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1988 (283)
81Author    W. S. Hamama, M. Hammouda, E. M. AfsahRequires cookie*
 Title    Mannich Reaction with 5,5-Dimethyl-3-phenylamino-2-cyclohexen-l-one  
 Abstract    Mannich Bases of Enaminones, Octahydro-9H-pyrimido[5,4-b]-azepines, Tetrahydro-4H-[3,l]benzoxazin-5(6H)-one, Nitrogen Heterocycles 
  Reference    Z. Naturforsch. 43b, 483—486 (1988); received August 18 1986/October 26 1987 
  Published    1988 
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 Identifier    ZNB-1988-43b-0483 
 Volume    43 
82Author    Hans-Albert Brune, Reinhard Hemmer, Josef Unsin, Konrad Holl, Ulf ThewaltRequires cookie*
 Title    Molekülstruktur von {[P(C 6 H 5 ) 3 ] 2 RhOH} 2 -2 C 6 H 6 The Molecular Structure of {[P(C 6 H 5 ) 3 ] 2 RhOH} 2 -2 C 6 H 6  
 Abstract    The dinuclear Rhodium(I) complex Bis(/<-hydroxo)bis(bistriphenylphosphane-rhodium) forms during the HRh(PPh3)2 catalyzed hydrogenation of Schiff bases by isopropanol. It can be isolated from benzene solution as a crystalline solvate of composition {[P(C6H5)3]2RhOH}2-2 C6H6 (1). The complex contains a four-membered ring with bridging hydroxo groups. Crystals of 1 are triclinic, space group PI with a = 12.570(3), b = 12.850(4), c = 13.982(3) Ä, a = 116.23(3), ß = 115.08(3), y = 90.89(3)°, and Z = 1. 
  Reference    Z. Naturforsch. 43b, 487—490 (1988); eingegangen am 3. Dezember 1987 
  Published    1988 
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 Identifier    ZNB-1988-43b-0487 
 Volume    43 
83Author    AdrianaL. Brachet-Cota, Gerardo BurtonRequires cookie*
 Title    Mercuric Oxide-Iodine Oxidation of 6/^-Hydroxypregnanes. Influence of the C-5 Functionality  
 Abstract    Oxidation of 6/3-hydroxyprogesterone and 3/3-acetoxy-5a,6/3-dihydroxypregnan-20-one with mercuric oxide-iodine under photolytic conditions rendered 4a-iodo-5/3,6/3-oxidopregnan-3,20-dione and 3/3-acetoxy-7-iodo-19-formyloxy-5,7-seco-6-norpregnan-5,20-dione respectively. 
  Reference    Z. Naturforsch. 43b, 491—495 (1988); received November 2 1987 
  Published    1988 
  Keywords    6/3-Hydroxypregnanes, Mercuric Oxide, Oxidation, /3-Fragmentation Hypoiodite Reaction 
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 Identifier    ZNB-1988-43b-0491 
 Volume    43 
84Author    Christoph KratkyRequires cookie*
 Title      
 Abstract    The crystal structure of Rb2Ca(N3)4-4H20 has been determined by single crystal X-ray methods. The compound is isotypic with K2Ca(N3)4-4H20 and crystallizes in the orthorhombic space group Ccca, Z = 4, a = 1949.1(12) pm, b = 1099.5(3) pm, c — 622.2(1) pm. 
  Reference    Z. Naturforsch. 43b, 497—498 (1988); eingegangen am 23. November 1987/14. Januar 1988 
  Published    1988 
  Keywords    Azide, Calcium, Crystal Structure, Hydrate, Rubidium 
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 Identifier    ZNB-1988-43b-0497_n 
 Volume    43 
85Author    Eva Ehrenstorfer-Schäfers, Helmut Hartl, Wolfgang BeckRequires cookie*
 Title    Bildung wasserlöslicher Histidin-Platin- Komplexe aus metallischem Platin und Histidin Formation of Water Soluble Histidine Platinum Complexes from Metallic Platinum and Histidine  
 Abstract    Metallic Platinum and Histidine Metallic Platinum dissolves under oxygen atmos-phere in aqueous histidine solution. About 0.1 to 0.3 /<mol of a water soluble histidine platinum complex per ml solution have been found by atomic absorption spectroscopy. Von den eingesetzten a-Aminosäuren und Pepti-den entsteht mit Histidin eine gelbe Lösung, die bei fünf verschiedenen Proben (im pH-Bereich 7—10) 20—70 wg Pt pro ml Lösung enthielt. Mit L-His-Gly und L-His-L-Ala wurden etwas geringere Pt-Kon-zentrationen festgestellt. Mit allen anderen Amino-säuren lag die gemessene Pt-Konzentration nicht we-sentlich über dem Blindwert. Ähnliche Konzentrationen an löslichen Goldver-bindungen wurden unter ähnlichen Bedingungen mit metallischem Gold und schwefelhaltigen a-Amino-säuren festgestellt. Es ist bekannt, daß Gold(I) be-sonders stabile Komplexe mit schwefelhaltigen Li-ganden bildet. Von Volshtein et al. wurden verschiedene Platin-(II)-Komplexe mit Histidin als ein-oder zweizähni-gem Ligand beschrieben [3, 4]. Vermutlich bildet sich bei unseren Versuchen ein kationischer Chelat-komplex. 
  Reference    Z. Naturforsch. 43b, 499—500 (1988); eingegangen am 12. Oktober 1987 
  Published    1988 
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 Identifier    ZNB-1988-43b-0499_n 
 Volume    43 
86Author    H. Nöth, H. Pommerening, R. StaudiglRequires cookie*
 Title    Beiträge zur Chemie des Bors, 189 [1] Die Kristall-und Molekülstruktur von Bis(l,3-dithiaborolan-2-yl)suIfid Contributions to the Chemistry of Boron, 189 [1] The Crystal and Molecular Structure of Bis(l,3-dithiaborolan-2-yl)sulfide  
 Abstract    Bis(l,3-dithiaborolan-2-yl)sulfide, X-Ray Structure The structure of the title compound has been determined by X-ray diffraction. The molecule has C: symmetry, containing two dithiaborolanyl groups in twist conformation. The normals of the two BS3 planes of the molecules form an angle of only 17,6°. All BS bonds can be considered to be single bonds. 
  Reference    Z. Naturforsch. 43b, 501—504 (1988); eingegangen am 20. November 1987 
  Published    1988 
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 Identifier    ZNB-1988-43b-0501 
 Volume    43 
87Author    M. Veith, J. PöhlmannRequires cookie*
 Title    Nitrogen Compounds of Elements of the Third Main Group with Intra-and Intermolecular Donor Acceptor Bonds, V [1] Special Gallium and Indium Amides with Alkoxo Groups  
 Abstract    The lithium alkoxoamidosilane (Me2Si(O r Bu)(N r Bu)Li)2 (4) and its trimethyltin derivative Me2Si(0'Bu)(N'Bu)SnMe3 (7) have been used, to introduce the ligand Me2Si(0'Bu)(N'Bu) = L into molecular compounds of gallium and indium. The following molecules were synthesized: L—M(Me)Cl (M = Ga (5), In (6)), L-InMe2 (8), L-InX2 (X = Cl (9), Br (10)), L2InX (X = Cl (11), Br (12)) and L2Ga2Cl2 (22). The ligand L is assumed to chelate the metal atom on the basis of temperature dependent 'H NMR spectra. The chelating effect is more pronounced in the gallium derivatives than in the indium analogues. Equilibria between L2InX/InX, and LInX: have been observed in diethylether solutions. No metal(I) derivatives LGa or Lin could be isolated. L2Ga2Cl2 (22), formally containing gallium(ll), can be sublimed without decomposition at 110 °C in vacuo. 
  Reference    Z. Naturforsch. 43b, 505—512 (1988); eingegangen am 28. Dezember 1987 
  Published    1988 
  Keywords    Synthesis, Chelated Metal Atoms, Intramolecular Rearrangements, Equilibria Followed by 'H NMR 
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 Identifier    ZNB-1988-43b-0505 
 Volume    43 
88Author    G. González, C. Díaz, H. BinderRequires cookie*
 Title    ESCA Studies of N,N'-Thiobisamines and of Some of its Chromium Carbonyl Complexes  
 Abstract    The X-ray photoelectron spectra of some N,N'-thiobisamines and of two of its complexes with Cr(CO)5 have been studied. The S(2p) binding energies are found to correlate with the effective nuclear charge on the sulfur atom as well as with the double bond character of the S-N linkage. The effect of the coordination on the N(ls) and S(2p) binding energies agree with sulfur coordi-nation as well as with a jt acceptor behaviour characteristic for thiobisamine ligands. 
  Reference    Z. Naturforsch. 43b, 513—516 (1988); received September 17 1987 
  Published    1988 
  Keywords    ESCA Studies, NN'-Thiobisamines, Diaminosulfanes, Chromiumpentacarbonyl Complexes 
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 Identifier    ZNB-1988-43b-0513 
 Volume    43 
89Author    Frank Edelmann, Claudia Spang, HerbertW. Roesky, PeterG. JonesRequires cookie*
 Title    Synthese und Struktur des ersten dreigliedrigen Arsen—Phosphor—Platin-Ringes Synthesis and Structure of the First Three-Membered Ring Containing Arsenic, Phosphorus and Platinum  
 Abstract    -butylphenylphosphane reacts with CpFe(C,H4AsCl2) in the presence of DBU to yield CpFe[C5H4As=PC6H2(f-Bu)?l. The reaction of this arsaphosphene with (Ph3P)2PtC2H4 yields CpFe[C5H4As—P[C6H2(r-Bu)3]Pt(PPh3)2], a compound with a three-membered ring containing arsenic, phosphorus and platinum. 
  Reference    Z. Naturforsch. 43b, 517—520 (1988); eingegangen am 5. Januar 1988 
  Published    1988 
  Keywords    X-Ray, NMR Spectra, Phosphorus, Arsenic, Platinum 2, 4, 6-Tri 
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 Identifier    ZNB-1988-43b-0517 
 Volume    43 
90Author    Rupert MarxRequires cookie*
 Title    Darstellung und Kristallstruktur von Cäsiumhydroxid mit Methanol CsOH * CH 3 OH Properties and Crystal Structure of Cesium Hydroxide with Methanol CsOH * CH 3 OH  
 Abstract    Cesium hydroxide methanol, CsOHCH3OH, was obtained by recrystallising Cs0H H:0 in a mixture of liquid ammonia and methanol in sealed quartz ampoules. The colourless, air sensitive crystals are hexagonal (space group P63/m) with a = 1362 pm, c = 430 pm, Z = 6. A structural model derived by Patterson methods was refined to R = 0.033. The structure comprises of trigonal prismatic columns of Cs + and hydrogen bonded chains of OH^ and CH,OH along the c-axis. This leads to the tricapped prisms filled with Cs + and hydrophobic channels formed by the CH, groups. 
  Reference    Z. Naturforsch. 43b, 521—524 (1988); eingegangen am 14. Oktober/7. Dezember 1987 
  Published    1988 
  Keywords    Cesium Hydroxide Methanol, Synthesis, Crystal Structure 
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 Identifier    ZNB-1988-43b-0521 
 Volume    43 
91Author    Edmund Hartmann, Joachim SträhleRequires cookie*
 Title    Synthese und Kristallstruktur von [l,3-Bis(4-ethoxyphenyl)triazenido]pyridino-silber(I), einem dimeren Komplex mit kurzem Silber-Silber-Kontakt Synthesis and Crystal Structure of [l,3-Bis(4-ethoxyphenyl)triazenido]pyridino Silver(I), a Dimeric Complex with a Short Silver-Silver Contact  
  Reference    Z. Naturforsch. 43b, 525—528 (1988); eingegangen am 22. Dezember 1987 
  Published    1988 
  Keywords    Bis[l, 3-Bis(4-ethoxyphenyl)triazenido-pyridino Silver(I)], Synthesis, Crystal Structure 
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 Identifier    ZNB-1988-43b-0525 
 Volume    43 
92Author    Raimund Schmid, Johannes Beck, Joachim SträhleRequires cookie*
 Title    Synthese und Struktur von Cäsium-l,5-bis(/?-tolyI)pentaazadienid, Cs + (tolN 5 tol)~ Synthesis and Structure of Cesium l,5-Bis(/?-tolyl)pentaazadienide, Cs + (tolN 5 tol)  
 Abstract    Cesium l,5-Bis(tolyl)pentaazadienide, Synthesis, Crystal Structure Cs + (tolN,tol)" (1) is formed as a yellow crystalline precipitate after addition of a concentrated aqueous solution of CsCl to a concentrated solution of l,5-Bis(p-tolyl)pentaazadiene(l,4) in ammonia. 1 crystallizes in the orthorhombic space group Pccn with a = 3169(1), b = 434.3(2), c = 1109.4(7) pm, Z = 4. The structure contains (tolN5tol)~ anions and Cs + cations both occupying two-fold axes. The all-trans N5 zigzag chain is planar with localized double bonds Nl —N2 and N2' —N 1' of 127.7 pm and shortened single bonds N2-N3 and N3-N2' of 136.9 pm. The tolyl substituents are titled by 25.5° against the plane of the N atoms. Cs + is surrounded in a square antiprismatic arrangement by eight N atoms of four N5 chains with distances Cs—N in the range of 314.6 to 366.2 pm. 
  Reference    Z. Naturforsch. 43b, 529—532 (1988); eingegangen am 22. Dezember 1987 
  Published    1988 
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 Identifier    ZNB-1988-43b-0529 
 Volume    43 
93Author    Raimund Schmid, Joachim SträhleRequires cookie*
 Title    Synthese und Struktur  
 Abstract    von l,5-Bis(tolyl)pentaazadienidokomplexen von Eisen(II) und Ruthenium(I): [Fe(tolN 5 toI) 2 ] 2 und [Ru(CO) 3 (toIN 5 tol)] 2 Synthesis and Structure of l,5-Bis(tolyl)pentaazadienido Complexes of Iron(II) and Ruthenium(I): [Fe(tolN 5 tol) 2 ] 2 and [Ru(CO) 3 (tolN 5 tol)] 2 l,5-Bis(tolyl)pentaazadienido Iron(II), l,5-Bis(tolyl)pentaazadienido Ruthenium(I) Tricarbonyl, Synthesis, Crystal Structure 
  Reference    Z. Naturforsch. 43b, 533—539 (1988); eingegangen am 20. Januar 1988 
  Published    1988 
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 Identifier    ZNB-1988-43b-0533 
 Volume    43 
94Author    Martin Spohn, Joachim SträhleRequires cookie*
 Title    Benzoatokomplexe des Eisens und Cobalts Synthese und Eigenschaften von Fe 3 (C 6 H 5 COO)4(acac)2, Fe(C 6 H 5 COO) 2  
 Abstract    CO(C 6 H 5 COO) 2 , Kristallstruktur von Fe 3 (C 6 H 5 COO)4(acac)2 und Co(C 6 H 5 COO) 2 Benzoato Complexes of Iron and Cobalt Synthesis and Properties of Fe 3 (C 6 H 5 COO) 4 (acac) 2 , Fe(C 6 H 5 COO) 2 and Co(C 6 H 5 COO) 2 , Crystal Structure of Fe 3 (C 6 H 5 COO) 4 (acac) 2 and Co(C 6 H 5 COO) 2 The reaction of iron(III) acetylacetonate with molten benzoic acid yields Fe(C 6 H 5 COO) 2 (2) besides small amounts of Fe 3 (Q,HsCOO) 4 (acac) 2 (1), whereas cobalt(III) acetylacetonate or cobalt(II) carbonate quantitatively yield Co(C h H 5 COO) 2 (3). Complex 1 forms triclinic red crys-tals with the space group PI and the lattice constants a — 1016.0(3) pm. b = 1099.9(2) pm. c -969.8(2) pm, a = 92.68(2)°, ß = 105.67(2)°, y = 117.57(2)°, Z = 1. 3 is obtained as monoclinic violet needles with the space group C2/c and the lattice constants a — 1739.2(4) pm, b = 1413.8(3) pm, c = 1045.3(3) pm,/3 = 96.26(2)°, Z = 8. 3 consists of polymeric chains with a zigzag arrangement of the cobalt atoms (Co —Co — 314.5 pm) and an octahedral coordination for Col and (4+2)-coordination for Co2. The benzoato ligands act differently. One benzoate group functions as bridging ligand between adjacent metal atoms, the other acts as a four-dentate ligand by chelating one cobalt atom and bridging its neighbours. Complex 2 was not obtained in form of single crystals, but its properties as well as its IR and Mößbauer spectra suggest a similar structure as for 3. Complex 1 is also polymeric, the chain of iron atoms is nearly linear. The acetylacetonate ligand acts chelating and bridging as a four-dentate ligand, whereas the benzoate anion is only bridging neighbouring Fe atoms. The Fe atoms exhibit octahedral and trigonal bipyramidal co-ordination. 
  Reference    Z. Naturforsch. 43b, 540—546 (1988); eingegangen am 20. Januar 1988 
  Published    1988 
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 Identifier    ZNB-1988-43b-0540 
 Volume    43 
95Author    Gert Heller, Karlheinz SeegerRequires cookie*
 Title    Gemischte Borsäureester von Aminoalkoholen und Diolen Mixed Esters of Borie Acid with Amino Alcohols and Diols  
 Abstract    Mixed Boric Esters, 2-Aminoorganyloxy-l,3-dioxa-2-boracyclopentanes, 2-Aminoorganyloxy-5,5-dimethyl-1,3-dioxa-2-boracyclohexanes. Boron-Nitrogen Coordination B(OC 2 H 5) 3 reacts with diols to give 2-ethoxy-l,3-dioxa-2-boracycloalkanes (1—4) which, on aceotropic distillation in toluene with amino alcohols, give mixed boric acid esters of the type OZOBOYNR,R 2 (5—8, a—g). The structures of these compounds are discussed on the basis of IR and Raman spectra and MS, 'H, and "B NMR data, and with reference to an X-ray investiga-tion published previously. z n B-0-C?H, + HO-Y-N^R, —* Z B Y + C,H,0H / 2 b 12 \ / / 25 1-4 5 -8 (a -g) The presence of a boron <— nitrogen coordination is proposed in all cases. 
  Reference    Z. Naturforsch. 43b, 547—556 (1988); eingegangen am 28. Dezember 1987 
  Published    1988 
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 Identifier    ZNB-1988-43b-0547 
 Volume    43 
96Author    Walter Abriel, Hartmut EhrhardtRequires cookie*
 Title    Über hexakoordinierte gemischte Halogeno-Anionen des Te(IV): Kristallographische und Raman-spektroskopische Untersuchungen an Rb 2 TeBr 3 , 5 Cl 2 , 5 On Hexacoordinated Mixed Halogeno Anions of Te(IV): Crystallographic and Raman Spectroscopic Investigation of Rb 2 TeBr 3 5 C1 2 5  
 Abstract    The title compound contains the anions [TeBr 3 Cl 3 ] 2_ and [TeBr 4 Cl 2 ] 2_ in a 1:1 ratio. The corresponding point symmetries, detected by Raman spectroscopic methods, are 3 m and 4/mmm, respectively. The crystal structure analysis exhibits a random distribution of these anions: K 2 PtCl 6 -type, space group Fm3m with a = 10.4602(5) Ä and Z = 4, final R = 0.036 from 178 F n (MoKa). Einführung 
  Reference    Z. Naturforsch. 43b, 557—560 (1988); eingegangen am 7. Januar 1988 
  Published    1988 
  Keywords    Tellurates, Crystal Structure, Raman Spectra 
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 Identifier    ZNB-1988-43b-0557 
 Volume    43 
97Author    Gerhard Fritz, Hans-Werner Schneider, Wolfgang Hönle, Hans Georg, SchneringRequires cookie*
 Title    Zur Chemie und Strukturchemie von Phosphiden und Polyphosphiden, 49 [1] Bildung und Struktur des Henicosaphosphids [Li(12-Krone-4) 2 ]3P2i(THF) 2 Chemistry and Structural Chemistry of Phosphides and Polyphosphides, 49 [1] Formation and Structure of the Henicosaphosphide [Li(12-Crown-4) 2 ] 3 P 21 (THF) 2  
 Abstract    The reaction of Li 3 P 7 (DME) 3 with crown ether 12-crown-4 and (CHT)Cr(CO) 3 yields a reddish oil, from which red crystals of [Li(12-crown-4) 2 ] 3 P 21 (THF) 2 (1), red crystals of Li 2 P 16 (12-crown-4) x (THF) 2 as well as a not yet identified yellow substance separates. From this mixture crystals of 1 could be isolated. [Li(12-crown-4),] 3 P,,(THF), (1) crystallizes in the space group P2,/a with a = 3021.1(6) pm, b = 1901.5(4) pm, c = 1603.0(4) pm, ß = 95.98(3)° and Z = 4 formula units in the unit cell. The structure is characterized by isolated ^[P 2 I 3 ~] trianions and Li(12-crown-4) 2 cations. The trianion has approximately the symmetry mm2. The bond distances d(P-P) range from 213.9 pm to 226.8 pm and are differentiated by their function in the skeleton. The bond angles /3(P-P-P) are in the range 86.1° to 107.7° and image clearly the influence of the repulsion of the non-bonded electron pairs of the strained anion. The curvature of the trianion is approx. 0.8 nm" 1 and is three times larger than the curvature evaluated from structural models. 
  Reference    Z. Naturforsch. 43b, 561—566 (1988); eingegangen am 15. Januar 1988 
  Published    1988 
  Keywords    Henicosaphosphide Anion Crystal Structure, Molecular and Polymer Trianion, Heptaphospha-Nortricyclene, Heptaphospha-Norbornane 
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 Identifier    ZNB-1988-43b-0561 
 Volume    43 
98Author    Peter Hoffmann, Franz-Josef Hermes, Rainer MattesRequires cookie*
 Title    Komplexe des l-Thia-4,7-diazacyclononans (L) mit Blei(II), Indium(III), Thallium(I) und (III) Kristallstruktur von [LPb][PbBr 4 ] Complexes of l-Thia-4,7-diazacyclononane (L) with Lead(II), Indium(III), Thallium(I) and (III) Crystal Structure of [LPb][PbBr 4 ]  
 Abstract    The reaction of l-thia-4,7-diazacyclononane (C 6 H 14 N 2 S = L) with salts containing T1(I) and (III), In(III) and Pb(II) ions yields 1:1 complexes, which can be crystallized as halide or Perchlo-rate salts. The structure of [LPb][PbBr 4 ] (5) has been determined: Crystal data: orthorhombic, space group P2,2,2,, a = 853.2(6), b = 1000.1(4), c = 1860(1) pm, Z = 4. Pb 2+ in the [LPb] 2+ cation is seven-coordinated by the tridentate ligand and a square of four Br" ions. The Pb—S distance, 286.0(5) pm, is rather short, the lone pair stereochemically activ. The PbBr 4 " ions are polymeric with octahedrally coordinated lead(II) atoms. 
  Reference    Z. Naturforsch. 43b, 567—570 (1988); eingegangen am 8. Februar 1988 
  Published    1988 
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 Identifier    ZNB-1988-43b-0567 
 Volume    43 
99Author    Hubert Schmidbaur, Rudolf HagerRequires cookie*
 Title    ,1-Disilylethan, CH 3 CH(SiH 3 ) 2 1,1-Disilylethane, CH 3 CH(SiH 3 ) 2  
 Abstract    1,1-Disilylethane, Silanes, Silaalkanes l,l-Bis(trichlorosilyl)ethane, CH 3 CH(SiCl 3) 2 (1) is readily available through catalytic hydro-silylation of vinyltrichlorosilane and silicochloroform (90% yield), or through the base-induced reduction of acetyl chloride using again silicochloroform (60%). 1 can be converted into the title compound 2 in 80% yield by lithium aluminium hydride in di-«-butylether. Compound 2 is a highly volatile liquid (bp. 40—42 °C), not spontaneously inflamable in air. which is of inter-est as a precursor for chemical vapour deposition of hydrogen-containing silicon/carbon alloys (a-Si, C:H) and silicon carbide. Based on thermodynamical data, it is the least stable isomer of the composition C 2 Si 2 H 10 . 
  Reference    Z. Naturforsch. 43b, 571—573 (1988); eingegangen am 29. Januar 1988 
  Published    1988 
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 Identifier    ZNB-1988-43b-0571 
 Volume    43 
100Author    K. Bütje, W. PreetzRequires cookie*
 Title    Bindungsisomere Hexakis(selenocyanato(N)-selenocyanato(Se))-Osmate(III)  
 Abstract    , [Os(NCSe) n (SeCN) 6 _ n ] 3 ~, n = 0-3 Bond Isomeric Hexakis(selenocyanato(N)-selenocyanato(Se)) Osmates(III), [Os(NCSe)"(SeCN) 6 _"] 3_ , n = 0-3 Bond Isomeric Hexakis(selenocyanato(N)-selenocyanato(Se)) Osmates(III). Geometrie Isomers. Raman Spectra. IR Spectra, UV Spectra Six of ten possible linkage and geometric isomers of the formula [Os(NCSe)"(SeCN) 6 _"] 3 ", n = 0—3, have been obtained. The n = 0—2 complexes are prepared from the reactions of K2[OSX6], X = Br, I, and of K : [0s0 2 (0H) 4 ] in presence of ascorbic acid, with excess aqueous or methanolic KSeCN solutions at 20—40 °C. By heating the solid tetrabutylammonium salts, N-bonding of the ambident SeCN is favoured, and the n — 3 species are formed. The complexes are separated by ion exchange chromatography and characterized by vibrational and electronic spectra. Characteristic group frequencies are: v 0sSe : 183 — 216, v 0sN : 224—246, v CSe(Se) : 508-528, vCse(N>: 665-680, v CN : 2081-2122 cm" 1 . 
  Reference    Z. Naturforsch. 43b, 574—580 (1988); eingegangen am 3. Februar 1988 
  Published    1988 
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 Identifier    ZNB-1988-43b-0574 
 Volume    43 
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