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2000 (185)
81Author    V. F. Li, /. /., Si SiRequires cookie*
 Title    -Si— N — N I \ R — ► N — SiX K  
 Abstract    , S ily l -2 L iF \ /R N— N \ / Si / \ V / / \ / N—N N—N / R Si / \ R v \ . / N— Si N—N / \ (1) / X N—l / ^ A I standen ist, erfordert zum Teil die Anferti­ gung einer Kristall Strukturanalyse. In dieser Ar­ beit berichten wir über die Darstellung fünf-und sechsgliedriger Silylhydrazin-Ringe und erstmalig über Kristallstrukturuntersuchungen von isomeren Ringen. 
  Reference    Z. Naturforsch. 55b, 504 (2000) 
  Published    2000 
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 TEI-XML for    default:Reihe_B/55/ZNB-2000-55b-0504.pdf 
 Identifier    ZNB-2000-55b-0504 
 Volume    55 
82Author    Alfonso Castiñeiras3, Isabel Garcia3, Elena Bermejo3, DouglasX. WestbRequires cookie*
 Title    Structural and Spectral Studies of 2-Pyridineformamide Thiosemicarbazone and its Complexes Prepared with Zinc Halides  
 Abstract    Reduction of 2-cyanopyridine by sodium in dry methanol in presence of thiosemicar-bazide produces 2-pyridineformamide thiosemicarbazone, HAm4DH. The crystal structure of HAm4DH, which has a number of intermolecular interactions involving its five NH hydrogen atoms, has been solved. Crystal structures of the complexes prepared by reaction of HAm4DH with zinc(II) chloride, bromide and iodide have also been obtained. Neutral HAm4DH is co­ ordinated via the pyridyl nitrogen, imine nitrogen and thione sulfur atoms, and each complex is five-coordinate with two halogen ligands. The structures of the three complexes are best described as square pyramidal with [Zn(HAm4DH)l2] having the largest distortion toward a trigonal bipyramid. 
  Reference    Z. Naturforsch. 55b, 511—518 (2000); received February 4 2000 
  Published    2000 
  Keywords    2-Pyridineformamide, Thiosemicarbazone, Zinc Complexes 
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 TEI-XML for    default:Reihe_B/55/ZNB-2000-55b-0511.pdf 
 Identifier    ZNB-2000-55b-0511 
 Volume    55 
83Author    Florian Breitsameter, Peter Mayer, Alfred SchmidpeterRequires cookie*
 Title    Die Kondensation von Ylidylchlorphosphanen mit Phosphanen und Bis(diphenylphosphanyl)methan und -amin The Condensation o f Ylidyl Chlorophosphines with Phosphines and Bis(diphenylphosphino)methane and -amine  
 Abstract    Ylidyl chlorophosphanes 1 and dichlorophosphanes 2 react with trimethylsilyl phosphanes to yield the ylidyl diphosphanes 3, 4,5, 7 and the 2-ylidyl triphosphanes 8. From the reaction of compounds 1 with lithium diphosphanyl amide and diphosphanyl methanide result the ylidyl diphosphonium ylides 11 and ylidyl diphosphinimines 13. The former rearrange to give the ylidyl triphosphanyl methanes 12. The chloromethyl diphosphinimine 13c enters a cyclization to give the 1,2,3,5-azatriphosphole derivative 14, the structure of which has been solved by X-ray analysis. From the reaction of ylidyl bis(chlorophosphanes) 17 and 20 with the same reagents the 1,2,4,5-tetraphosphinine derivative 18 and the 1,2,3,5,6-azatetraphosphinine derivatives 19 and 21 are obtained. 
  Reference    Z. Naturforsch. 55b, 519—526 (2000); eingegangen am 21. Februar 2000 
  Published    2000 
  Keywords    Phosphonium Ylides, Diphosphanes, 1, 2, 3, 5-Azatriphospholes 
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 TEI-XML for    default:Reihe_B/55/ZNB-2000-55b-0519.pdf 
 Identifier    ZNB-2000-55b-0519 
 Volume    55 
84Author    WolfdieterA. Schenk, Nikolai KuhnertaRequires cookie*
 Title    Synthesis of Halfsandwich Ruthenium Complexes of Sulfinic Acid Esters [1]  
 Abstract    A series of halfsandwich ruthenium sulfinato complexes [CpRu(PR'3)2(SO:R)] (R = Me, CH 2Ph, C2H4Ph, Ph, 4 -CöH4Me; PR'3 = PM e3, 1/2 dppm) with various electronic and steric environments around the ruthenium centre, have been prepared by insertion of SO2 into a ruthenium carbon bond, by a direct ligand exchange reaction, or by oxidation of thiolato complexes with 3-chloroperoxybenzoic acid. The chiral complexes [CpRu(C0)(PPh3)(S0 2 R)] (R = Me, CH2Ph, Ph) were obtained similarly by oxidation of the corresponding thiolates with magnesium monoperoxyphthalate. Alkylation of the sulfinato complexes with oxonium salts [Rm 3 0 ]X (R" = Me, Et; X = B F 4 , PF6) gave ruthenium complexes of sulfinic acid esters, [C pRu(L)(L')(S(0)(0R ")R)]X in high yields and, for the chiral complexes, up to 82% de. The esters may be detached from the metal by ligand exchange with acetonitrile. Stronger nucleophiles such as I~ or SMe~ dealkylate the coordinated sulfinic acid esters. 
  Reference    Z. Naturforsch. 55b, 527—535 (2000); received March 20 2000 
  Published    2000 
  Keywords    Ruthenium Complexes, Sulfur Ligands, Diastereoselective Alkylations 
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 TEI-XML for    default:Reihe_B/55/ZNB-2000-55b-0527.pdf 
 Identifier    ZNB-2000-55b-0527 
 Volume    55 
85Author    G. C. Papavassiliou3, G.A M Ousdis3, C. P. Raptopouloub, A. TerzisbRequires cookie*
 Title    Some New Luminescent Compounds Based on 4-MethyIbenzylamine and Lead Halides  
 Abstract    Compounds of the general formula (CH3NH3)"_i(C H 3C6H4C H 2N H 3)2Pb"X3"+i, where X = I, Br, Cl and n= 1,2, 3,..., were prepared and characterized analytically and spectroscopically. Moreover, (CH3C6H4CH2NH3)2PbX4 and (C H ^ N H jX C ^ C e ^ C H z N H jh P b il? were charac­ terized by X-ray crystal structure analysis. Their optical absorption and photoluminescence spectra exhibit excitonic bands, even at room temperature. 
  Reference    Z. Naturforsch. 55b, 536—540 (2000); received March 6 2000 
  Published    2000 
  Keywords    Hybrides, Perovskites, Excitonic Spectra 
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 TEI-XML for    default:Reihe_B/55/ZNB-2000-55b-0536.pdf 
 Identifier    ZNB-2000-55b-0536 
 Volume    55 
86Author    Z. NaturforschRequires cookie*
 Title    Hydrogen Bonding of two l-(0-Ammonioalkyl)-2-acyl-cyclopentadienides in the Solid State  
 Abstract    A n d re a s M ü ller a n d G e rh a rd M aas The solid-state structures of a l-(0-ammoniopropyl)-2-(2-thienylcarbonyl)-cyclopenta-dienide (2) and a l-(0-ammoniopentyl)-2-(4-methoxybenzoyl)-cyclopentadienide (3) have been determined. Both betaines self-assemble by NH — O hydrogen bonds, but the motifs are different. In the ammoniopropyl case, both intramolecular and intermolecular hydrogen bonds of this type exist, the latter bond being responsible for the formation of infinite chains. In the ammoniopentyl case, intermolecular hydrogen bonds build up a two-dimensional net­ work which contains centrosymmetric dimers held together by NH • • • 0=C-aryl hydrogen bonds. 
  Reference    Z. Naturforsch. 55b, 541—545 (2000); received April 13 2000 
  Published    2000 
  Keywords    Cyclopentadienides, Hydrogen Bonding, Zw itter Ions 
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 TEI-XML for    default:Reihe_B/55/ZNB-2000-55b-0541.pdf 
 Identifier    ZNB-2000-55b-0541 
 Volume    55 
87Author    M.S S A A Haw AliRequires cookie*
 Title     
 Abstract    The synthesis and antimicrobial activity of a series of the title thiones were examined. Reaction of such thiones with hydrazonoyl halides, resulted in ring transformation to give 5-acylhydrazono derivatives of 1,3,4-thiadiazoles. The mechanisms of the studied reactions are discussed. 
  Reference    Z. Naturforsch. 55b, 546—552 (2000); received February 4. 2000 
  Published    2000 
  Keywords    Ring-Chain Tautomerism Heterocyclic Ring Transformation, 1, 3, 4-Thiadiazoles 
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 TEI-XML for    default:Reihe_B/55/ZNB-2000-55b-0546.pdf 
 Identifier    ZNB-2000-55b-0546 
 Volume    55 
88Author    Z. NaturforschRequires cookie*
 Title    Zu Strängen assoziierte Ionen [A sC14* A sCI3]  
 Abstract    _ im [Mg(NCCH3)6][A s4Cl14] Strands o f A sso c ia te d [A sC l4 -A s C l3] _ Ion s in [M g (N C C H 3) 6][A s 4C l14] S usan n e R a b e u n d U lrich M üller* Heptachlorodiarsenate(III) The reaction of arsenic, M gS 04 and S2C12 in ace-tonitrile yielded the title compound along with 4,5-dichloro-1 ,2,3-dithiazolium chloride, [C2NS2Cl2]Cl (which was formed from the solvent and S2C12). The crystal strucutre of [Mg(NCCH3)6][As4C l14] was determined by X-ray diffraction. It is triclinic, space group P i, Z = 2, R = 0.049. The Mg2+ ion is coordinated by six acetonitrile ligands. The anions consist of AsCl4_ and AsC13 units which are asso­ ciated to chains along the a axis by A s-"C l con­ tacts. Each As atom has distorted octahedral coor­ dination. 
  Reference    Z. Naturforsch. 55b, 553—555 (2000); eingegangen am 9. März 2000 
  Published    2000 
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 TEI-XML for    default:Reihe_B/55/ZNB-2000-55b-0553_n.pdf 
 Identifier    ZNB-2000-55b-0553_n 
 Volume    55 
89Author    W. WolfsbergerRequires cookie*
 Title    N-(Halogendimethylsilyl)-1 -methylphospholanimine N-(Halogenodimethylsilyl)-1 -methylphospholane Imines  
 Abstract    In stitu t für A n o r g a n isc h e C h e m ie d er U n iv e r s itä t W ü rzb u rg, 
  Reference    Z. Naturforsch. 55b, 557 (2000) 
  Published    2000 
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 TEI-XML for    default:Reihe_B/55/ZNB-2000-55b-0557.pdf 
 Identifier    ZNB-2000-55b-0557 
 Volume    55 
90Author    E. Kavlakoglu3, A. Elmali3, Y. Elerman3, H. FuessbRequires cookie*
 Title    Crystal Structure and Magnetic Properties of a (/z-Hydroxo)(/x-acetato) Dicopper(II) Complex  
 Abstract    Dinuclear Copper(II) Complex, Super-exchange Interactions, Antiferromagnetic Coupling [Cu2(L)(02CMe)] H20 (L = l,3-Bis(2-Hydroxy-l-napthylideneamino)propan-2-ol) was synthesized and its crystal structure determined. (C27H i3N->0 5 Cu2).H->0 , monoclinic, space group P2i/c, a = 11.795(3), b = 17.988(5), c = 12.005(6) A, 0 = 109.99(3)°, V = 2393(2) A3, Z = 4. Two copper(II) ions in a square-planar coordination are bridged by alkoxide and acetate oxygen atoms to form a dinuclear unit. The metal coordination sphere is four-coordinate, planar with an NO3 donor set. The dihedral angle between the two coordination planes is 6.34(9)°. The copper(II) centers are separated by 3.492(2) A and weakly antiferromagnetically cou­ pled (-2 7 = 163.6 cm-1), which follows from temperature-dependent magnetic susceptibility measurements in the temperature range 4.6 to 310 K. The Cu-O-Cu angle is 133.5(1)° in the super-exchange pathway. The weak antiferromagnetic coupling of the complex is interpreted in terms of countercomplementary effects of the different bridging ligands which participate in the super-exchange interaction. The magnetic moment at 310 K is ca. 2.7 B. M., but 0.2 B. M. at 4.6 K. The magnetic susceptibility is at a maximum near 140 K and decreases rapidly as the temperature is lowered to liquid helium temperature. 
  Reference    Z. Naturforsch. 55b, 561—566 (2000); received February 22 2000 
  Published    2000 
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 TEI-XML for    default:Reihe_B/55/ZNB-2000-55b-0561.pdf 
 Identifier    ZNB-2000-55b-0561 
 Volume    55 
91Author    K. Griesar, E. A. Soto-Bustamante, W. HaaseRequires cookie*
 Title    Darstellung und magnetische Eigenschaften einiger kristalliner Nitroxidradikale Synthesis and Magnetic Properties of Some Crystalline Nitroxide Radicals  
 Abstract    Nitroxide Radicals The syntheses of different nitroxide radicals are reported. The thermal behaviour of the ni­ troxide radicals was examined by polarizing microscopy, differential scanning calorimetry as well as X-ray diffraction experiments. Temperature dependent magnetic susceptibility mea­ surements were carried out in order to determine the magnetic properties of these nitroxide radicals. The majority of the radicals presented here show weak antiferromagnetic exchange interactions. 
  Reference    Z. Naturforsch. 55b, 567—575 (2000); eingegangen am 21. Januar 2000 
  Published    2000 
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 TEI-XML for    default:Reihe_B/55/ZNB-2000-55b-0567.pdf 
 Identifier    ZNB-2000-55b-0567 
 Volume    55 
92Author    KaterinaE. Gubinaa, VladimirA. Ovchynnikov3, VladimirM. Amirkhanov3, Helmut Fischerb, Rüdiger Stumpf, ViktorV. Skopenko3Requires cookie*
 Title    Lanthanide Complexes with Carbacylamidophosphates: The First Registration of Chelate Coordination of the Neutral Ligand Form in the Structure of Di-(N,Nf-tetramethyl-NM -benzoylphosphoryl- triamide)cerium(III) Nitrate  
 Abstract    The coordination compounds of the general formula Ln(HL)2(NC>3)3, (where Ln = La -Eu (without Pm), HL = C6HsC(0)NHP(0)[N(CH3)2]2, N,N'-tetramethyl-N"-benzovlphosphoryl-triamide) have been synthesized and characterized by means of IR, UV-VIS, H, 31P NMR spectroscopy, and X-ray analysis. The complexes are isostructural according to X-ray powder diffraction studies. The crystal structure of the cerium(lll) complex has been determined. Crystal data: monoclinic, P2i/c, with a = 10.503(9), b = 15.62(2), c = 21.91(2) Ä, ß = 99.56(8)°, Z = 4, V = 3546(6) A 3, R \ = 0.0550, wR2 = 0.1383 for 6970 unique reflections used. The complex has a molecular structure. Neutral phosphoryltriamide ligands are coordinated to the metal ion in a bidentate manner via phosphoryl and carbonyl oxygen atoms with formation of six membered chelate rings. The coordination polyhedron of the Ce atom is a sphenocorona; C.N. = 10 (4 0[H L] + 6 0 [ N 0 3-]). 
  Reference    Z. Naturforsch. 55b, 576—582 (2000); received February 14 2000 Lanthanide Carbacylamidophosphate 
  Published    2000 
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 TEI-XML for    default:Reihe_B/55/ZNB-2000-55b-0576.pdf 
 Identifier    ZNB-2000-55b-0576 
 Volume    55 
93Author    J. Belmar3, J. Téllezb, J. Baezab, J. FreerbRequires cookie*
 Title    Synthesis of E-9-Dodecen-l-yl Acetate Using Organomanganese Reagents  
 Abstract    Pheromone, Organomanganese, E-9-Dodecen-l-yl Acetate The Grignard reagent obtained from 2-(6-bromohexyloxy)-tetrahydropyrane, by treatment with anhydrous manganese(II) chloride was transformed to the corresponding organomanganese reagent, which was coupled with E-l-bromo-3-hexeneby treatment with anhydrous manganese chloride. Further deprotection and acetylation furnished E-9-dodecen-l-yl acetate. A second procedure involved the coupling of E-3-hexenylmanganese bromide and 6-bromohexyl acetate. Coupling reactions were carried out at 0 C, using as co-solvent. 
  Reference    Z. Naturforsch. 55b, 583—586 (2000); received February 1 2000 
  Published    2000 
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 TEI-XML for    default:Reihe_B/55/ZNB-2000-55b-0583.pdf 
 Identifier    ZNB-2000-55b-0583 
 Volume    55 
94Author    Mit Komplexe, KupferUnd Mangan, Zink, CarstenO. Kienitz, Carsten Thöne, PeterG. JonesRequires cookie*
 Title    Zur Koordinationschemie des 2,2'-Dipyridyldiselenids (PySeSePy), Teil 2 [1]  
 Abstract    The coordination chemistry of 2,2'-dipyridyldiselenide (PySeSePy) towards mangane­ se, copper and zinc centres has been studied. The complexes [MnBr2-/V,/V'-(PySeSePy)] (1), [CuBr2-/V,/V'-(PySeSePy)] (2), [Cu-(//-Br)-7V(/V'-(PySeSePy)]2 (3), [Cu-()U-Br)-{p-N,N'-(PySeSePy)}]" (4), [Cu-(/i-Cl)-/V,W'-(PySeSePy)]2 (5), [Zn(OOCC6F5)2-/V,/V'-(PySeSePy)] (6) and [Z n (0 S 0 2CF3)2-./V>/V'-(PySeSePy)] (7) have been synthesised and the crystal structures of 1, 3, 4 and 6 determined. 1, 3 and 6 display seven-membered metallacycles with tetrahedral coordination of the metal centres. In these cases 2,2'-dipyridyldiselenide acts as a chelating ligand. In the polymeric complex 4, 2,2'-dipyridyldiselenide acts as a bridging ligand. All com­ plexes display selenium-selenium single bonds with an average length of 232 pm. In contrast to the analogous chloro and nitrato complexes, the zinc complexes 6 and 7 are not dissociated in solution, as evidenced by 77Se NMR experiments. The corresponding resonances are shifted downfield in comparison with the ligand. 
  Reference    Z. Naturforsch. 55b, 587—596 (2000); eingegangen am 3. März 2000 
  Published    2000 
  Keywords    Manganese, Copper, Zinc 
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 TEI-XML for    default:Reihe_B/55/ZNB-2000-55b-0587.pdf 
 Identifier    ZNB-2000-55b-0587 
 Volume    55 
95Author    Hans Bocka, Andreas Seibep, Mark Sievert3, Zdenek HavlasbRequires cookie*
 Title    Wechselwirkungen in Molekülkristallen, 155 [1, 2]. Kristallzüchtung und Strukturbestimmung des Radikalkation-Salzes [Tetrahydrotetrathiafulvalenium*0 ] [ A lC l4e ] Interaction in Molecular Crystals, 155 [1,2]. Crystallization and Structure Determination of the Radicalcation Salt [Tetrahydrotetrathiafulvalenium#0 ][AlCl4e ]  
 Abstract    Hexathia-dispiro[4.0.4.4]decane, Tetrahydrotetrathiafulvalenium Radical Cation Salt, DFT Calculations 
  Reference    Z. Naturforsch. 55b, 597—602 (2000); eingegangen am 21. Dezember 1999 
  Published    2000 
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 TEI-XML for    default:Reihe_B/55/ZNB-2000-55b-0597.pdf 
 Identifier    ZNB-2000-55b-0597 
 Volume    55 
96Author    P. Schmidt, H. OppermannRequires cookie*
 Title    Zum System Bi20 3 /Bi2Se3/BiCl3,1. Das Zustandsdiagramm Bi20 3/Bi2Se3/BiCl3 On the System Bi20 3 /Bi2Se3/BiCl3,1. The Phase Diagram Bi20 3/B i2Se3/BiCl3  
 Abstract    The phase relations in the quaternary system Bi/Se/O/Cl have been studied and the existence of several new compounds in the pseudotemary area Bi20 3/Bi2Se3/BiCl3 has been established by solid state and chemical vapour transport reactions. The phase diagram is derived from X-ray powder diffraction and thermal analysisdata, and from measurements of the decomposition pressure behaviour. Three new quaternary phases with different compositions exist in the system: Bi40 4SeCl2, Bi10O 12SeCl4 and Bi220 28SeCl8. By estimation of the thermodynamic data of the quaternary phases it is possible to calculate complex heterogeneous chemical equilibria between all the binary, ternary and quaternary compounds of the phase diagram. As a result, we can describe thermodynamically the observed phase relations and the direction of thermal decomposition of the respective compounds. 
  Reference    Z. Naturforsch. 55b, 603—613 (2000); eingegangen am 2. April 2000 
  Published    2000 
  Keywords    Bismuth-Selenides-Oxides-Halides, Phase Diagram, Thermodynamic Data 
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 TEI-XML for    default:Reihe_B/55/ZNB-2000-55b-0603.pdf 
 Identifier    ZNB-2000-55b-0603 
 Volume    55 
97Author    O. Bosholm3, H. Opperm, S. DäbritzbRequires cookie*
 Title    Chemischer Transport intermetallischer Phasen, II: Das System Fe-Si Chemical Vapour Transport of Intermetallic Phases, II: The System Fe-Si  
 Abstract    Chemical Vapour Transport, Calculation of CTR, Thermodynamic Data Five phases exist in the system Fe-Si: Fe3Si, Fe2Si, Fe5Si3, FeSi, a-and /3-FeSi2. A ll phases could be prepared by chemical transport with iodine as transport agent in the temperature range between T[ (700 °C) and T2 (1030 °C). In a attempted systematic clarification of the chemical transport reactions of all phases in the system, the effective transport equilibria were determined. Thermodynamic calculations show satisfactory agreement between calcula­ tion and experiment. 
  Reference    Z. Naturforsch. 55b, 614—626 (2000); eingegangen am 3. M ärz 2000 
  Published    2000 
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 TEI-XML for    default:Reihe_B/55/ZNB-2000-55b-0614.pdf 
 Identifier    ZNB-2000-55b-0614 
 Volume    55 
98Author    P. Schmidt, H. OppermannRequires cookie*
 Title    Zur Chemie von Mischphasen in komplexen Zustandsdiagrammen Das System Bi203/Bi2Se3/Bi2Te3 Chemistry of Mixed Crystals in Complex Phase Diagrams The System Bi20 3/Bi2Se3/Bi2Te3  
 Abstract    Pseudoternary System B i20 3/B i2Se3/Bi2Te3, Phase Diagram, Thermodynamic Data The phase diagram of the pseudoternary system Bi20 3 /Bi2Se3/Bi2Te3 is found to include a quaternary solid solution Bi20 2 (Tej;Se1_A .) and ternary, intermetallic mixed crystals Bi2(TeA rSe1_ v)3. Using thermodynamic modeling of the solid solutions it is possible to calcu­ late complex heterogeneous equilibria between all phases of this phase diagram. As a result we can thermodynamically describe the observed phase relations: B i7(TevSe1 _ v)3 /JH °m(298) = 0; ZlS°m(298) = R [xlnx + (l-x)ln(l-jt)] Bi20 2 (TerSe,_*) ZlH°m(298) = Q • x(l-x); OzlS°m(298) = R/4 [xlnx + (l-x)ln(l-x)] Q = 0,6 kcal/mol 
  Reference    Z. Naturforsch. 55b, 627—637 (2000); eingegangen am 15. M ärz 2000 
  Published    2000 
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 TEI-XML for    default:Reihe_B/55/ZNB-2000-55b-0627.pdf 
 Identifier    ZNB-2000-55b-0627 
 Volume    55 
99Author    Susanne Mann, Gottfried Hüttner, Laszlo Zsolnaif, Katja Heinze, Volker Jacob, Björn Antelmann, Alexander Driess, Berthold SchiemenzRequires cookie*
 Title    Mono-and Dinuclear fri/?/i0S-Metal(II)-Complexes with Nitriles as Co-Ligands  
 Abstract    8 , 2000 m'p/jos-Metal-Templates, Cobalt, Iron The triphos ligand C H 3C (C H 2PP h2) 3 reacts with Co(BF4) 2 (aq) or Fe(BF4) 2 (aq) in the presence of nitriles R C N to produce the pentacoordinate [fA7/?^osCo(NCR)2](BF4) 2 (1) or the hexacoordinate [fr//?/zo5 F e(N C R)3](BF4) 2 (2). With a,co-dinitriles NC-X-CN dinuclear compounds [fr/p/7osFe(NC-X-CN)3Fem'/7/!os](BF4)4 (X = (C H 2) 3 (3a) X = o-C6H 4 (3b) are formed. The compound [fnp/zosFe((CH3)2C = C (C N)2)3Ferrc/?/ios](PF6) 4 (3c) is obtained from FeCl2 by addition of the triphos ligand, the dinitrile and NaPF6. A ll compounds are characterised by the usual analytical techniques including X-ray analy­ ses. It is observed that the quadruply positively charged compounds 3 tend to associate the respective anions in pockets formed by the three segments of the Fe(NC-X-CN)3Fe bridg­ ing units. 
  Reference    Z. Naturforsch. 55b, 638—650 (2000); received March 
  Published    2000 
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 TEI-XML for    default:Reihe_B/55/ZNB-2000-55b-0638.pdf 
 Identifier    ZNB-2000-55b-0638 
 Volume    55 
100Author    Li-Hong Tseng3, Detlef Emeisb, Martin Raitza3, Heidrun Händel3, Klaus Albert3Requires cookie*
 Title    Application of High-Resolution-Magic-Angle-Spinning (HR-MAS) NMR Spectroscopy to Cosmetic Emulsions  
 Abstract    H M Q C , Inversion-recovery Technique, Spin-lattice Relaxation Time (Tf) H R-M AS N M R spectroscopy was utilized for the characterization of three cosmetic emul­ sions. The emulsions had the same chemical composition and were prepared in the same way except the homogenization step. Magic angle spinning (M A S) of the emulsions was applied to improve signal resolution by eliminating susceptibility changes as well as residual dipolar interactions within the sample. Spin-lattice relaxation times (Tj) were determined according to the inversion recovery technique in the temperature range of -10 °C to 40 °C to find out phase changes of the sample ingredients. 'H and 13C N M R signals of the individual compo­ nents were assigned by use of different ID and 2D N M R experiments. The HR-M AS N M R technique offers many possibilities to further investigate samples between the liquid and the solid state. 
  Reference    Z. Naturforsch. 55b, 651—656 (2000); received March 1 2000 
  Published    2000 
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 TEI-XML for    default:Reihe_B/55/ZNB-2000-55b-0651.pdf 
 Identifier    ZNB-2000-55b-0651 
 Volume    55 
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