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2000 (185)
61Author    Crystal Structure, Spectroscopic Data, F. Silver, C. Yanam Ide, M. Ichael Becker, Jürgen Nuss, M. Artin Jansen, Sonderdruckanforderungen An, ProfM. Dr, JansenRequires cookie*
 Title    Kristallstruktur und schwingungsspektroskopische Daten von Silbercyanamid  
 Abstract    Silver Cyanamide Ag2CN2 precipitates on mixing aqueous solutions of H2CN2 and silver nitrate as a yellow crystalline solid. The title compound was characterised by single crystal X-ray diffraction and IR-spectroscopy (monoclinic, P2j/c (No. 14), a = 7.315(1), b = 6.010(1), c = 6.684(1) Ä; ß = 102.29(1)°; Z = 4). The anion is slightly bent (177.1 (5)°) and exhibits two significantly different bond lengths (C-N(l): 1.194(6), C-N(2): 1.266(5) A). 
  Reference    Z. Naturforsch. 55b, 383—385 (2000); eingegangen am 27. Januar 2000 
  Published    2000 
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 Identifier    ZNB-2000-55b-0383 
 Volume    55 
62Author    H. Orst Kunkely, A., VoglerRequires cookie*
 Title    Luminescence Detection and Photodimerization of 1,3-Dimethyluracil Coordinated to Copper(I)  
 Abstract    Photochemistry, Copper(I), Uracil, Luminescence 1,3-Dimethyluracil (DMU) forms a complex with copper(I) iodide which shows a green luminescence at Amax = 505 nm. With PF6~ counter ions a photoactive Cu(I)DMU complex is generated which shows a long-wavelength absorption at Amax = 335 nm. Light absorption by this band leads to a dimerization of DMU to its cyclobutane dimer. 
  Reference    Z. Naturforsch. 55b, 386—388 (2000); received February 10 2000 
  Published    2000 
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 Identifier    ZNB-2000-55b-0386 
 Volume    55 
63Author    Nils Wiberg, Wolfgang Niedermayer, Heinrich Nöth+, Jörg Knizek+, Werner Ponikwar+, Kurt Polbom+, SupersilylsilanesR., Six3, R., =. Supersilyl, =. Si, /. Bu3, =. H.Requires cookie*
 Title    Supersilylsilane R*SiX3 i Darstellung, Charakterisierung und Strukturen; sterische und van-der-Waals Effekte der Substituenten X [1] Supersilylsilanes R*SiX3: Syntheses, Characterization and Structures; Steric and van-der-Waals Effects of Substituents X [1] Silicon, Supersilylsilanes, Van-der-Waals Effects  
 Abstract    are prepared (i) by reactions of supersilylhalosilanes with supersilyl sodium NaR* (Hal/R* exchange), (ii) by reactions of supersilylhalosilanes with hydride H" (Hal/H exchange), (iii) by reactions of supersilylsilanes with halogens Hal2 (H/Hal exchange, R*/Hal exchange), (iv) by reactions of supersilylhalosilanes with nucleophiles like F" , MeO-(Hal/F or Hal/OMe exchange) and (v) by reactions of supersilylsilanes with strong acids (H /0 S 0 2CF3 exchange). NMR chemical shifts <5(29Si) of the SiX3 groups of R*SiX3 strongly depends on the nature of X. The supersilylsilanes R*SiX3 are in part moisture sensitive (especially compounds with SiX3=SiHHal2 and SiH2Hal), in part sensitive against oxygen (compounds with SiX=SiBr or Sil), and some of them react with supersilyl sodium by supersilanidation (for example R*SiF3, R*SiH2Cl, R*SiMeHCl) or by reduction (for example R*SiCl3, R*SiMeBr2, R*SiPhBrCl). X-ray structure analyses of disilanes fBu3Si-SiX3 with SiX3=Si/Bu3, SiPh3, Sil3, SiPhCl2 show a staggered conformation. Due to steric repulsion of the /Bu3Si and SiX3 groups as well as van-der-Waalsoattraction of the substituents /Bu and X in /Bu3Si-SiX3 the SiSi bonds are longer than 2.34 A (the normal SiSi single bond length) and the torsion angles are smaller/larger than 60° (the ideal staggered conformation). From the extent of SiSi bond elongation and CSiSiX angle compression it is concluded that the bulkiness of X increases in direction Cl < I < Ph < SiMe3 < CMe3 (rBu3Si-Si?Bu3 has to date the longest SiSi bond of all disilanes) and the van-der-Waals forces between fBu/X increase in direction rBu/I < fBu/rBu < /Bu/Ph. 
  Reference    Z. Naturforsch. 55b, 389 (2000); eingegangen am 24. Januar 2000 
  Published    2000 
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 Identifier    ZNB-2000-55b-0389 
 Volume    55 
64Author    Requires cookie*
 Title    Supersilylsilane R*SiX3: Umwandlung in Disilane R*X2Si-SiX 2R*, Silylene R*XSi, Cyclosilane (R*XSi)", Disilene R*XSi=SiXR*, Tetrasupersilyl-tefraÄedrtf-tetrasilan [1 ]  
  Reference    Z. Naturforsch. 55b, 406 (2000) 
  Published    2000 
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 Identifier    ZNB-2000-55b-0406 
 Volume    55 
65Author    Requires cookie*
 Title    Chemistry of Seven-Membered Heterocycles, VI. Synthesis of Novel Bicyclic Heterocyclic Compounds as Potential Anticancer and Anti-HIV Agents  
 Abstract    A bo u E lfatooh G. H am m am 3, N agla A. A bd E l-hafeza, W anda H. M idurab, and M arian M ikołajczykb a N ational R esearch C enter, D ep artm en t o f O rganic Chem istry, D o k k i, G iza, Egypt b C entre o f M olecular and M acrom olecular Studies, Polish A ca d em y o f Sciences, 9 0 -3 6 3 L odz, S ienk iew icza 112, Poland Reprint requests to Prof. M. M ikolajczyk. Fax: + 4 8 (0)4 2 6 8 4 -7 1 -2 6 . E-mail: m arm ikol@ bilbo.cbm m .lodz.pl Z. Naturforsch. 55b, 4 1 7 -4 2 4 (2000); received N o v em b er 2, 1999 B enzothiep in o-pyrid in es, B icyclic Sulfones, H eterocyclization s Several new pyridines, pyridones and pyrans fused to b en zo th iep in e or b e n zo h ep ten e ring 
  Reference    Z. Naturforsch. 55b, 417 (2000) 
  Published    2000 
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 Identifier    ZNB-2000-55b-0417 
 Volume    55 
66Author    Requires cookie*
 Title    Crystal Structure and Properties of the Titanium Stannide Ti2Sn3  
 Abstract    B ern d K ünnen", W olfgang Jeitschko", G unter Kotzyba", and B. D. M osel6 a A n organ isch -C h em isch es Institut, U n iversität M ünster, W ilhelm -K lem m -Straße 8, D -48149 M ünster, G erm any h Institut für P hysikalische C hem ie, U n iversität M ünster, Schlossplatz 7, D -48149 M ünster, G erm any R eprint req uests to W. Jeitschko. Fax: +49 (0)251-83-33136 Z. N aturforsch. 55b, 4 2 5 -4 3 0 (2000); received N ovem b er 12, 1999 Interm etallic C om pounds, Electrical C onductivity, 119Sn M össbauer S p ectroscop y The recen tly reported binary stannide Ti2Sn3 is confirm ed. Its structure was determ ined from single-crystal X-ray diffractom eter data: Cmca, a = 596.7(4), b = 1995(2), c = 701.3(4) pm , Z = 8, R = 0.027 for 817 structure factors and 30 variable param eters. The crystal struc­ ture is com pared to that o f V 2G aSn2, w hich has the sam e space group sym m etry and atom ic positions. T he G a atom s o f V 2G aSn2 occu py those Sn position s o f Ti2Sn3 w hich have the sm aller coord in ation num ber. The tw o different titanium atom s o f Ti2Sn3 have 11 neighbors o f w hich 3 and 4, respectively, are titanium atoms. T he three different tin atom s have 5 titanium w ith 8 or 10 additional tin neighbors. T hey sh ow only a slightly b roadened but un resolved 119Sn M össb auer signal with an isom er shift reflecting the high tin con ten t o f this interm etallic com poun d and a relatively large quadrupole splitting o f 2.10 m m s " 1. Ti2Sn3 is a g o o d m etallic condu ctor and a Pauli param agnet. 
  Reference    Z. Naturforsch. 55b, 425 (2000) 
  Published    2000 
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 Identifier    ZNB-2000-55b-0425 
 Volume    55 
67Author    M. AjidRequires cookie*
 Title    Regeneration of Carbonyl Compounds from Oximes under Microwave Irradiation in Solventless System  
 Abstract    erav ia,D ariush A jam ib, R ahim H ek m atshoar3, Yahya Sh. B eheshtiha3, K arim A ssad o llah 3, and M itra G hassem zadehb 
  Reference    Z. Naturforsch. 55b, 431 (2000) 
  Published    2000 
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 Identifier    ZNB-2000-55b-0431 
 Volume    55 
68Author    Z. NaturforschRequires cookie*
 Title    Umsetzung von N-Alkylpyridinium-Salzen mit Hydroxylamin  
 Abstract    Amide, Amidine, Isoxazole 1-Methylpyridinium salts showed no reaction with excessive hydroxylamine, but nicotinic acid derivatives in HM PT gave the corresponding N-oxides. 3-Acetyl-1-methylpyridinium iodide generated the hydroximino-pyridine 1-oxide 13 and the isoxazoles 14, 15E, and 15Z. 2-and 4-Cyano-l-methylpyridinium iodides underwent no ring cleavage, but altered only the functional group. However, the 3-cyano compound was converted into the corresponding pyridine N-oxides with carboxamide, hydroxyamidine and carbaldoxime groups. 
  Reference    Z. Naturforsch. 55b, 434—442 (2000); eingegangen am 8. März 2000 
  Published    2000 
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 Identifier    ZNB-2000-55b-0434 
 Volume    55 
69Author    Requires cookie*
 Title    Enaminouraciles as Precursors for Synthesis of Pyrimido[4,5-a]pyrimidine- 2,4-diones  
  Reference    Z. Naturforsch. 55b, 443 (2000) 
  Published    2000 
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 Identifier    ZNB-2000-55b-0443 
 Volume    55 
70Author    Ann, FrankW. Eller, K. Urt, D. EhnickeRequires cookie*
 Title    [Co4(v3-NPEt3)2(HNPEt3)2(0 2C-CH3)  
 Abstract    2-(v-0SiMe20SiMe20)2] -ein vierkerniger Cobalt(II)-Komplex mit Leiterstruktur [Co4(v3-N P E t3)2(H N P E t3)2(0 2C -C H 3)2-(v -0 S iM e 20 S iM e 20) 2] -a T etran u clear C o b alt(II) C om plex with L ad d er Structure H a rtm u t A ckerm The title compound has been prepared from co-balt(II) acetate and Me3SiNPEt3 in boiling to­ luene in the presence of silicon grease and traces of w ater as blue single crystals which were charac­ terized by IR spectroscopy and by a crystal struc­ ture determination. Space group Pbca, Z = 8, lat­ tice dimensions at -5 0 °C: a = 1449.3(1), b = 1724.9(1), c = 2356.6(2) pm, R = 0.0548. [Co4(v3-N PEt3)2(H N PE t3)2(0 2C-CH3)2-(v-0SiM e20S iM e20) 2] has a centrosymmetric structure. The four cobalt atoms which are coordi­ nated tetrahedrally are v3-bridged via the N atoms of the two (N PEt3~) groups and v2-bridged by the O atoms of the chelating (OSiMe2OSi-Me20 2') units. The core atoms are arranged in three four-membered rings which are connected in a stair-like way. 
  Reference    Z. Naturforsch. 55b, 448—451 (2000); eingegangen am 11. Februar 2000 Cobalt Phosphoraneim inato Complex 
  Published    2000 
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 Identifier    ZNB-2000-55b-0448_n 
 Volume    55 
71Author    ProfG. Dr, MlostonRequires cookie*
 Title    Metallkomplexe  
 Abstract    mit funktionalisierten Schwefelliganden, XV [1]. Reaktionen von Platin(0)-Komplexen mit 1,2,4-Trithiolanen, 1,2,4,5-Tetrathianen, 1,2,3,5,6-Pentathiepanen sowie Thioketonen. Kristallstrukturanalyse von (Ph3P)2Pt(772-Ph2C=S) M etal Com plexes o f Functionalized Sulfur C ontaining Ligands, XV [1]. Reactions of Platinum(O) Com plexes w ith 1,2,4-Trithiolanes, 1,2,4,5-Tetrathianes, 1,2,3,5,6-Penta-thiepanes as well as Thioketones. X -R ay Structure A nalysis o f (Ph3P)2Pt(/72-Ph2C=S) W olfgang W eigand2, R alf W ünsch3, C hristian R obl3, Grzegorz M lostonb, Heinrich N öthc und M anfred Schm idt0 3,3,5,5-Tetraphenyl-1,2,4-trithiolane (1) reacts with twofold excess of (Ph3P)2Pt(?/2-C2H4) (4) to give a 1:1 mixture of the complexes (Ph3P)2Pt (SCPh2S) (6a) and (Ph3P)2Pt(?/2-Ph2C=S) (7a). Treatment of 3,3,6,6-tetraphenyl-l,2,4,5-tetrathiane (2) with a fourfold excess of 4 yields [Pt2(PPh3)4(/j-S)2] (8) and the platinum(O) compound 7a. The reaction of the 1,2,3,5,6-pentathiepane 3 with a fourfold excess of 4 affords a 1:1:1 mixture of 8, the platinum(O) complex 7b and the bis-thiolato platinum(II) complex 6b. The thioketone complexes 7a-c were formed in smooth reactions of 4 with the thioketones 5a-c. The molecular structure of (Ph3P)2Pt(?/2-Ph2C=S) (7a) has been established by single-crystal X-ray analysis. 
  Reference    Z. Naturforsch. 55b, 453—458 (2000); eingegangen am 28. Februar 2000 
  Published    2000 
  Keywords    1, 2, 4-Trithiolanes, Thioketones, Platinum Complexes 
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 Identifier    ZNB-2000-55b-0453 
 Volume    55 
72Author    R. Üdiger, B. Erterm, Ann, R. Einhold TackeRequires cookie*
 Title    Solid-State 29Si VACP/MAS NMR Studies of Silicon-Accumulating Plants: Structural Characterization of Biosilica Deposits  
 Abstract    A series of silicon-accumulating plants [different Equisetum (horse tail) species, Echium vulgare, and Symphytum officinale] were studied by solid-state 29Si NMR experiments. For this purpose, selected parts of these plants were freeze-dried and then investigated by solid-state ~9Si VACP/MAS NMR spectroscopy. The 29Si NMR spectra of these plants are quite similar and exhibit the typical pattern characteristic of polysilicic acid (amorphous silica). 
  Reference    Z. Naturforsch. 55b, 459 (2000); received February 21 2000 
  Published    2000 
  Keywords    Biomineralization, Silica, Silicon-Accumulating Plants 
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 Identifier    ZNB-2000-55b-0459 
 Volume    55 
73Author    WonK. Seoka, SunB. Yima, HeungN. Leea, T. Hom, M. K. LapötkebRequires cookie*
 Title    Synthesis, Spectroscopic Investigation, and Theoretical Study of the Ruthenium Diazide Complex [Ru(tpy)(PPh3)(N3)2]  
 Abstract    Ruthenium, Diazide, ZINDO/1 Calculations The reaction of [Ru(tpy)(PPh3)(Cl)2] (tpy = 2,2':6',2"-terpyridine) with sodium azide in acetone/water afforded [Ru(tpy)(PPh3)(N3)2]. The new Ru-diazide complex was fully char­ acterized by elemental analysis, IR, Raman, and multinuclear NMR spectroscopy. The struc­ tures, energies and vibrational frequencies of the ruthenium diazide isomers, cis-and trans-[Ru(tpy)(PMe3)(N3)2] (Me=CH0, were calculated at the semi-empirical ZINDO/1 level of theory. 
  Reference    Z. Naturforsch. 55b, 462—66 (2000); received March 10 2000 
  Published    2000 
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 Identifier    ZNB-2000-55b-0462 
 Volume    55 
74Author    B. Roßenbeck, W. S. SheldrickRequires cookie*
 Title    Chiral Copper(I) Iodide Based Porous Coordination Frameworks with Asymmetrically Substituted Bridging N-Donor Ligands  
 Abstract    Copper(I) Halides, 2-Methylpyrazine, Chiral Network The 2-dimensional coordination polymers 2.[{(CuI)2(Mepyz)2} • Mepyz] (la), (2)[CuX(Me-pyz)] (2a, X = Br; 2b, X = Cl) and ^[(C uX ^M epyz)] (3a, X = I;3b, X = Br) may be prepared by reaction of the appropriate copper(I) halide with 2-methylpyrazine (Mepyz) either in acetonitrile solution at 130 °C (2a/2b, 3a/3b) or without solvent at 20 °C (la). Mepyz ligands bridge (Culh rhomboid dimers in the chiral network of la, whose resulting 24-membered rings are large enough to accomodate an Mepyz guest molecule, la rapidly loses these guests to afford a crystalline powder (lb), that can reversibly imbibe benzonitrile molecules into its open channels. In contrast to la, the sheets of 2a/2b contain zigzag infinite CuX chains, those of 3a/3b staircase ^[C uX ] double chains as their characteristic substructures. Helical JJC ul] single chains in the 3-dimensional network of ^[C uL M epip)^ are bridged by R-2-methyl-piperazine (Mepip) ligands in a second example of 
  Reference    Z. Naturforsch. 55b, 467—472 (2000); received February 1 2000 
  Published    2000 
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 Identifier    ZNB-2000-55b-0467 
 Volume    55 
75Author    W. PreetzRequires cookie*
 Title    Synthese und Kristallstrukturen der Bis  
 Abstract    (oxalato)metallate trans-K3m iC \2(C20 4)2] * 4 H20 und c is -l^ P r C ^ ^ O ^ ] • H20 Synthesis and Crystal Structures o f the B is(oxalato)m etallates trans-K3[RhCl2(C20 4)2] • 4 H 20 and m -K 3[IrCl2(C 20 4)2] • H 20 fratts-Dichlorobis(oxalato)rhodate(III), c^-Dichlorobis(oxalato)iridate(III), Hydrogen Bonding By treatment of RhCl3 or IrCl3 with K2C20 4 the bis(oxalato)metallates trans-K3[RhCl2(C204)2] and d£-K3[IrCl2(C20 4)2] are formed. From the aqueous solutions single crystals were grown by slow diffusion of ethanol and X-ray structure determinations of trans-K3[RhCl2(C20 4)2] ■ 4 H20 (monoclinic, space group /2/m, a = 6.218(1), b = 11.837(2), c -10.357(2) A, 0 = 95.55(3)°, Z = 2) and ds-K 3[IrCl2(C i0 4)i] • H-,0 (monoclinic, space group /2/a, a = 14.060(3), b = 7.586(2), c = 23.488(5) fc 0 = 90.44(3)°, Z = 8) have been perfor­ med. The oxalato and chloro ligands of the complex anions are connected via hydrogen bonds and electrostatic interactions to water molecules and potassium ions. The potassium ions are eightfold and in one case ninefold coordinated. 
  Reference    Z. Naturforsch. 55b, 473—478 (2000); eingegangen am 25. Februar 2000 
  Published    2000 
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 Identifier    ZNB-2000-55b-0473 
 Volume    55 
76Author    K. Siegburg, W. PreetzRequires cookie*
 Title    Darstellung, n B-NMR-und Schwingungsspektren von Mononitrooctahydro  
 Abstract    closo-nonaborat(2-) und Monoaminooctahydro-c/oso-nonaborat(2-) sowie Kristallstruktur von (Ph4P)2[l-(N02)B9H8]*CH3CN Synthesis, 11B N M R and V ibrational Spectra o f M ononitrooctahydro-c/oso-nonaborate(2-) and M onoam inooctahydro-c/oso-nonaborate(2-) and Crystal Structure o f (Ph4P)2[ l -(N 0 2)B9H 8] C H 3CN Mononitrooctahydro-c/o5o-nonaborate(2-), Monoaminooctahydro-c7oso-nonaborate(2-) By electrochemical oxidation of (/?-Bu4N)2[B9H9] in the presence of nitrite ions and the base DBU in dichloromethane solution [1-(N 02)B9H8]2~ is formed. X-ray diffraction analy­ sis has been performed on a single crystal of (Ph4P)2[l-(N 0 2)B9H8] • CH3CN (monoclinic, space group P2,; a = 10.643(5), b = 32.661(5), c = 13.924(5) A, (3 = 96.68°, Z = 4). By reduction of [1-(N02)B9H8]2_ with FeS04 in aqueous alkaline solution the amino derivative [1-(NH2)B9H8]2~ is formed. The UB NMR spectra of both compounds are consistent with a monosubstituted tricapped trigonal prism. The IR and Raman spectra exhibit characteristic BB, BH, NO and NH vibrations, respectively. 
  Reference    Z. Naturforsch. 55b, 479—483 (2000); eingegangen am 4. Februar 2000 
  Published    2000 
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 Identifier    ZNB-2000-55b-0479 
 Volume    55 
77Author    B.V M Alottki, W. PreetzRequires cookie*
 Title    Darstellung und Kristallstruktur von (w-Bu4N)[ReBr5Py] Synthesis and Crystal Structure o f (A?-Bu4N )[ReBr5Py]  
 Abstract    Pentabromo(pyridine)rhenate(IV), Synthesis, Crystal Stucture By reaction of (/?-Bu4N)2[ReBr6] with pyridine and (h-Bu4N)BH4 in dichloromethane various bromo-pyridine-rhenium(III) complexes are formed which can be separated by chromatography. Electrochemical oxidation of (n-Bu4N)2[ReBr5Py] leads to (n-Bu4N)[ReBr5Py]. X-ray structure determination on a single crystal has been performed of («-Bu4N)[ReBr5Py] (monoclinic, space group P2,/n, a = 11,248(5), b = 17,192(5), c = 15,206(5) A, ß = 97,600(5)°, Z = 4). 
  Reference    Z. Naturforsch. 55b, 484—486 (2000); eingegangen am 24. März 2000 
  Published    2000 
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 Identifier    ZNB-2000-55b-0484 
 Volume    55 
78Author    Martin Schwarten, Michael Witzei, Dietrich BabelRequires cookie*
 Title    Hydratisierte Cyanoelpasolithe: Die  
 Abstract    Kristallstrukturen von (NMe4)2Li(H20)2[Cr(CN)6] und (NMe4)2Na(H20)[M(CN)6] (M = Cr, Co) Hydrated Cyano Elpasolites: The Crystal Structures of (NMe4)9Li(H~,0)2[Cr(CN)6] and (NMe4)2Na(H20)[M (CN)6] (M = Cr, Co) Hexacyanochromate(III), Hexacyanocobaltate(III), Cyano Elpasolite The results of single crystal X-ray structure determinations are reported for monoclinic (NMe4)2Li(H20) 2[Cr(CN)6] (a = 1736.7(2), = 888.0(1), c = 1659.3(1) p m ,/? = 119.33(1)°; C2/c, Z = 4) and orthorhombic (NMe4),Na(H,0)[Cr(CN)6] (a = 960.0(2), b = 885.0(2), c = 1269.8(3) pm; Pnmm, Z = 2) and (NMe4)2Na(H20)[Co(CN)6] (a = 1854.5(4), b = 853.5(1), c = 1328.7(3) pm; Pnma, Z = 4), the latter exhibiting a superstructure of the NaCr compound. The average distances within the hexacyano groups are Cr-C: 207.8 resp. 208.3 pm and Co-C: 189.5 pm. The alkali ions are incorporated into the elpasolite-like arrangement of the bigger ions as di-or monohydrated species [Li(H20) 2]+ and [Na(H20)]+ resp., becoming tetrahedrally coordinated [L i02N2] and [NaON3] within the lattice and fixed by hydrogen bridges 0-H...N as well. Some structural details and relations are discussed. 
  Reference    Z. Naturforsch. 55b, 487 (2000); eingegangen am 22. März 2000 
  Published    2000 
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 Identifier    ZNB-2000-55b-0487 
 Volume    55 
79Author    KaterinaE. Gubina3, VladimirA. Ovchynnikov3, VladimirM. Amirkhanov3, ViktorV. Skopenkoa, OlegV. ShishkinbRequires cookie*
 Title    Carbacylamidophosphates: Synthethis and Structure of N,N'-Tetramethyl-NM -benzoylphosphoryltriamide and Dimorpholido-N-benzoylphosphorylamide  
 Abstract    Carbacylamidophosphates N,N'-Tetramethyl-N"-benzoylphosphoryltriamide (I) and dimorpholido-N-benzoylphosphor-ylamide (II), and their sodium salts Nal, Nall were synthesized and characterized by means of IR and 1H, 1P NM R spectroscopy. The structures of I, II were determined by X-ray diffraction: I monoclinic, space group P2i/c with a = 10.162(3), b= 11.469(4), c = 12.286(4) A , 3 = 94.04°, V = 1428.4(8) A 3, Z = 4, Acaicd) = 1.187 g/cm3; II monoclinic, space group C2/c with a = 15.503(4), b = 10.991(3), c = 22.000(6) Ä, ß = 106.39°, V = 3596.3(17) Ä3, Z = 8, p(caicd.) = I.253 g/cm3. The refinement of the structures converged at R = 0.0425 for I, and R = 0.068 for II. In both structures the molecules are connected into centrosymmetric dimers via hydrogen bonds formed by the phosphorylic oxygen atoms and hydrogen atoms of amide groups. 
  Reference    Z. Naturforsch. 55b, 495—498 (2000); received December 1 1999 
  Published    2000 
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 TEI-XML for    default:Reihe_B/55/ZNB-2000-55b-0495.pdf 
 Identifier    ZNB-2000-55b-0495 
 Volume    55 
80Author    Kathrin Hofmann, Barbara AlbertRequires cookie*
 Title    Crystal Structure of Bis(triethylammonium)c/0so-decahydrodecaborate, [(C2H5)3NH]2[B10H 10]  
  Reference    Z. Naturforsch. 55b, 499 (2000) 
  Published    2000 
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 TEI-XML for    default:Reihe_B/55/ZNB-2000-55b-0499.pdf 
 Identifier    ZNB-2000-55b-0499 
 Volume    55 
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