Go toArchive
Browse byFacets
Bookbag ( 0 )
Facet   Publication Year 2001  [X]
Facet   section ZfN Section B:Volume 056  [X]
Results  200 Items
Sorted by   
Publication Year
2001[X]
141Author    Henri Brunner, ReinhardJ. Maier, M. ZabelRequires cookie*
 Title    Enantioselective Catalysis, 139 [1]. A Chiral Cyclic Amidine Containing a Pyridine Substituent -Synthesis, Coordination Chemistry, Catalysis  
 Abstract    Amidine, Chirality, Cyclopropanation Reaction of the 1,3-diamine 1 with the methylester of /V,/V-dimethyl-L-phenylalanine 2 af­ forded the chiral cylic amidine 4 with a pyridine substituent. The CuCb complex of the hydrochloride of ligand 4 has the structure of a trigonal bipyramide. In the Cu-catalyzed cy­ clopropanation of styrene with ethyl diazoacetate inductions up to 15% ee. 
  Reference    Z. Naturforsch. 56b, 975—978 (2001); received May 17 2001 
  Published    2001 
  Similar Items    Find
 DEBUG INFO      
 TEI-XML for    default:Reihe_B/56/ZNB-2001-56b-0975.pdf 
 Identifier    ZNB-2001-56b-0975 
 Volume    56 
142Author    RaphaelJ F Berger3, MichaelA. Schmidt3, Jonas Juséliusb, Dage Sundholmb, Peter Sirsch3, Hubert Schmidbaur3Requires cookie*
 Title    Tetraberyllium-?74-oxo-hexa(arylcarboxylates)  
 Abstract    Tetraberyllium-oxo-hexabenzoate and -hexa(mesitylcarboxylate) were prepared from ben­ zoic / mesitylcarboxylic acid and freshly precipitated beryllium hydroxide in a tetrahy-drofuran / water two-phase system. The crystal structure of the benzoate was deter­ mined from Be4 0 (0 C0 Ph)6 (CöH6)3 , and that of the mesitylcarboxylate from the phase Be4 0 (0 C0 Mes)6 (CCl4). The two clusters have the /i4-oxo cage structure also detected for the acetate and nitrate complexes, and for the related hexacarbonato hexaanion. The high symmetry of the cluster allows the observation of 9Be and l70 signals in the solution NMR spectra. The terminal atoms of the rigid carboxylate groups may be expected to lie at the vertices of large octahedra enclosing the cluster molecules. The axes of the six aryl groups would thus coincide with the axes of the cartesian coordinates with the /j 4 oxygen atom at the origin. This disposition suggests a connectivity suitable for cubic lattices if p-difunctional arene-dicarb-oxylate anions are employed instead of aryl-monocarboxylate anions. However, the new results show that significant deviations of the 0 Be2 0 2 C-Ar six-membered rings from planarity cause major deviations from octahedral symmetry and therefore no connectivity in cubic symmetry is to be expected. Fragmentation of the Be4 0 (0 C0 R)6 clusters upon ionization in a mass spectrometer leads predominantly to cations [Be3 0 (0 C0 R)3]+ which can be assigned a planar, highly symmet­ rical tricyclic core structure of D,^ symmetry. Quantum chemical calculations confirm dis­ crete energy minima for these cations and show that their stability is largely due to the favourable arrangement of alternating charges of neighbouring core atoms. The high polar­ ity of Be-O bonds rules out any significant contributions from aromaticity. The reactions of Be(OH)2 with 4 -HS-C6H4 -COOH and HS(CH2)2COOH give the corresponding cluster com­ pounds Be4 0 (0 C0 RSH)ö, [R = C6 H4 , (CH2 h] with six terminal mercapto functions. 
  Reference    Z. Naturforsch. 56b, 979—989 (2001); received June 26 2001 
  Published    2001 
  Keywords    Beryllium Chemistry, Beryllium Carboxylates, Quantum Chemical Calculations 
  Similar Items    Find
 DEBUG INFO      
 TEI-XML for    default:Reihe_B/56/ZNB-2001-56b-0979.pdf 
 Identifier    ZNB-2001-56b-0979 
 Volume    56 
143Author    Falk Lissner, FrankA. Weber, Thomas SchleidRequires cookie*
 Title    Drei Formen des Samarium(III)-Sulfidselenids Sm2S2_JC Se1+A . (0,1 < x < 0,2) Three Types of the Samarium(III) Sulfide Selenide Sm2S2_ vSe1+JC (0.1 < x < 0.2)  
 Abstract    Single crystals of Sm2 S2 -jSe1+x (0.1 < x < 0.2) have been obtained for the first time through the oxidation of KSm2Cl5 with an excess of sulfur and selenium in equimolar amounts at 850 °C after seven days in evacuated silica tubes. They emerged as almost black, in thin layers deep red, lath-shaped needles (A and U type, respectively) as well as red, bead-shaped polyhedra (C type) of the gross chemical composition Sm2S2Se according to X-ray structure analyses. A much simpler method of synthesis is based on the direct fusion of the elements (samarium, sulfur and selenium) in appropriate molar ratios (2:2:1) in the presence of NaCl as a flux under otherwise analogous conditions (silica tubes, 7 d, 850 °C). A-Sm2 S1.82Se1.18 crystallizes orthorhombically (a = 753.1(3), b = 401.9(1), c = 1565.8(6) pm, Z = 4) in the space group Pnma with the a-G d2 S3-type structure. Two crystallographically different Sm3+ cations are coordinated by eight (Sm l) and seven (Sm2) Ch2~ anions (S2_ and Se2 -) as bi-and monocapped trigonal prisms, respectively. C-Sm2S! 90 Se, 10 adopts the cubic 7 -Ce2 S3-type structure (/ 43d; a = 858.7(2) pm, Z = 5.333) with trigon-dodecahedrally coordinated Snr + cations (CN = 8). Finally, U-Sm2S L84Se116 with the orthorhombic U2S3-type structure (Pnma; a = 1105.3(6), b = 399.2(1), c = 1074.0(5) pm, Z = 4) exhibits two crystallographically different Sm3+ cations again, which are coordinated by seven (Sml) and seven plus one (Sm2) Ch2_ anions, respectively. The preferential occupation of S _ and Se2-anions at only one in the C-type, but three anionic sites each in the A-and U-type crystal structures of Sm2 S2 -*Se1+;c (0 . 1 < x < 0 .2) is discussed. 
  Reference    Z. Naturforsch. 56b, 990—996 (2001); eingegangen am 14. Juni 2001 
  Published    2001 
  Keywords    Samarium, Sulfides, Selenides 
  Similar Items    Find
 DEBUG INFO      
 TEI-XML for    default:Reihe_B/56/ZNB-2001-56b-0990.pdf 
 Identifier    ZNB-2001-56b-0990 
 Volume    56 
144Author    Chnstian Näther, Inke Jeß, Harald StudzinskiRequires cookie*
 Title    Investigations on the Thermal Decomposition of Coordination Polymers Based on Copper(I) Halides and 2-Methylpyrazine  
 Abstract    The thermal behaviour of the three coordination polymers < 2..poly[CuX(/u-2-methylpyrazine-N,N')] (X = Cl (I), Br (II)), and ^poly[{C u2l2 (i M-pyrazine-N,N')2 } • 2-methylpyrazine] (III) was investigated using differential thermal analysis and thermogravimetry (DTA-TG) measure­ ments as well as temperature resolved X-ray powder diffraction in argon and in air. On heating all compounds decompose in two steps. In the first step compound I and II loose one and com­ pound III looses two of the 2-methylpyrazine ligands to form the corresponding 2:1 compounds Cu2Cl2 (2 -methylpyrazine) (IV) and c|,poly[Cu2X2 (//-2 -methylpyrazine-N,N')] (X = Br (V), I (VI)). From the experiments there is no evidence for the formation of a 1:1 compound of Cul and 2-methylpyrazine as an intermediate phase during the thermal decomposition. On further heating the 2:1 compounds IV, V and VI transform directly to the corresponding copper(I) halides. In tro d u ctio n 
  Reference    Z. Naturforsch. 56b, 997—1002 (2001); received June 8 2001 
  Published    2001 
  Keywords    Copper(I) Halides, 2-Methylpyrazine, Coordination Polymers 
  Similar Items    Find
 DEBUG INFO      
 TEI-XML for    default:Reihe_B/56/ZNB-2001-56b-0997.pdf 
 Identifier    ZNB-2001-56b-0997 
 Volume    56 
145Author    H. Ünver3, M. Kabakb, D. M. Zengin3, T. N. DurluaRequires cookie*
 Title    Crystal Structure and Tautomerism of l-[N-(4-Iodophenyl)]aminomethylidene-2(lH)naphthalenone  
 Abstract    Photochromism, Thermochromism, Keto-Enol Tautomerism l-[N-(4-Iodophenyl)]aminomethylidene-2(lH)naphthalenone (1) (C17H 12NOI) has been studied by X-ray analysis, IR, 'H NMR, UV and AMI semi-empirical quantum mechanical methods. It crystallises in the monoclinic space group P2i/n with a = 4.844(3), b = 21.428(2), c -13.726(2) A, ß = 93.07(2)° (R1 =0.032 for 4132 reflections [/> 2 a (/)]). The title compound is not planar and an intramolecular hydrogen bond connects Ol and N1 [2.530(4) A]. Com­ plementary IR, H NMR and UV measurements out. Tautomerism and conformations of the title semi-empirical quantum mechanical calculations data. In tro d u ctio n 
  Reference    Z. Naturforsch. 56b, 1003—1008 (2001); received March 28 2001 
  Published    2001 
  Similar Items    Find
 DEBUG INFO      
 TEI-XML for    default:Reihe_B/56/ZNB-2001-56b-1003.pdf 
 Identifier    ZNB-2001-56b-1003 
 Volume    56 
146Author    Bernd Wrackmeyer, Andreas Pedall, Jürgen WeidingerRequires cookie*
 Title    N-Silylaminotin Trichlorides. Synthesis and Characterisation by Multinuclear Magnetic Resonance Spectroscopy  
 Abstract    Tin, Lead, Amides N-Silyl-aminotin trichlorides, R !R2N-SnCL [R1 = R2 = SiMe3 (la), R 1 = SiMe3, R2 = 'Bu (lb), R = SiMe3, R2 = 9-borabicyclo[3.3.1]nonyl (lc), R 'R 2 = Me2 SiCH2CH2 SiMe2 (ld)] were prepared by the reaction of tin tetrachloride with the respective bis(amino)plumbylenes, (R 'R 'N ^P b 4. The analogous reactions with bis(amino)stannylenes, (R 'R 2 N)?Sn 3, afforded only mixtures of the aminotin trichlorides 1 and bis(amino)tin dichlorides, (R 'R 2 N)2 SnCl2 2 . The products were characterised by H, 1 'B, l3C, 13N, 29Si and 1 l9Sn NMR spectroscopy, and the NMR data of 1 were compared with those of the corresponding N-silylamino(trimethyl)tin compounds 8 . 
  Reference    Z. Naturforsch. 56b, 1009—1014 (2001); received June 18 2001 
  Published    2001 
  Similar Items    Find
 DEBUG INFO      
 TEI-XML for    default:Reihe_B/56/ZNB-2001-56b-1009.pdf 
 Identifier    ZNB-2001-56b-1009 
 Volume    56 
147Author    Norbert Kuhna, Martin Grathwohl3, Manfred Steimann3, Roland Boeseb, N. L. Madhavi NalambRequires cookie*
 Title    Synthese und Eigenschaften von 2-Cyanimino-l,3-dimethylimidazolin [1] Synthesis and Properties of 2-Cyanimino-l,3-dimethylimidazoline [1]  
 Abstract    Imidazoles, Nitriles, Molybdenum 2-Cyanimino-l,3-dimethylimidazoline (3, ImNCN) is obtained from l,3-dimethyl-2-imino-imidazoline (2) and BrCN. With Mo(CO)6, 3 forms the carbonyl complex (ImNCN)Mo(CO) 5 (4). The crystal structure of 3 is reported. The properties of 3 are discussed on comparison with those of (R2N)2C=NCN (1, R = H). 
  Reference    Z. Naturforsch. 56b, 1015—1019 (2001); eingegangen am 5. Juli 2001 
  Published    2001 
  Similar Items    Find
 DEBUG INFO      
 TEI-XML for    default:Reihe_B/56/ZNB-2001-56b-1015.pdf 
 Identifier    ZNB-2001-56b-1015 
 Volume    56 
148Author    Stephan Roth, Wolfgang SchnickRequires cookie*
 Title    Synthesis and Crystal Structure of (dmaaH^CdmaH^tPnSnN^NH^] * 4 dmaa, dmaa = N,N-Dimethylacetamide, dma = Dimethylamine, an Anhydrous Example of the Cage  
 Abstract    The title compound (dmaaH)2 (dmaH)2 [Pi2 Si2Ni2 (NH)2] • 4 dmaa (1) was obtained by crys­ tallization from a saturated solution of anhydrous Pi2 Si2Ns(NH)6 in N,N-dimethylacetamide (dmaa) as large single crystals. According to the X-ray structure determination (P2\/n, a = 1421.8(1), b = 1556.5(2), c = 1645.8(1) pm, ß = 112.207(6)°, Z = 2, 6388 observed reflections, R 1 = 0.046, wR2 = 0.111) the anionic cage is built up from twelve P3N3 rings in boat confor­ mation. N,N-dimethylammonium ions (dmaH+) are directly connected to the cage, and pairs of N,N-dimethylacetamidonium ions (dmaaH+) and N,N-dimethylacetamide molecules (dmaa) are interconnected by hydrogen-bonds. 
  Reference    Z. Naturforsch. 56b, 1020—1024 (2001); received July 18 2001 
  Published    2001 
  Similar Items    Find
 DEBUG INFO      
 TEI-XML for    default:Reihe_B/56/ZNB-2001-56b-1020.pdf 
 Identifier    ZNB-2001-56b-1020 
 Volume    56 
149Author    Markus Ströbele, H.-Jtirgen MeyerRequires cookie*
 Title    Synthesen  
 Abstract    , Kristallstrukturen und magnetische Eigenschaften von [Li(12-Krone-4)2][Li(12-Krone-4)(OH2)]2[Nb6Cl18], [Li(15-Krone-5)2(OH2)]3[Nb6Cl18] und [(18-Krone-6)2(0 2H5)]3[Nb6Cl18] Syntheses, Crystal Structures and Magnetic Behaviour of [Li(12-crown-4)2 ] [Li(12-crown-4)OH2 ]2 [Nb6Cl x8], [Li(15-crown-5)2(OH2)]3[Nb6C l18], and [(18-crown-6)2(0 2H5)]3[Nb6C l18] The title compounds were prepared through reactions of Li2Nb6Cl16 with the corresponding crown ethers in acetone. All three compounds were obtained as dark brown crystals. Their structures were solved with the means of single-crystal X-ray diffraction. [Li(12-crown-4),][Li(12-crown-4)(OHi)]2 [Nb6Cl 18]: space group P 2 ,In, Z =2, a = 1320.4(1), b = 1879.1(1), c = 1321.7(1) pm, ß = 92.515(6)°, P, = 0.0297 (I>2a(I)). The crystal structure contains Li+ sandwiched by two 12-crown-4-ethers plus Li+ coordinated by one 12-crown-4-ether and one water molecule. [Li(15-crown-5)2(OH2)]3[Nb6C l|8]: space group R3, Z = 3, a = b = 2081.7(1), c = 1991.7(1) pm, R\ = 0.0395 (/ > 2<r(/)). In the crystal structure Li+ and one water molecule are sandwiched by two 15-crown-5-ethers. [(18-crown-6)2(0 2H5)]3[Nb6Cl18]: space group P i, Z = 1 ,a = 1405.1(1),/?= 1461.1(2), c = 1492.2(2) pm; a = 98.80(1)°, ß = 98.15(1)°, 7 = 97.41(1)°, P, = 0.0538 (/ > 2a(I)). H5 0 2+ was found in the structure refinement sandwiched between two 18-crown-6-ethers. All compounds reported contain [Nb6Cl18] clusters with Nb-Nb distances between 299 and 301 pm. The paramagnetic behaviour expected for [Nb6C l|8]3~ in all three compounds was confirmed by magnetic measurements. 
  Reference    Z. Naturforsch. 56b, 1025—1034 (2001); eingegangen am 5. Juli 2001 
  Published    2001 
  Keywords    Niobium Cluster, Chloride, Crown Ether 
  Similar Items    Find
 DEBUG INFO      
 TEI-XML for    default:Reihe_B/56/ZNB-2001-56b-1025.pdf 
 Identifier    ZNB-2001-56b-1025 
 Volume    56 
150Author    Ar=., ►.V \ Ar—pf+, A. R. —p, C., +. \. S—, C-NRequires cookie*
 Title     
  Reference    Z. Naturforsch. 56b, 1035 (2001) 
  Published    2001 
  Similar Items    Find
 DEBUG INFO      
 TEI-XML for    default:Reihe_B/56/ZNB-2001-56b-1035.pdf 
 Identifier    ZNB-2001-56b-1035 
 Volume    56 
151Author    Requires cookie*
 Title    Polysulfonylamine, CXLII [1]. Ein supramolekulares Monomer-Dimer-Paar: Starke und schwache Wasserstoffbrücken in den Kristallstrukturen von Pyridinium-dimesylamid und 4,4'-Bipyridindiium-bis(dimesylamid)  
  Reference    Z. Naturforsch. 56b, 1041 (2001) 
  Published    2001 
  Similar Items    Find
 DEBUG INFO      
 TEI-XML for    default:Reihe_B/56/ZNB-2001-56b-1041.pdf 
 Identifier    ZNB-2001-56b-1041 
 Volume    56 
152Author    Requires cookie*
 Title    Polysulfonylamine, CXLIII [1], Rolle schwacher Wasserstoffbrücken (C -H «**0) in den Kristallstrukturen von 2,6-Dimethylpyridinium-, 1-Hydroxypyridinium-und Imidazolium-dimesylamid  
  Reference    Z. Naturforsch. 56b, 1052 (2001) 
  Published    2001 
  Similar Items    Find
 DEBUG INFO      
 TEI-XML for    default:Reihe_B/56/ZNB-2001-56b-1052.pdf 
 Identifier    ZNB-2001-56b-1052 
 Volume    56 
153Author    Z. NaturforschRequires cookie*
 Title    Synthesis and Structural Studies of 5 ,11,17, 23-Tetrahydroxyresorc[4]arenes  
 Abstract    T horsten G erk e n sm e ie r3, C eno A g e n a 3, W aldem ar Iw anekb, R oland Fröhlich0, Sirpa K otilad, C h ristian Näther®, and Jochen M attay3 Hydroxyresorc[4]arenes, Hydrogen Bonding Hydroxyresorc[4]arenes are bowl-shaped calixarene compounds. Herein we report the synthe­ sis and the results of X-ray diffraction examinations of six hydroxyresorc[4]arenes, one of them could be crystallized in two conformations. All compounds co-crystallize with different solvent molecules, linked together by hydrogen bonds. It is known that hydroxyresorc[4]arenes are capa­ ble of forming large aggregates, a number of different compounds have been prepared, some of them could be crystallized and investigated by single crystal methods. Most of the compounds tend to form polarity-induced double layers. 
  Reference    Z. Naturforsch. 56b, 1063—1073 (2001); received March 16 2001 
  Published    2001 
  Similar Items    Find
 DEBUG INFO      
 TEI-XML for    default:Reihe_B/56/ZNB-2001-56b-1063.pdf 
 Identifier    ZNB-2001-56b-1063 
 Volume    56 
154Author    SamRequires cookie*
 Title    Enaminones as Building Blocks In Heterocyclic Synthesis: A New One Pot Synthesis of Polyfunctional Substituted Pyridines  
 Abstract    ia M ichel A gam y3, M ervat M oham m ed A bdel-K halik3, M ona H assan M o ham edb, and M oham m ed H ilm y E lnagdi b 
  Reference    Z. Naturforsch. 56b, 1074 (2001) 
  Published    2001 
  Similar Items    Find
 DEBUG INFO      
 TEI-XML for    default:Reihe_B/56/ZNB-2001-56b-1074.pdf 
 Identifier    ZNB-2001-56b-1074 
 Volume    56 
155Author    YonghongD. Enga, M. Anoelson, T. Ianasoa-R, Am Am, JohnK. Onjyb, SnyderaRequires cookie*
 Title    Remangilone D, a New Bisnoroleanane Triterpene, and a New Flavone from Physena madagascariensis [1]  
 Abstract    , 2001 Physena madagascariensis, Triterpene, Flavone A new dinoroleanane triterpene, remangilone D (4), and a new flavone 6 , have been isolated from the leaves of Physena madagascariensis (Physenaceae). 
  Reference    Z. Naturforsch. 56b, 1079—1083 (2001); received May 28 
  Published    2001 
  Similar Items    Find
 DEBUG INFO      
 TEI-XML for    default:Reihe_B/56/ZNB-2001-56b-1079.pdf 
 Identifier    ZNB-2001-56b-1079 
 Volume    56 
156Author    W. Olfgang, Beck, Sonderdruckanforderungen An, ProfW. BeckRequires cookie*
 Title    M etallkomplexe mit biologisch wichtigen Liganden, CX X X IX [1], Ein Ferrocenylen-verbrücktes Pseudohexapeptid Fe[C5H 4CH 2O G lyValO M e(V al-Boc)]2  
 Abstract    M etal C om plexes of Biologically Im p o rtan t Ligands, C X X X IX [1]. A Ferrocenylene B ridged Pseudohexapeptide Fe[C 5 H 4 C H 2 O G lyB alO M e(V al-B oc) ] 2 H a ra ld D ialer, W olfgang Steglich Ferrocene, Peptide The reaction of the a-chloro tripeptide Boc-Val-DL-Gly(Cl)-ValOMe with l,l'-bis(hydroxy-methyl)ferrocene gives a ferrocenylene bridged pseudohexapeptide which was characterized by its analytical, spectroscopic and ms data. 
  Reference    Z. Naturforsch. 56b, 1084—1086 (2001); eingegangen am 14. August 2001 
  Published    2001 
  Similar Items    Find
 DEBUG INFO      
 TEI-XML for    default:Reihe_B/56/ZNB-2001-56b-1084_n.pdf 
 Identifier    ZNB-2001-56b-1084_n 
 Volume    56 
157Author    Jürgen Senker3, Jens LüdeckebRequires cookie*
 Title    Structure Determination for the Crystalline Phase of Triphenyl Phosphite by Means of Multi-Dimensional Solid-State NMR and X-Ray Diffraction  
 Abstract    The crystalline phase of triphenyl phosphite P(OCöH5)3 was investigated by means of 11P solid-state NMR and X-ray diffraction in a temperature range between 170 K and its melting point (Tm = 293 K). ID MAS NMR spectra exhibit one sharp central resonance indicating only one crystallographically unique molecule in the unit cell. A theoretical analysis concerning the shape of 2D exchange spectra for 1 = 1 /2 nuclei is presented. It is shown that if the exchange is caused by radio-frequency driven spin-diffusion, this technique allows to discriminate rota­ tional symmetry elements in crystalline solids. Used on crystalline triphenyl phosphite, 3-fold symmetry could be revealed clearly. Structure determination based on X-ray single crystal diffraction data collected at 191 K shows that triphenyl phosphite crystallises in hexagonal metric with space group R3 (w R i = 8.3%, Z = 18) and one molecule in the asymmetric unit. This result is in excellent agreement with the NMR spectroscopic data. The lattice parameters at 200 K were determined to a = 37.887(1) and c = 5.7567(2) Ä (V = 7156(1) A3) by refining an X-ray powder-diffraction pattern. The structure of triphenylphosphite can be described as a close rod packing. The rods are formed by ecliptically arranged triphenylphosphite molecules. Due to the 3-fold rotoinversion axis the orientation of molecules in neighboured rods is anti­ parallel. 
  Reference    Z. Naturforsch. 56b, 1089—1099 (2001); received July 18 2001 
  Published    2001 
  Keywords    Triphenyl Phosphite, Structure Determination, Solid-State NMR 
  Similar Items    Find
 DEBUG INFO      
 TEI-XML for    default:Reihe_B/56/ZNB-2001-56b-1089.pdf 
 Identifier    ZNB-2001-56b-1089 
 Volume    56 
158Author    Fritz Preuss, Monika Vogel, Uwe Fischbeck, Jens Pemer, Gerhard Overhoff, Edith Fuchslocher, Frank Tabellion, Barbara Geiger, Gotthelf WolmershäuserRequires cookie*
 Title    Amido-terf-butylimido-vanadium(V)-Verbindungen. Darstellung, Reaktionen und 51V-NMR-spektroskopische Untersuchungen Amido-rm-butylimidovanadium(V) Compounds. Synthesis, Reactions and 51V NMR Spectroscopic Studies  
 Abstract    Amido-terf-butylimido-vanadium(V) Compounds,51V NMR Spectra The reactions of 'BuN = VC12 • DME with LiX (X = NH'Bu, NR2, OSiPh3, SR, Alkyl, Cp) have been studied. LiNH'Bu and LiCH3 furnish the binuclear diamagnetic terr-butylimido-vana-dium(IV) compounds [(/x-NrBu)2V2X4]; in all other cases only the vanadium(V) compounds /BuN=VX3 and 'BuN=VCpCl2 formed by disproportionation reactions of vanadium(IV) can be isolated. The syntheses of various mononuclear amido terf-butylimido-vanadium(V) complexes as well as of the binuclear complexes [(^-N'Bu)2V2(N'Bu)2C12] and [(^-0)V 2(N'Bu)2Cp2Cl2] are also described. All compounds obtained have been characterized by 5rV NMR spectroscopy. fBuN=V(OMe)3 was investigated by X-ray diffraction analysis; the molecular structure has been found to be that of a binuclear vanadium(V) complex with two bridging methoxo ligands. 
  Reference    Z. Naturforsch. 56b, 1100—1108 (2001); eingegangen am 27. Juni 2001 
  Published    2001 
  Similar Items    Find
 DEBUG INFO      
 TEI-XML for    default:Reihe_B/56/ZNB-2001-56b-1100.pdf 
 Identifier    ZNB-2001-56b-1100 
 Volume    56 
159Author    Requires cookie*
 Title    /?m-Interactions in Naphthalenes, 5 [1]. On the Impact of p e ri-Stress and Trityl-Stress upon the Length of N+-C Bonds in 1-Azonia-acenaphthene Cations  
  Reference    Z. Naturforsch. 56b, 1109 (2001) 
  Published    2001 
  Similar Items    Find
 DEBUG INFO      
 TEI-XML for    default:Reihe_B/56/ZNB-2001-56b-1109.pdf 
 Identifier    ZNB-2001-56b-1109 
 Volume    56 
160Author    Matthias Dahm, Arnold AdamRequires cookie*
 Title    [Co(NH3)6]C1C03 -ein Hexaammincobalt(III)-Komplex mit einer 'idealen' Carbonat-Gruppe [Co(NH3)6]C1C03 -a Hexaamminecobalt(III) Complex with an 'Ideal' Carbonate Group  
 Abstract    Hexa(ammine)cobalt(III)-Carbonate Complex, Vibrational Spectroscopy, Thermal Analysis [Co(NH3)6]C1C03 crystallizes in the cubic space group P 2 ,3 (No. 198)witha = 1000,5(2)pm, VEZ = 1001,4(3) • 10 pm3, Z = 4. Structural features are discrete [Co(NH3)6]3+, C 0 32-and C1" ions, connected by N-H O and N-H -Cl bonds. The site symmetry of the carbonate group is C3, but vibrational spectroscopy shows that the C 0 32-group is planar with local symmetry D3h. 
  Reference    Z. Naturforsch. 56b, 1117—1122 (2001); eingegangen am 26. Juli 2001 
  Published    2001 
  Similar Items    Find
 DEBUG INFO      
 TEI-XML for    default:Reihe_B/56/ZNB-2001-56b-1117.pdf 
 Identifier    ZNB-2001-56b-1117 
 Volume    56 
Prev
...
6
7
8
9
10
Next