrene beads are combined with the excellent spacer behavior of polyoxyethylene chains (mobility, solvation by water and organic solvents). Peptide gels with polylysine sequences have been synthesized as highly selective stationary phases for the separation of the homologous oligo desoxyribonucleotides (d7)n with n = 1—3. The principal possibilities of these gels for affinity chromatography 
  Reference    Z. Naturforsch. 42c, 455—460 (1987); received December 1 1986 
  Published    1987 
  Keywords    birthday Affinity Chromatography, Immobilization, Liquid-Solid-Phase, Peptides, Synthesis 
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 TEI-XML for    default:Reihe_C/42/ZNC-1987-42c-0455.pdf 
 Identifier    ZNC-1987-42c-0455 
 Volume    42 
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