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1996 (295)
141Author    Stefan Peschep, Werner Paulusb, DietrichB. Abel, HerrnRequires cookie*
 Title    Die Kristallstrukturen der Eisen-und Cobalt-Hexacyanokomplexe Rb2LiM(CN)6 und Rb2NaM(CN)6 The Crystal Structures of the Iron-and Cobalt-Hexacyanocomplexes Rb2LiM(CN)6 and Rb2NaM(CN)6  
 Abstract    Crystal Structure, Hexacyanoferrate(III), Hexacyanocobaltate(III), Cyano Cryolite, Neutron Diffraction The crystal structures of four isotypic cyano complexes, belonging to the monoclinic type of cryolite (P2,/n, Z = 2), were determined by single crystal X-ray methods and in one case also by neutron diffraction: RbiLiFe(CN)6 (a = 717.3, b = 748.0, c = 1030.2 pm, ß = 90.24°; Fe -C = 193.6, C -N = 114.5, Li -N = 227.0 pm), Rb,NaFe(CN)6 (a = 724.5, b = 772.5, c = 1055.2 pm, ß = 90.39°; Fe -C = 193.9, C -N = 114.2, Na -N = 250.4 pm), Rb,LiCo(CN)6 (a = 715.5, b = 741.2, c = 1025.0 pm, ß = 90.14°; Co -C = 189.6, C -N = 114.3, Li -N = 226.9 pm), Rb2NaCo(CN)6 (a = 722.5, b = 766.3, c = 1049.2 pm, ß = 90.33°; Co -C = 189.9 (188.8), C -N = 113.4 (7/5.5), Na -N = 250.6 (249.6 pm). The irregular [RbN8l coordination polyhedra exhibit average distances close to Rb -N = 336 pm. Details are discussed and the results compared with those of related compounds. 
  Reference    Z. Naturforsch. 51b, 826—831 (1996); eingegangen am 20. Dezember 1995 
  Published    1996 
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 Identifier    ZNB-1996-51b-0826 
 Volume    51 
142Author    KonstantinV. Domasevitch, VictorV. Skopenko, EduardB. RusanovRequires cookie*
 Title    Synthesis, Infrared and X-Ray Studies of Diphenyltellurium(IV) Nitrosocarbamylcyanmethanides. X-Ray Evidence for Stability of a Tritelluroxane Fragment -P h 2T e-0 -P h 2T e-0 -P h 2Te  
 Abstract    Tellurium(IV), Oximes, X-Ray Diphenyltellurium(IV) derivatives of the types Ph2Te{ACO}2 (1), Ph4Te2 0 {AC0}2 (2) and PhöTe.^C^ACO^ (3) (ACO = nitrosocarbamylcyanmethanide _ 0 NC(CN)C(0)NH2) have been prepared. The IR spectroscopic data reveal that the ambidentate ligands are coordinated to the tellurium(IV) atom in a monodentate manner via the nitroso oxygen atom. The crystal and molecular structure of 3 has been determined from X-ray diffraction data (triclinic, space group Pi with a = 12.382(2), 6=13.100(2), c = 14.944(3) Ä, a = 87.74(1), ß = 85.04(2), 7 = 66.29(1)°, V = 2211.0 A , Z = 2, R = 0.040). The structure is made up of unsymmetric molecules, in which the tellurium atoms are linked by oxo bridges to form chains Te-O-Te-O-Te (d(Te-O) ca. 1.94-2.09 A). The T e-0 (nitroso group) bond lengths are in the range 2.33 -2.36 A. 
  Reference    Z. Naturforsch. 51b, 832—837 (1996); received September 19 1995 
  Published    1996 
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 Identifier    ZNB-1996-51b-0832 
 Volume    51 
143Author    NilsW. Iberg, SusanneW. AgnerRequires cookie*
 Title    Zur Reaktivität des Germaethens Me2Ge=C(SiMe3)2: Mechanistische Aspekte der Diels-Aider-und En-Reaktionen [1]  
 Abstract    O n the Reactivity o f G erm aeth en e M e2G e=C (S iM e3)2: M echanistic A spects of Diels A ld er and Ene R eactions [1] Diels-Alder and ene reactions of germaethene Me2Ge=C(SiMe3)2 (2) with butadienes I I I >C=C-C=C< and propenes >C=C-CH<, respectively, take place regioselectively, as well as stereoselectively. They are accelerated by an increasing tendency of substituents in butadiene or propene to donate electrons (e.g. 2-methylbutadiene > butadiene; 2-methylpropene > pro-pene), and retarded by an increasing bulkyness of substituents in 1,4-or 1,3-positions (e.g. 1-methylbutadiene > 2-methylbutadiene; 1-vinylpropene > propene). It is concluded from 
  Reference    Z. Naturforsch. 51b, 838—850 (1996) 
  Published    1996 
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 Identifier    ZNB-1996-51b-0838 
 Volume    51 
144Author    B. Ernd, W. Rackm Eyer, D. Örfler, W. Olfgang Milius, M. Ax, H. ErberholdRequires cookie*
 Title    ,1-Organoboration of Trimethyl-l-propynyltin Using Diorganoboryl-Substituted Ferrocenes  
 Abstract    The reactions of various diorganoborylferrocenes, F c -B R 2 [1, R = Me (a), Et (b), 'Pr (c), 'Bu (d), Ph (f), R2B = 9-borabicyclo[3.3.1]nonyl (e)] and 1,1 '-bis(9-borabicyclo[3.3.1]nonyl)-ferrocene (2) with trimethyl-l-propynyltin (3) were studied, and the products of the 1,1-organoboration were characterized as the alkenyltin compounds 4 -6 by 'H, UB, 13C and 119Sn NMR. In the cases of l a -I d and If, there is competition between the transfer of a ferrocenyl group and the other organyl groups R from boron to carbon, whereas in the case of the 9-borabicyclo[3.3.1]nonane derivatives le and 2, the enlargement of the bicyclic system takes place selectively (compounds 4e and 6). The molecular structure of the product 6, obtained from the reaction between the l,l'-diborylated ferrocene 2 and two equivalents of 3, was determined by single crystal X-ray analysis (space group P2x!c\ monoclinic; Z = 4, a = 958.3(2), b = 1610.4(3), c = 2405.3(5) pm and ß = 90.33(3)°). 
  Reference    Z. Naturforsch. 51b, 851 (1996); received October 26. 1995 
  Published    1996 
  Keywords    Ferrocenes, Trimethyl-l-propynyltin, 1, 1-Organoboration, Alkenyltin Compounds, X-Ray 
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 Identifier    ZNB-1996-51b-0851 
 Volume    51 
145Author    B. Ernd, W. Rackm Eyer, A. Lexandra, G. LöckleRequires cookie*
 Title    Synthesis of Pentaalkyl-6-bromo-2,3,4,5-tetracarba-mWo-hexaboranes(6)  
 Abstract    2,3,4.5-Tetracarba-m'do-hexaboranes(6), Exchange Reactions, NMR Spectra 
  Reference    Z. Naturforsch. 51b, 859—864 (1996); received November 22 1995 
  Published    1996 
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 Identifier    ZNB-1996-51b-0859 
 Volume    51 
146Author    H. V., A. Fischerb, P. G. JonesbRequires cookie*
 Title    Eine unerwartete Synthese des Triphenyphosphazenium-chlorids, [(C6H5)3PNH2]+CI_ und eine Neubestimmung seiner Kristallstruktur  
 Abstract    Triphenylphosphazenium chloride has been prepared by the reaction of triphenylphos-phine with trimethylsilylazide in impure, wet dichloromethane. Yields are improved as stoi­ chiometric quantities of w ater are added. Colourless crystals are obtained by recrystallization from the same solvent. The crystals are triclinic, space group P I, Z=2, a = 894,6(3), b -979,8(3), c = 1142,9(4) pm, a = 107,27(3), ß = 93,70(3), y = 92,97(3)°. In the solid state the compound exists as [(C6H 5)3PNH2]+ cations, and Cl-anions. Dimeric units are formed by H-bonding. The crystal structure contains one molecule CH 2C12 per one molecule (C6H 5)3PNH2C1. The cation has a slightly irregular tetrahedral geometry around the P-atom with a relatively short P-N bond. 
  Reference    Z. Naturforsch. 51b, 865—868 (1996); eingegangen am 21. O ktober 1995 
  Published    1996 
  Keywords    Triphenylphosphazenium Chloride, Synthesis, Crystal Structure 
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 Identifier    ZNB-1996-51b-0865 
 Volume    51 
147Author    R.Alf Feldhaus, JensK. Öppe, R. Ain, ErM. AttesRequires cookie*
 Title    Komplexe eines vierzehngliedrigen Tetraazadibenzo  
 Abstract    Makrocyclus. Strukturen des freien und zweifach protonierten Liganden und seiner Nickel(II)-, Kupfer(II)-, Zink(II)-und Palladium(II)-Komplexe C om plexes of a 14-M em bered N 4 D ibenzo M acrocycle. Crystal S tructures of the Free and D ip ro to n ated Ligand and of its N ickel(II), C o p p er(II), Z in k (II) and P alladium (II) C om plexes The synthesis and structural characterisation of complexes of the 14-membered macrocy­ clic trans-N4 dibenzo ligand 5,6,7,8,9,14.15,16,17,18-decahydrodibenzo[e,l][l,4, 8,1 l]-tetraaza-cyclotetradecine (L2) is described. The crystal structures of six compounds were determined by single crystal X-ray diffraction. The free ligand L2 has a saddle-shaped structure with short intramolecular hydrogen bonds. The N —N distances are 289 pm. The diprotonated species [H2L2]2+ has a different conformation due to intra-and intermolecular hydrogen bonds. TTie ligand is folded along an N —N axis in c/s-[Ni(L2)(H 20) 2]2+, but displays a saddle­ shaped structure in the Cu(II), Z n(II) and Pd(II) complexes with a more or less planar arrangem ent of the four N donor atoms. The metal atoms are incorporated within the macro-cyclic cavity in [Cu(L2)(CF3S03)]+ and [Pd(L2)]2+. The metal-to-nitrogen bond lengths herein are rather small. Zn(II) is five-coordinate in [Zn(L2)(Cl)]+. The coordination polyhedron is intermediate between a trigonal bipyramid and a square pyramid. In all complexes the metal-to-ligand distances originating at the nitrogen atoms in /^-position (with respect to the arom a­ tic ring) are significantly shorter then the donor bonds of the 1 anilinic' N atoms. 
  Reference    Z. Naturforsch. 51b, 869—878 (1996); eingegangen am 6. November 1995 
  Published    1996 
  Keywords    Macrocyclic N4-Donor Ligands, Transition Metal Complexes, Crystal Structures 
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 Identifier    ZNB-1996-51b-0869 
 Volume    51 
148Author    KlausA. Ngerm Aier, B. Ert, Schm IdbaurRequires cookie*
 Title    Preparation and Structure of Poly(gold)telluronium Salts  
 Abstract    Telluronium Complexes, Gold(I) Complexes, Tri-and Tetra(gold)telluronium Salts, Auriophilicity, Crystal Structure Tris[(triphenylphosphine)gold(I)]telluronium tetrafluoroborate (1) was prepared from the corresponding oxonium salt and bis(/-butyldimethylsilyl)tellurium in dichloromethane at -7 8 °C. The product forms yellow crystals, thermally stable to 125 °C. It was identified by standard analytical and spectroscopic techniques, including a single crystal X-ray diffraction study. In the crystal lattice, the cations form tellurium-capped triangles of gold, which are associated into dimers through short intermolecular A u -A u contacts, resembling those in the corresponding sulfur and selenium compounds. -The reaction of (r-BuMe2Si)2Te with four equivalents of [(Ph3P)Au]BF4 in tetrahydrofuran at -7 8 °C gives a tetranuclear com­ pound, {[(Ph3P)Au]4Te}2+ 2 BF4-(2) which differs from 1 in its analytical and spectroscopic data. Its structure could not be determined, but it is assumed that the dications have a square pyramidal geometry. 
  Reference    Z. Naturforsch. 51b, 879—882 (1996); received December 22 1995 
  Published    1996 
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 Identifier    ZNB-1996-51b-0879 
 Volume    51 
149Author    -PW. Erner, HkM. Üller-BuschbaumRequires cookie*
 Title      
 Abstract    Lead, Rare Earth Aluminate, Crystal Structure Single Crystals of Pb2LnAl30 8 (Ln = Eu, Gd) have been prepared_by flux techniques. The compounds crystallize with cubic symmetry, space group Oh-Pn3m, fl(Eu) = 9.4578(5), fl(Gd) = 9.4448(7) A, Z = 4. The crystal structure is characterized by heterocubane units of the type Pb40 4 and hexagonal bipyramids of oxygen around the rare earth ions. These com­ ponents form a network made of macro polyhedra of the type Pb404-L n 0 6-P b 404. Synthese und Kristallstruktur von Pb2LnAl30 8 (Ln = Eu, Gd) 
  Reference    Z. Naturforsch. 51b, 883—887 (1996); eingegangen am 16. O ktober 1995 
  Published    1996 
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 Identifier    ZNB-1996-51b-0883 
 Volume    51 
150Author    G. Eorge Sosnovsky, Jan Lukszo, C. Ert, BraschRequires cookie*
 Title    Preparation of an Aminoxyl Analog of the Anticancer Agent Miltefosine  
 Abstract    The synthesis and a few properties of hexadecyl 2-[N,N-dimethyl-N-(2,2,6.6-tetramethyl-l-oxyl-piperidin-4-yl)ammonio] ethyl phosphate are described. This compound is a spin la­ beled analog of the antineoplastic drug hexadecylphosphocholine (Miltefosine). 
  Reference    Z. Naturforsch. 51b, 888—890 (1996); received Decem ber 11 1995 
  Published    1996 
  Keywords    Anticancer Agents, Aminoxyl, Nitroxyl, Synthesis 
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 Identifier    ZNB-1996-51b-0888 
 Volume    51 
151Author    W. Ilhelm, V. D. Ahlhoff, K. Arin, R. Adkow SkiRequires cookie*
 Title    Synthesis of Methyl 6-Deoxy-6-diphenylphosphino-«-D-glucopyranoside: Temperature-Dependence of the Primary O-Tosyl Cleavage Mode  
 Abstract    Carbohydrates, Carbohydrate-Phosphines, O-Tosyl Cleavage (C-O/S-O), Chiral Phosphine Ligand Methyl a-D-glucopyranoside is converted to methyl 6-p-toluenesulfonyl-2,3,4-tris-0-tri-methylsilyl-a-D-glucopyranoside 2 and then reacted with lithium diphenylphosphide in THF. When the reaction is carried out at room tem perature and below, S-O cleavage dominates giving methyl 2,3,4-tris-O-trimethylsilyl-a-D-glucopyranoside 3 , whereas at 60°C in TH F or at 35°C in diethyl ether, C-O cleavage occurs yielding the title carbohydrate-phosphine 4 in good yield after deprotection. 
  Reference    Z. Naturforsch. 51b, 891—896 (1996); received November 29 1995 
  Published    1996 
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 Identifier    ZNB-1996-51b-0891 
 Volume    51 
152Author    Hans Ch, Krebs, Petra SollingerRequires cookie*
 Title    Triterpene Glycosides from Polygala klotzschii  
 Abstract    Polygala klotzschii is a toxic plant growing in Brazil. From the methanolic extract of its leaves, two triterpene glycosides could be isolated. Their structures have been determined by spectro­ scopic means as well as through degradation reactions and by preparing the alditolacetates. The glycosides were identified as 28-0-[/3-D-glucofuranosyl(l-2)-/3-D-xylopyranosyl(l-4)-a-L-rhamnopyranosyl(1 -4)-[a-D-xylopyranosyl(1 -3)]-/3-D-xylopyranosyl]-3-0-/3-D-glucopyrano-syl-medicagenate (1) and 28-0-[a-L-rhamnopyranosyl(1 -4)-a-L-rhamnopyranosyl(1 -4)-[/3-D-xylofuranosyl(l-2)-/3-D-xylopyranosyl(l-3)]-/^-D-xylopyranosyl]-3-0-/?-D-glucopyranosyl-16a-hydroxymedicagenate (2) respectively. 
  Reference    Z. Naturforsch. 51b, 897—900 (1996); received November 10 1995 
  Published    1996 
  Keywords    Polygala klotzschii, Polygalaceae, Triterpene Glycosides, Medicagenic Acid, löa-Hydroxy-medicagenic Acid 
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 Identifier    ZNB-1996-51b-0897 
 Volume    51 
153Author    TorstenK. Nießa ', RolandM. AyerbRequires cookie*
 Title    Synthese und Redoxverhalten schwefelsubstituierter Naphthochinone-1,4 Synthesis and Redox B ehaviour o f Sulfur Substituted N aphthoquinones-1,4  
 Abstract    Naphthoquinones, 4.5-Dithio-l,3-dithiol-2-thiones, Redox Behaviour, Cyclic Voltammetry Chloro substituted naphthoquinones-1,4 1 react with di-Na-4,5-dithio-l,3-dithiol-2-thiones 2 and other dithiolates to give new sulfur containing heterocyclic quinones 3 and 4 as pos­ sible preliminary states to synthesize tetrathiafulvalenes. The reaction of 1 with di-Li-2,2-bis(methylthio)-l,l-ethylendithiol 8 yields the appropriate bis-(methylthio)methylen substitu­ ted naphthoquinones 9. The redox behaviour of the new compounds was investigated by cyclic voltammetry. 
  Reference    Z. Naturforsch. 51b, 901—904 (1996); eingegangen am 1. Dezember 1995 
  Published    1996 
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 Identifier    ZNB-1996-51b-0901 
 Volume    51 
154Author    D. Irk Johrendt, R. Einer, M. Iericke, A.Lbrecht MewisRequires cookie*
 Title    Neue Pnictide mit modifizierten A1B2-Strukturen New Pnictides with M odified A1B2-Type Structures  
 Abstract    Nine new compounds A M X with A: Ca, Sr, Ba, M: Pd, Au and X : P, As were prepared by heating mixtures of the elements and investigated by X-ray methods. They crystallize in modified A1B2-type structures, for the present examples in the ZrBeSi-and SrPtSb-types, with an ordered distri­ bution of the atoms. 
  Reference    Z. Naturforsch. 51b, 905—906 (1996); eingegangen am 6. November 1995 
  Published    1996 
  Keywords    Ternary Pnictides, Alkaline Earth Metals, Palladium, Gold, Crystal Structure 
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 Identifier    ZNB-1996-51b-0905_n 
 Volume    51 
155Author    Z. NaturforschRequires cookie*
 Title      
 Abstract    Single crystals of Ba2M n(B30 6)2 (I) ar*d Ba2Co(B30 6)2 (II) were prepared by using a B20 , flux technique, Ba2Mn(B^O(l)2 in an argon atmosphere. X-ray investigations on single crystals of both compounds yield the space group C^-R3 (No. 148) with 3 formula units in the cell of dimensions (I) a = 711.01(4), c = 1694.90(3) pm and (II) a = 707.2(2), c = 1673.8(1) pm. The crystal structure is built by nearly planar (B ,0 6) " rings and contains one nine­ fold coordinated Barium site. Mn(I) and Co(II) are octahedrally coordinated by oxygen. The compounds are isotypic to B a ^ C a ^ O ^ . Die Synthese und Kristallstruktur von Ba2Mn(B306)2 und Ba2Co(B30 6)2 Synthesis and Crystal Structure of Ba2Mn(B30 6^ and Ba->Co(B30 6>, 
  Reference    Z. Naturforsch. 51b, 907 (1996) 
  Published    1996 
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 Identifier    ZNB-1996-51b-0907 
 Volume    51 
156Author    Utzolino, Karsten BluhmRequires cookie*
 Title    A nne  
 Abstract    The compounds M nCo(B20 ?) (I) and M nM g(B20 5) (II) were prepared by using B20 3 flux techniques in an argon atmosphere. X-ray investigations on single crystals showed triclinic symmetry, space group C' -P i, I: a = 320.94(10), b = 619.20(11), c = 939.0(2) pm, a = 104.38(2)°, ß = 90.76(2)°, 7 = 92.046(14)° and II: a = 318.97(7), b = 619.8(2), c = 936.7(2) pm, q = 104.47(2)°, ß = 90.60(2)°, 7 = 91.98(2)° Z = 2. Their structures are isotypic with C o2(B20 5). All metal ions are octahedrally coordinated by six oxygen atoms. The structures contain diborate anions B ^ 4 -. Each boron atom is threefold coordinated by oxygen. Synthese und Kristallstruktur von manganhaltigen Pyroboraten: MnCo(B20 5) und MnMg(B20 5) 
  Reference    Z. Naturforsch. 51b, 912—916 (1996); eingegangen am 25. Januar 1996 
  Published    1996 
  Keywords    Manganese, Cobalt Magnesium, Pyroborate Crystal Structure, X-Ray 
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 Identifier    ZNB-1996-51b-0912 
 Volume    51 
157Author    D. Trinschek, M. JansenRequires cookie*
 Title    Eine neue M odifikation von Na2 Zn2 0 3 A New M odification o f N a2Z n20 3  
 Abstract    A new modification of Na2Zn20 3 has been synthesized via solid state reaction. According to the single crystal structure determination, the compound crystallizes in the space group P432|2 (No. 96) with lattice parameters a = 6.1812(2), c = 9.4479(4) A, Z = 4. The structure consists of Z n 0 4 tetrahedra connected via edges and corners forming a threedimensional network. The structure can be described as an distorted anti spinel. 
  Reference    Z. Naturforsch. 51b, 917—921 (1996); eingegangen am 24. November 1995 
  Published    1996 
  Keywords    Sodium Zincates, Crystal Structure, Anti Spinei Type 
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 Identifier    ZNB-1996-51b-0917 
 Volume    51 
158Author    O. Laf Walter, G. Ottfried Hüttner, R. Ainer KernRequires cookie*
 Title    D a r s  
 Abstract    t e llu n g u n d C h a r a k t e r is ie r u n g v o n N (C H 2P P h 2)3, N (C H 2P P h 2)3M o (C O)3 u n d [ H N (C H 2P P h 2)3M o (C Ö) 3 ] B F 4 Preparation and Characterisation o f N (C H 2PPh-,)3, N (C H 2P P h i)3M o(C O)3 and [H N (CH 2PPh2)3M o(C O)3]BF4 The synthesis of N(CH2PPh2)3 (1) and its spectroscopic properties are reported. Reaction of N(CH2PPh2)3 with (CH3CN)3M o(CO)3 leads to N(CH 2PPh2)3M o(CO)3 (2). The cationic complex [HN(CH2PPh2)3Mo(CO)3]+ (3) is obtained by protonating the N atom of 2 with aqueous HBF4. The spectroscopic and structural properties of 2 and the cation 3 are compared. The results indicate an interaction of the ligand N atom and the Mo atom through space over more than 350 pm. It is shown from IR data that 2 
  Reference    Z. Naturforsch. 51b, 922—928 (1996); eingegangen am 18. Januar 1996 
  Published    1996 
  Keywords    Tripod Ligands, Phosphorus Ligands, Molybdenum Complexes, Crystal Structure 
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 Identifier    ZNB-1996-51b-0922 
 Volume    51 
159Author    C. W. Adewitz, HkM. Üller-BuschbaumRequires cookie*
 Title    Synthese und Struktur eines Strontium -V anadyl-Phosphats: Sr2( V 0 ) (P 0 4)2 Synthesis and Structure o f a Strontium Vanadyl Phosphate: Sr2(V 0 )(P 0 4)2  
 Abstract    Dark green single crystals of Sr2(VO)P2Ox have been prepared by solid state reactions in closed quartz tubes. X-ray investigations led to monoclinic symmetry, space group C2h-I2/c/, a = 6.744(4), b = 15.866(4), c = 7.032(2) Ä, ß = 115.41(2), Z = 4. Sr2(VO)P2O s is isotypic to Sr2(VO)V2Os and shows V4+ in split positions. The split positions are in non-centric octahedral coordination forming a short vanadium to oxygen distance typical for the vanadyl group. The crystal chemistry of the monovanadyl orthophate Sr2(VO)P2O x is discussed considering related divanadyl phosphates. 
  Reference    Z. Naturforsch. 51b, 929—933 (1996); eingegangen am 17. Januar 1996 
  Published    1996 
  Keywords    Strontium, Vanadium, Phosphorus, Oxygen, Crystal Structure 
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 Identifier    ZNB-1996-51b-0929 
 Volume    51 
160Author    Stephan Pitter, EckhardD. Injus, Beate Jung, H. Elm, Ar GörlsRequires cookie*
 Title    Phosphinoalkylnitrile: Synthese und Koordinationsverhalten an Palladiumzentren Phosphinoalkylnitnles: Synthesis and Coordination Behaviour at Palladium C entres  
 Abstract    Phosphinoalkylnitriles R2P-(CH2)"-CN {R = isopropyl ('pr), phenyl (ph), cyclohexyl (' hex), n -3, 6, 10} have been prepared starting from the corresponding secondary phosphines in an easy three step synthesis. All new compounds were characterized by their 'H -, i3C and 31P NMR data. Some of these new P, N ligands were used to prepare complexes [{R2P-(CH2)"-CN}2PdCl2] which were also identified by their NMR data. In addition the crystal structures of three derivatives, [{'pr2P-(CH2)3-CN }2PdCl2] 7a, [{ph2P-(CH2)3-CN }2PdCl2) 7b and [{ph2P-(CH 2)6-CN}2PdCl2] 8b were determined by X-ray analysis. The coordination mode of the phosphinoalkylnitriles in these complexes was found to be P-bonded resulting in a trans configuration. Palladium catalysts with 5a as ligand show high activies in the co-oligomerization of butadiene and carbon dioxide. The ^-lactone 11a is formed under very mild conditions. 
  Reference    Z. Naturforsch. 51b, 934—946 (1996); eingegangen am 11. Juli 1995 
  Published    1996 
  Keywords    Phosphinoalkylnitriles, Phosphine Complexes of Palladium, Crystal Structure, Catalysis, -Lactones 
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 TEI-XML for    default:Reihe_B/51/ZNB-1996-51b-0934.pdf 
 Identifier    ZNB-1996-51b-0934 
 Volume    51 
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