Go toArchive
Browse byFacets
Bookbag ( 0 )
'Crystal Structure' in keywords Facet   Publication Year 1993  [X]
Facet   section ZfN Section B  [X]
Results  40 Items
Sorted by   
Publication Year
1993[X]
1Author    Gudrun Stieglitz, Bernhard Neumüller, K. Urt DehnickeRequires cookie*
 Title    Synthesen und Kristallstrukturen der Lithiumphosphide { Li(DME)[P(f-Bu)2]} 2 und [Li(DM E)PPh2l00 Syntheses and Crystal Structures of the Lithium Phosphides {Li(DME)[P(/-Bu)2]}2 and [Li(DM E)PPh2]0 0  
 Abstract    The title com pounds have been prepared by the reaction o f rc-butyllithium with the corre­ sponding diorganophosphanes H PR 2 (R = r-Bu, Ph) in D M E solutions. Both compounds were characterized by crystal structure determinations. {Li(DM E)[P(f-Bu)2]}2: Space group P 1, Z = 1, 2027 observed unique reflections, R = 0.055. Lattice dimensions at —80 °C: a = 879.9(3), b = 986.3(1), c = 1064.0(2) pm, a = 70.69(1)°, ß = 70.63(2)°, y -69.89(2)°. The com pound forms centrosymmetric dimers o f symmetry Q with L i-P bond lengths o f 260.0 and 257.3 pm for the Li2P2 four-membered ring. [Li(DM E)PPh2]0C : Space group P 2 ,/«, Z = 4. 3437 observed unique reflections, R = 0.055. Lattice dimensions at -8 0 °C: a = 1034.8(2), b = 812.48(9), c = 1978.4(3) pm, ß = 103.30(2)°. The com pound forms polymeric chains via LiP bridges with L i-P bond lengths o f 256.3 and 254.1 pm. 
  Reference    Z. Naturforsch. 48b, 156 (1993); eingegangen am 8. Oktober 1992 
  Published    1993 
  Keywords    Lithium Phosphides, Synthesis, Crystal Structure 
  Similar Items    Find
 DEBUG INFO      
 TEI-XML for    default:Reihe_B/48/ZNB-1993-48b-0156.pdf 
 Identifier    ZNB-1993-48b-0156 
 Volume    48 
2Author    Jorge Blanco, Eduardo Gayoso, JoseManuel Vila, Miguel Gayoso, CäciliaM. Aichle, -. M. Össmer, Joachim SträhleRequires cookie*
 Title    Synthesis and Structure of Di-I/i-acetato(0,0')-ferrocenylmethyliden- 2,4,6-trimethylaniline(N,C)-palladium(II)l  
 Abstract    Di-[//-acetato(0,0')-ferrocenylmethylidene-2,4,6-trimethylaniline(N,C)-palladium(II)], 
  Reference    Z. Naturforsch. 48b, 906—910 (1993); received M arch 8 1993 
  Published    1993 
  Keywords    Cyclometallation, Synthesis, Crystal Structure 
  Similar Items    Find
 DEBUG INFO      
 TEI-XML for    default:Reihe_B/48/ZNB-1993-48b-0906.pdf 
 Identifier    ZNB-1993-48b-0906 
 Volume    48 
3Author    Sabine Kühnei, Klaus-Jürgen RangeRequires cookie*
 Title    Darstellung und Kristallstruktur von Rubidiumdicyanoargentat(I), Rb|Ag(CN)2] * 0,4 H 20 Synthesis and Crystal Structure o f Rubidium Dicyanoargentate(I), Rb[Ag(CN)2] * 0,4 H 20  
 Abstract    Rb[A g(C N)2] 0 ,4 H 20 was synthesized by reaction o f silver cyanide with RbOH and liquid 
  Reference    Z. Naturforsch. 48b, 133—139 (1993); eingegangen am 3. September 1992 
  Published    1993 
  Keywords    Rubidium Dicyanoargentate(I), Synthesis, Crystal Structure 
  Similar Items    Find
 DEBUG INFO      
 TEI-XML for    default:Reihe_B/48/ZNB-1993-48b-0133.pdf 
 Identifier    ZNB-1993-48b-0133 
 Volume    48 
4Author    Peter Rögner, Ulrike Schießl, Klaus-Jürgen RangeRequires cookie*
 Title    On the Space Group of Cesium Perbromate, CsBrÖ4  
 Abstract    The correct space group of cesium perbromate, C sB r04, is 14,/amd and not 14,/a as previously reported. The com pound is isostructural with a-C sR e 0 4, the high-temperature modification of cesium perrhenate. By analogy with C sR e04 and C s I0 4, a phase transform ation to a low-tempera-ture modification is predicted for C sB r04. 
  Reference    Z. Naturforsch. 48b, 235—236 (1993); received September 18 1992 
  Published    1993 
  Keywords    Cesium Perbromate, Space G roup, Crystal Structure 
  Similar Items    Find
 DEBUG INFO      
 TEI-XML for    default:Reihe_B/48/ZNB-1993-48b-0235_n.pdf 
 Identifier    ZNB-1993-48b-0235_n 
 Volume    48 
5Author    Klaus-Jürgen Range, Alexandra AtzesdorferRequires cookie*
 Title    Ein Orthoperrhenat mit flächenverknüpften R e 0 6-0ktaedern: Hochdrucksynthese und Kristallstruktur von K3NaRe20 9 An Orthoperrhenate with Face-Sharing R e 0 6 Octahedra: High-Pressure Synthesis and Crystal Structure of K 3N aR e20 9  
 Abstract    The title com pound was prepared by high-pres­ sure reaction of rhenium metal with technical grade (i.e., N a containing) K O , in a modified Belt-type apparatus (20 kbar, 1Ö00 °C, 60 min, Au capsule). The amber-coloured crystals are very hygroscopic and decompose rapidly when exposed to air. K 3N aR e20 9 crystallizes hexago-nally, space group P 63/mmc, with a = 6.012(1), c = 14.342(14)Ä, c/a = 2.386 and Z = 2. The structure was refined to R = 0.031, R w = 0.023 for 422 independent, absorption-corrected reflections with l> a (I). K 3N aR e20 9 is isostructural with 6 H -B a T i0 3, a perowskite variant, and contains Na and Re in octaedral coordination. Two R e 0 6 octahedra are face-sharing, thus creating a Re20 9 double octahedron with a R e -R e distance of 2.92Ä. 
  Reference    Z. Naturforsch. 48b, 237—239 (1993); eingegangen am 30. September 1992 
  Published    1993 
  Keywords    Tripotassium Sodium D iorthoperrhenate, High-Pressure Synthesis, Crystal Structure 
  Similar Items    Find
 DEBUG INFO      
 TEI-XML for    default:Reihe_B/48/ZNB-1993-48b-0237_n.pdf 
 Identifier    ZNB-1993-48b-0237_n 
 Volume    48 
6Author    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 
  Similar Items    Find
 DEBUG INFO      
 TEI-XML for    default:Reihe_B/48/ZNB-1993-48b-0418.pdf 
 Identifier    ZNB-1993-48b-0418 
 Volume    48 
7Author    W. Olfgang HönleRequires cookie*
 Title    Single-Crystal Structure Refinement of LiZnAs  
  Reference    Z. Naturforsch. 48b, 683—6 (1993); received January 18 1993 
  Published    1993 
  Keywords    Crystal Structure, Filled-up Zinc Blende, Ternary Arsenide 
  Similar Items    Find
 DEBUG INFO      
 TEI-XML for    default:Reihe_B/48/ZNB-1993-48b-0683_n.pdf 
 Identifier    ZNB-1993-48b-0683_n 
 Volume    48 
8Author    Alexander Lichtblau, Hans-Dieter Hausen, Wolfgang KaimRequires cookie*
 Title    First Structural Characterization of an Easily Oxidized Derivative o f 1,4-Dihydroquinoxaline  
 Abstract    The first crystal structure analysis o f a 1,4-dihydroquinoxaline is described by example o f the l,4-bis(re/-/-butyldimethylsilyl) derivative. In the solid state, this molecule exhibits a non-planar heterocycle with a dihedral angle o f 156.3° along the N -N axis in the boat-shaped 87r electron ring system. The alkyl groups o f the Si(/er/-Bu)M e2 substituents are arranged as to minimize steric repulsion. Despite the reduced n electron conjugation due to non-planarity, the com pound is oxidized reversibly to an EPR detectable radical cation at -0 .5 9 V vs. ferro­ cene in dichloromethane. However, the second oxidation to the fully aromatic dication is elec-trochemically irreversible. A comparison with previously obtained results illustrates the struc­ tural flexibility o f the non-aromatic 1,4-dihydro-1,4-diazine ring system which is strongly affected by rather weak non-bonded interactions. 
  Reference    Z. Naturforsch. 48b, 713 (1993); eingegangen am 21. Dezember 1992 
  Published    1993 
  Keywords    Heterocycles, Organosilicon Compounds, Crystal Structure, Cyclic Voltammetry, Conformation 
  Similar Items    Find
 DEBUG INFO      
 TEI-XML for    default:Reihe_B/48/ZNB-1993-48b-0713.pdf 
 Identifier    ZNB-1993-48b-0713 
 Volume    48 
9Author    Adalbert Lossin, Gerd MeyerRequires cookie*
 Title    CsPr2(CH3COO)7, ein caesiumarmes wasserfreies ternäres Caesium-Praseodym-Acetat CsPr2(C H 3COO)7, a Cesium Poor Anhydrous Ternary Cesium Praseodymium (III) Acetate  
 Abstract    Single crystals of CsPr2(CH 3CO O)7 were obtained from an acetic acid solution of Pr(CH 3COO)3-H-,0 and C s ^ O j in a m olar ratio of 4:1 at 120 °C. It crystallizes in the triclinic system', PT (no. 2), Z = 2, a = 1028.1(5), b = 1034.6(5), c = 1199.4(6) pm, a = 84.82(2), ß = 67.07(3), y = 76.01(2)°, Vm = 343.3(3) cm3/mol, R = 0.031, R w = 0.027. The crystal structure contains infinite chains, i[P r2(CH 3COO)6], running along the [1 1 0] direction. The chains are built up by bridging acetate ions coordinated to two crystallographically different P r3+ ions which are both surrounded by 9 oxygen ligands. These chains are linked by "intercalated" Cs(CH3COO) to layers parallel (100). C s+ has contacts to oxygen atoms of neighbouring layers, such that a three-dimensional network is formed. 
  Reference    Z. Naturforsch. 48b, 886—892 (1993); eingegangen am 8. M ärz 1993 
  Published    1993 
  Keywords    Cesium Praseodym Acetate, Synthesis, Crystal Structure 
  Similar Items    Find
 DEBUG INFO      
 TEI-XML for    default:Reihe_B/48/ZNB-1993-48b-0886.pdf 
 Identifier    ZNB-1993-48b-0886 
 Volume    48 
10Author    Blaschette Arm, Karl-Heinz Nagel, PeterG. JonesRequires cookie*
 Title    Polysulfonylamine, XLIV [1] Synthese von |Na(15-Krone-5)][N(S02CH3)2l und Kristallstruktur bei -9 5 °C Polysulfonylamines, XLIV [1] Synthesis of [Na(15-Crown-5)][N(S02C H 3)2] and Crystal Structure at -9 5 °C  
 Abstract    The complex [Na(15-crown-5)][N(S02C H 3)2] crystallizes at -2 5 °C from a methanol solu­ tion containing equimolar am ounts of N aN (S 0 2C H 3)2 and 15-crown-5. Its crystallographic data at -9 5 °C are: monoclinic, space group P2,/c, a = 852.1(5), b = 2731.9(12), c = 909.2(4) pm, ß = 115.53(4)°, V = 1.910 nm3, Z = 4, D v = 1.445 M gm 3. The structure in the solid state consists of ion pairs. The sodium cation is coordinated to the five oxygen atoms of the crown ether, one oxygen atom o f the anion, and to the nitrogen atom of the anion. The bond distances are N a-O (crow n) 238.7-247.2, Na sodium ion lies 78 pm out of the plane o f the crown the coronand is described. 
  Reference    Z. Naturforsch. 48b, 893—897 (1993); eingegangen am 5. Februar 1993 
  Published    1993 
  Keywords    Polysulfonylamines, (15-Crown-5)sodium Dimesylamide, Synthesis, Crystal Structure 
  Similar Items    Find
 DEBUG INFO      
 TEI-XML for    default:Reihe_B/48/ZNB-1993-48b-0893.pdf 
 Identifier    ZNB-1993-48b-0893 
 Volume    48 
11Author    Jürgen Stuhrm, Arnold Adam, Hans-Uwe SchusterRequires cookie*
 Title    Na8TiAs4, eine neue Zintl-Phase mit idealen isolierten TiAs4-Tetraedern N a8TiAs4, a New Zintl-Com pound with Ideal Isolated TiAs4-Tetrahedra  
 Abstract    The new cubic com pound N a8TiAs4, a = 1376.7(1) pm, space group F d3m , is isostructural to N agSnSb4 [1]. The structure is characterized by ideal isolated TiAs4 tetrahedra. The com­ pound is in agreement with the Zintl concept. 
  Reference    Z. Naturforsch. 48b, 898—900 (1993); eingegangen am 4. M ärz 1993 
  Published    1993 
  Keywords    Crystal Structure, Preparation, Zintl-Com pound 
  Similar Items    Find
 DEBUG INFO      
 TEI-XML for    default:Reihe_B/48/ZNB-1993-48b-0898.pdf 
 Identifier    ZNB-1993-48b-0898 
 Volume    48 
12Author    Shan-Jia Chen, Ulrich Behrens, Rüdiger MewsRequires cookie*
 Title    Oxothiatriazine (NSCl)"(NS(0)Cl)3_n (n = 1,2)  
 Abstract    A modified m ethod for the preparation of (C1SN)2(C1S(0)N) (1) and (C1SN)(C1S(0)N)2 (2) as well as the crystal structures of 1 and 2 are reported. 
  Reference    Z. Naturforsch. 48b, 901—905 (1993); eingegangen am 4. M ärz 1993 
  Published    1993 
  Keywords    Oxothiatriazines, Crystal Structure, Bond Properties, Stabilities 
  Similar Items    Find
 DEBUG INFO      
 TEI-XML for    default:Reihe_B/48/ZNB-1993-48b-0901.pdf 
 Identifier    ZNB-1993-48b-0901 
 Volume    48 
13Author    MichaelW. Iebcke, ClemensC., F. Reyhardt3, Jürgen Felsche3, G. Ünter EngelhardtbRequires cookie*
 Title    Clathrates with Three-Dimensional Host Structures of Hydrogen-Bonded Pentaborate |B50 6(0 H )4]~ Ions: Pentaborates with the Cations NMe4+, NEt4+, NPhMe3+ and pipH+ (pipH+ = Piperidinium) [1]  
 Abstract    X-ray structure analyses of crystalline [NMe4][B50 6(0 H)4] «H 20 with n ~ 0.25-0.50 (1), [NEt4][B50 6(0 H)4] (2), [NPhM e3][B50 6(0 H)4] (3), and [pipH][B50 6(0 H)4] (4) reveal that these materials are novel clathrates with closely related three-dimensional host structures built up of hydrogen-bonded oligomeric pentaborate [B50 6(0 H)4]~ ions. The organic cations and water molecules (in 1) occupy as guest species large straight channel-like voids of nearly rectangular cross-section. Com pound 1 crystallizes monoclinically with space group P2,/c (Z = 4); the com pounds 2, 3 and 4, which possess the same host-structure topology, crystallize triclinically with space group P i (Z = 2). "B-M AS N M R spectra allow the detection of small angular distortions in the pentaborate anions caused by the specific hydrogen bonding in the host frameworks. U pon heating the com pounds on a therm obalance in a dynamic inert gas atm os­ phere dehydration occurs at temperatures of 563 K (1), 543 K (2), 558 K (3) and 523 K (4) before degradation of the organic cations starts at tem peratures o f 633 K (1), 623 K (2), 623 K (3) and 613 K (4). 
  Reference    Z. Naturforsch. 48b, 978—985 (1993); received February 17 1993 
  Published    1993 
  Keywords    Pentaborate, Tetraalkylammonium, Piperidinium, Clathrate, Crystal Structure 
  Similar Items    Find
 DEBUG INFO      
 TEI-XML for    default:Reihe_B/48/ZNB-1993-48b-0978.pdf 
 Identifier    ZNB-1993-48b-0978 
 Volume    48 
14Author    WilliamS. Sheldrick, Thomas HäuslerRequires cookie*
 Title    Synthesis and Structure of the Hexaethylcyclohexaarsoxane Complexes [{M(CO)3}2{cjc/o-(C2H5AsO)6}], M = Cr, Mo, W  
 Abstract    The hexaethylcyclohexaarsoxane complexes [{M (CO)3}2{c>'c/o-(C2H 5A sO)6}], M = Cr, M o, W, 2 -4 have been prepared by the reaction o f (C2H 5AsO)n with the respective metal hexacar-bonyl in toluene and characterized by their IR and N M R spectroscopic data. For 2 the m olec­ ular structure was established by X-ray structural analysis. The 12 atom s o f the A s60 6 ring form a flattened cuboctahedron in which the 6 oxygen atoms lie in the central equatorial plane. Cr(CO)3 groups are coordinated facially by the upper and lower three arsenic atoms. An ap­ proximately S6 symmetry is displayed by the Cr2A s60 6 core. Average values o f respectively 116.3 and 98.9° are observed for the A s -O -A s and O -A s -O angles in the hexadentate li­ gand. The E l-M S and 'H N M R data for (C2H 5AsO)" suggest that this alkylcycloarsoxane is present in solution as a mixture o f species including trimers and tetramers so that a metal as­ sisted ring expansion is required for the formation o f 2 -4 . 
  Reference    Z. Naturforsch. 48b, 1069—1074 (1993); received April 5 1993 
  Published    1993 
  Keywords    Ethylcycloarsoxane, Tricarbonyl Metal Complexes, Crystal Structure 
  Similar Items    Find
 DEBUG INFO      
 TEI-XML for    default:Reihe_B/48/ZNB-1993-48b-1069.pdf 
 Identifier    ZNB-1993-48b-1069 
 Volume    48 
15Author    Michael Plate, Peter Hofacker, WernerM. Assa, Birgit Schwarz, Bernhard Neumüller, Kurt DehnickeRequires cookie*
 Title    Synthese und Kristallstrukturen der Wolfram(VI)-Alkinkomplexe |WCl4(P h -C = C -I)(T H F )l und [WCl4( P h -C = C -T e -C 4H9)(THF)| Synthesis and Crystal Structures o f the Tungsten(VI) Alkyne Complexes [WCl4(P h -C = C -I)(T H F )] and [WCl4( P h -C = C -T e -C 4H 9)(THF)]  
 Abstract    [WCl4(P h -C = C -I)(T H F)] has been prepared by the reaction o f mrns-[WCl4(SEt2)2] with P h -C = C -I in TH F solution, whereas [WCl4(P h -C = C -T e -n C 4H 9)(THF)] has been syn­ thesized by the reaction o f P h -C = C -T e -« C 4H 9 with tungsten hexacloride in the presence o f C2C14 and THF. Both complexes were characterized by IR spectroscopy and by crystal struc­ ture determinations. [WCl4(P h -C = C -I)(T H F)]: Space group P 2,/c, Z = 4, 2617 observed unique reflections, R = 0.064. Lattice dimensions at -7 0 °C: a = 1518.2(3), b = 714.5(1), c = 1540.0(3) pm, ß = 90.09(3)°. [WCl4(P h -C = C -T e -« C 4H9)(TH F)]. Space group P 1, Z = 2, 3911 observed unique reflec­ tions, R = 0.067. Lattice dimensions at 20 °C: a = 844.0(3), b = 974.6(4), c = 1002.4(3) pm, a = 76.00(4),/? = 105.14(1), y = 82.03(3)°. Both complexes have molecular structures, in which the tungsten atom s are seven-coordi­ nate by four chlorine ligands, by the two alkyne carbon atom s, and in trans position to the latter by the oxygen atom o f the T H F molecule. The WC bond lengths are 198 and 200(1) in the telluro complex and 206 and 196(1) pm in the iodine derivative. 
  Reference    Z. Naturforsch. 48b, 1105—1111 (1993); eingegangen am 21. April 1993 
  Published    1993 
  Keywords    Tungsten Alkyne Complexes, Synthesis, IR Spectra, Crystal Structure 
  Similar Items    Find
 DEBUG INFO      
 TEI-XML for    default:Reihe_B/48/ZNB-1993-48b-1105.pdf 
 Identifier    ZNB-1993-48b-1105 
 Volume    48 
16Author    Minkwitz, Hans Preut, M. Athias, Seifert, Dirk LamekRequires cookie*
 Title    Die Darstellung von Trifluormethylnitrylhexafluorometallaten CF2N (0 )H +MF6~, Trifluormethylhydroxylammoniumhexafluorometallaten CF3N H 2O H +MF6  
 Abstract    (M = As, Sb) und Kristallstruktur von CF3NH 2O H +AsF6" Preparation of Trifluoromethylnitryl-Hexafluorometallates C F 3N (0)H + M F 6~, Trifluorom ethylhydroxylamm onium -Hexafluorom etallates C F 3N H 2O H +M F 6_ (M = As, Sb) and Crystal Structure of C F 3N H 2O H +A sF6~ R olf The preparation o f C F 3N (0)H + M F6~ and C F 3N H ,O H +M F 6' (M = As, Sb) and the crystal structure o f C F 3N H 2O H +A sF 6_ are reported. C F 3N (Ö)H +M F 6~ is prepared by protonation o f C F 3N O in the superacid system H F /M F 5 (M = As, Sb). With an excess o f C F 3N O the cation C F 3N H 2O H +M F6" is formed. C F3NH-,OH+A sF 6~ crystallizes in the triclinic space group P 1 with a = 5.071(2), b = 8.297(3), c = 8.882(4)Ä, a = 90.93(4)°, ß = 95.49(4)°, y = 102.96(4)° and Z = 2. It is formed by a redox reaction between C F 3N (0) H + and excess C F 3N O. 
  Reference    Z. Naturforsch. 48b, 1241—1247 (1993); eingegangen am 23. April 1993 
  Published    1993 
  Keywords    Nitryl Salts, Trifluoromethylhydroxylammonium Salts, Preparation, Spectra, Crystal Structure 
  Similar Items    Find
 DEBUG INFO      
 TEI-XML for    default:Reihe_B/48/ZNB-1993-48b-1241.pdf 
 Identifier    ZNB-1993-48b-1241 
 Volume    48 
17Author    Herrn Prof, DrRequires cookie*
 Title    Zur Struktur des Pentaazadienidions [tol-N =N -N -N =N -tol]  
 Abstract    _. Synthese und Kristallstruktur von Cs2(18-Krone-6)(tolN5tol)2 und (NH4)[Cr(NH3)6(H20) 4](tolN5tol)4 T h e S tru c tu re o f th e P e n ta a z a d ie n id e A n io n [ to l-N = N -N -N = N -to l] _. S yn th esis a n d C ry sta l S tru c tu re o f C s2(1 8 -C ro w n -6)(to lN 5to l)2 an d (N H 4)[C r(N H 3)6(H 20) 4] (to lN 5to l)4 S u san n e D ie te ric h , Jo a c h im S träh le* A concentrated solution of CsCl, 18-crown-6, and to l-N = N -N (H)-N = N -to l in aqueous am m onia affords Cs2(18-crown-6)(tolN5tol)2, which crystallizes in the triclinic space group P 1 with a = 852.6(2), b = 1139.4(3), c -1373.9(4) pm, a = 104.17(3),ß = 95.94(2), y = 110.74(2)°, Z = 1. In the structure centrosym m etrical [Cs2(18-crown-6)]2+ moieties are packed with pairs of l,5-bis(tolyl)pentaazadienide anions to built up columns along [100]. The N -N distances N 1 -N 2 = 128 pm and N 4 -N 5 = 129 pm in the pentaazadienide anions indicate localized double bonds, while the distances N 2 -N 3 and N 3 -N 4 of 134 pm can be assigned to single bonds. A m ixture of C r(N H 3)^+ and tolN N N (H)N N tol in concentrated aqueous am monia yields triclinic (N H 4)[C r(N H 3)6(H 20) 4](tolN 5tol)4 crystallizing in the space group P 1 with the lattice param eters a = 1561.1(1), b = 1619.3(3), c = 1703.3(2) pm, a = 107.03(1), ß = 116.81(1), y = 101.75(1)°, Z = 2. The structure contains tolN5toh anions, NH^ cations and [C r(N H 3)6(H 2Ö)4]3+ complexes in which four triangular faces of the Cr(N H 3)6 octahedron are capped by w ater molecules which are linked via hydrogen bonds. Within the pentaazadienide anions which are connected with the [Cr(N H 3)6(H 20) 4]3+ complexes also via hydrogen bonds an indication for localized double bonds N 1=N2 and N 4=N 5 has been obtained. 
  Reference    Z. Naturforsch. 48b, 1574—1580 (1993); eingegangen am 26. Juli 1993 
  Published    1993 
  Keywords    Pentaazadienide A nion, Synthesis, Crystal Structure 
  Similar Items    Find
 DEBUG INFO      
 TEI-XML for    default:Reihe_B/48/ZNB-1993-48b-1574.pdf 
 Identifier    ZNB-1993-48b-1574 
 Volume    48 
18Author    H.R G Bender, M. Nieger, E. NieckeRequires cookie*
 Title    Synthese amino-und silylsubstituierter Triphosphane -Struktur des 1.1.3.3-Tetrakis(di-is0-propylamino)-2-trimethylsilyl-und des 1.1.3.3-T etraphenyl-2-tri-fStf-propylsilyl-triphosphans Synthesis of Amino-and Silyl-Substituted Triphosphines -Structure of 1.1.3.3-Tetrakis(dwso-propylamino)-2-trimethylsilyl-and 1.1.3 .3 -Tetraphenyl-2 -tri-/s0 -propylsilyl-triphosphine  
 Abstract    A variety o f triphosphines [(Et2N)2 P]2PR 4 a -h , [('Pr2 N)2P]2PR 5 a -e and [Ph,P]-,PR 9 e -g [R = Cy (a), rBu (b), Mes (c), M e3Si (d), 'BuM e2Si (e), ThexM e2Si (f), 'Pr3Si (g), Äd"(h), H (i)] has been obtained by the reaction o f the dilithiated primary phosphines R PH 2 l a -h with 2 equiv. o f the chlorophosphines (Et2 N)2PCl 2, ('Pr2N)2PCl 3 or Ph2PCl 8 . M ethanolysis o f the trimethylsilyl substituted derivative [('Pr2 N)2 P]2P(SiM e3) 5d yields the hydrogen substituted triphosphine [('Pr2 N)2 P]2PH 5i. The lithiated diphosphine ('Pr2 N)2 P -P (S iM e 3)Li 6 reacts with the chlorophosphine 2 to give the unsymmetrically substituted triphosphine ('Pr2N)2 P -P (S iM e 3)-P (N E t2) 2 7d. The com pounds have been chracterized by their N M R and mass spectra. The structures o f 4d and 9g have been determined by X-ray diffraction, repre­ senting the first structures o f uncomplexed triphosphines. 
  Reference    Z. Naturforsch. 48b, 1742—1752 (1993); eingegangen am 7. Juni 1993 
  Published    1993 
  Keywords    Triphosphines, Aminotriphosphines, Silyltriphosphines, N M R Spectra, Crystal Structure 
  Similar Items    Find
 DEBUG INFO      
 TEI-XML for    default:Reihe_B/48/ZNB-1993-48b-1742.pdf 
 Identifier    ZNB-1993-48b-1742 
 Volume    48 
19Author    Sabine Niemann, Wolfgang JeitschkoRequires cookie*
 Title    The Crystal Structures of Re2Al, Re4Alu, and ReAl6  
 Abstract    of the rhenium aluminides Re4Aln and ReAl6 were obtained by reaction of rhenium with an excess of aluminum. Re4Aln was found to be isotypic with Mn4Alu. The MnAl6 type structure of ReAl6 was confirmed. The crystal structures of both compounds were refined from single-crystal X-ray data. Re4Aln :P l, Z = 1, a = 516.0(1) pm, b = 896.3(2) pm, c = 516.9(1) pm, a = 90.44(1)°, ß = 99.76(1)°, y = 105.17(1)°, V = 0.2271 nm3, R = 0.036 for 2315 structure factors and 74 variable parameters. ReAl6: Cmcm, Z = 4, a -761.0(1) pm, b = 660.5(1) pm, c = 903.4(1) pm, V = 0.4541 nm3, R = 0.013 for 711 F values and 23 variables. In both structures the rhenium atoms have ten aluminum neighbors at distances from 245 to 277 pm. The A l-A l distances cover the whole range from 251 to 362 pm rather continuously. The previously reported compound Re2Al with the tetragonal MoSi2-type struc­ ture has the lattice constants a = 298.1(1) pm, c = 958.4(4) pm, V = 0.08519 nm3. ReAl6 shows Pauli-paramagnetism. 
  Reference    Z. Naturforsch. 48b, 1767—1773 (1993); received June 161993 
  Published    1993 
  Keywords    Crystal Structure, Magnetic Susceptibility, Rhenium, Aluminum Well-crystallized samples 
  Similar Items    Find
 DEBUG INFO      
 TEI-XML for    default:Reihe_B/48/ZNB-1993-48b-1767.pdf 
 Identifier    ZNB-1993-48b-1767 
 Volume    48 
20Author    K. Arl Hensen, PeterW. Ag, N. Er+Requires cookie*
 Title    Die Kristallstruktur der Verbindung N-Trimethylsilyl-3,4-Dimethylpyridiniumbromid The C rystal Structure o f N -T rim ethylsilyl-3,4-dim ethylpyridinium Brom ide  
 Abstract    Trimethylbromosilane and 3,4-lutidine form a 1:1 com pound which is stable at room tem­ perature. Single crystals of this com pound can be isolated by sublimation. It crystallizes in the orthorhom bic space group P 2,2,2, with lattice constants a = 737,08(9) pm, b = 1295,7(1) pm, c = 1318,8(3) pm. The crystal structure was refined to Rw = 0,042 and proves an ionic struc­ ture. 
  Reference    (Z. Naturforsch. 48b, 79—81 [1993]; eingegangen am 21. Februar 1992) 
  Published    1993 
  Keywords    Trimethylbromosilane, 3, 4-Dimethylpyridine, Addition Com pound, Crystal Structure 
  Similar Items    Find
 DEBUG INFO      
 TEI-XML for    default:Reihe_B/48/ZNB-1993-48b-0079.pdf 
 Identifier    ZNB-1993-48b-0079 
 Volume    48 
1
2
Next