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61	Author	Z. Naturforsch	Requires cookie*
	Title	Synthese und Dimerisierungsverhalten des l,l-Bis(trimethylsilyl)-2-(2,5-diisopropylphenyl)silens
	Abstract	Tris(trim ethylsilyl)silylmagnesium bromide, (Me^SiX^SiMgBr, reacts with 2.5-diisopropyl-benzaldehyde to give 2,5-diisopropylphenyl-tris(trimethylsilyl)silylmethanol (1). With sodium
	Reference	Z. Naturforsch. 51b, 370—3 (1996); eingegangen am 21. August 1995
	Published	1996
	Keywords	Silenes, Silene Dimerization, 2, 3-Disilanaphthalenes Tetrahydro, 1, 2-Disilacyclobutanes
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	TEI-XML for	default:Reihe_B/51/ZNB-1996-51b-0370.pdf
	Identifier	ZNB-1996-51b-0370
	Volume	51

62	Author	G. Em Ot, F. Renkingb, A. Nton, R. Ieker2, Josef Salbeck0, BerndS. Peiser1	Requires cookie*
	Title	2,5,8,11-Tetra-terMmtyl-pen-xanthenoxanthene and its Dication Spectroelectrochemistry and Model Calculations on a Dioxa-22-7r-system
	Abstract	Spectroelectrochemistry of 2,5,8,1 l-tetra-rm-butyl-p^n'-xanthenoxanthene 1 yields the UV/VIS spectra of the corresponding radical cation l '+ and dication 12+. The bathochromic shift for the dication 12+ relative to 1 and to the isoelectronic hydrocarbon anthanthrene (2) can be understood by quantum mechanical calculations {ab initio, AM 1) of model structures.
	Reference	Z. Naturforsch. 51b, 377—380 (1996); received October 4 1995
	Published	1996
	Keywords	Spectroelectrochemistry, MO-Calculations, Xanthenoxanthenes, Radical Cation, Dication
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	TEI-XML for	default:Reihe_B/51/ZNB-1996-51b-0377.pdf
	Identifier	ZNB-1996-51b-0377
	Volume	51

63	Author	G. Erhard, H. Enesa, A. Nton Rieker, M. Arkus, N. Eum Ayerb, W. Olfgang Hiller	Requires cookie*
	Title	,4-Addition of Lithium Organyls to /?ara-Quinols / Structure Determination of 2,6-Di-te/t-butyl-4-hydroxy-4,5-diphenyIcyclohex-2-en-l-one
	Abstract	Addition of lithium organyls to sterically hindered para-quinols leads to 1,2-or 1,4-adducts. The 1,4-addition prevails, if the 4-substituents in the quinol and the organic group in the lithium organyl are large. Four 1,4-addition products (2-cyclohex-2-en-l-ones) are synthesized and their structures investigated by NMR spectroscopy. The aryl groups at C-4 and C-5 acquire equatorial positions, the alkyl group at C-6 is bisectional. These results are confirmed by X-ray analysis of 2,6-di-terr-butyl-4-hydroxy-4,5-diphenylcyclohex-2-en-1 -one, revealing a twist boat conformation of the cyclohexene ring.
	Reference	Z. Naturforsch. 51b, 381—387 (1996); received August 11 1995
	Published	1996
	Keywords	Crystal Structure, Quinol, 1, 4-Addition, Lithium Organyl, Cyclohex-2-en-l-ones
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	TEI-XML for	default:Reihe_B/51/ZNB-1996-51b-0381.pdf
	Identifier	ZNB-1996-51b-0381
	Volume	51

64	Author	BernhardG. Ollasa, S. Bernd, Peiser1, H. Artm, Ut Stahp, Jürgen Sieglenb, Joachim Strähleb	Requires cookie*
	Title	Electrochemistry of Oxygenation Catalysts, Part 6* Electrosynthesis, Structure, Analytical and Electrochemical Properties of Monomeric [Coin(salen)(DMF)2]+ X' Salts (X = PF6, C104)
	Abstract	Electrochemistry [CoH1(salen)(DMF)2]+ X" salts [X = PF6, C104; salen = bis(salicyliden)ethylendiiminato; DMF = dimethylformamide] have been synthesized by electrochemical and chemical (air) oxidation of Co"(salen). Their monomeric structure with two DMF molecules in the axial positions in both the solid state and DMF solution is shown by X-ray crystal structure analysis, thermal analysis, mass spectroscopy, and 'H and l3C NMR spectroscopy. The electrochemical reduction of the [Coni(salen)(DMF)2]+ cation is investigated by cyclic voltammetry and com pared to the oxidation of the neutral CoH(salen). The redox reaction connecting the cobalt(II) and the cobalt(III) species appears to be a quasi-reversible electron transfer. These properties make the [Co1 1 (salen)(DMF)2]+ X-salts starting materials for the analysis of the interaction of basic substrates with cobalt(III) species in the context of the biomimetic oxygenation reactions catalyzed by such complexes.
	Reference	Z. Naturforsch. 51b, 388—398 (1996); received September 4. 1995
	Published	1996
	Keywords	Cobalt Complexes, Oxygenation Catalysts, Crystal Structure, Solution Structure
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	TEI-XML for	default:Reihe_B/51/ZNB-1996-51b-0388.pdf
	Identifier	ZNB-1996-51b-0388
	Volume	51

65	Author	Eva-M Struckb, Karl Aria Peters0, H. Petersc, Georg Ans, Von Schneringc	Requires cookie*
	Title	Verknüpfung koordinativ ungesättigter Kupfer(II)-Monomere via Cyano-versus Tetrazolyl-Donor [1]
	Abstract	Reaction of a methanolic copper(II) acetate solution with tetrazolyl enol derivatives 2a (HL2) or 2b (HL3) leads to the formation of the corresponding 2D-coordination polymers 4 (^ [CuL^]) and 5 (^ [CuL2]), respectively. Single-crystal X-ray diffraction of the supramolecular species 4 and 5 established unequivocally the structures of the regioisomeric coordination polymers. On the contrary, reactions of 2c (HL4) with methanolic copper(II) acetate solution and 2b (HL3) with methanolic zinc(II) acetate solution yield mononuclear chelate complexes 11 ([CuL2]) and 12 ([ZnL2(MeOH)2]). The structures of 11 and 12 have been established by X-ray structure analysis.
	Reference	Z. Naturforsch. 51b, 399—408 (1996); eingegangen am 14. August 1995
	Published	1996
	Keywords	Tetrazolyl Enols, Coordination Polymers 2D Copper Complexes, Spontaneous Self-Assembly, X-Ray
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	TEI-XML for	default:Reihe_B/51/ZNB-1996-51b-0399.pdf
	Identifier	ZNB-1996-51b-0399
	Volume	51

66	Author	H. Ans-D, Ietrich Stachel, Jo Sef Schachtner111, Josef Seidel121	Requires cookie*
	Title	Reduktion cyclischer Maleinsäurederivate Reduction o f C yclic M aleic Acid Derivatives
	Abstract	A series of potentially cytotoxic a,/?-unsaturated 7 -hydroxy-butyrolactones, -lactams and -thiolactones has been synthesized via regioselective hydride reduction of the appropriate maleic acid anhydrides, imides and thioanhydrides. By this means a straightforward access to naturally occurring antibiotic narthigenine 2, its hitherto unknown thio-analogue 5b and higher substituted derivatives and analogues of 2 is presented.
	Reference	Z. Naturforsch. 51b, 409—416 (1996); eingegangen am 28. Juni 1995
	Published	1996
	Keywords	Reduction, Narthigenine, Butyrolactones, Butyrolactams, Tetramic Acids
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	TEI-XML for	default:Reihe_B/51/ZNB-1996-51b-0409.pdf
	Identifier	ZNB-1996-51b-0409
	Volume	51

67	Author	Electrochem Ical, D. Ehalogenation, F. Endosulfane, J. G. Assm Anna, J. Voss3 ', G. A. Diw Idjajab	Requires cookie*
	Title	Electroreduction of Organic Compounds, 27 [1]
	Abstract	Chlorinated Insecticides, Electrochemical Reduction, Endosulfane, Dechlorination, X-Ray (R) Partial dechlorination takes place if Endosulfane is electrolysed in methanol solution at lead cathodes. The products are detected and identified by GC/MS, IR and NMR spectroscopy. The structure of the product 2 is confirmed by an X-ray structural analysis.
	Reference	Z. Naturforsch. 51b, 417—420 (1996); received September 4 1995
	Published	1996
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	TEI-XML for	default:Reihe_B/51/ZNB-1996-51b-0417.pdf
	Identifier	ZNB-1996-51b-0417
	Volume	51

68	Author	H. Möhrle, U. Von Der Lieck-Waldheim	Requires cookie*
	Title	Vinamidinium-Salze als Nucleophile Vinamidinium Salts as N ucleophiles
	Abstract	1,4-diazepinium salts could not be aminomethylated with conventional methods, but the hydrochlorides produced with methyleniminium salts the C-Mannich-compounds. The reactivity of the substrate was mainly controlled by electronic effects of the substituents. Aminomethylation of 1,5-diazapentadienium salts occurred only if the conformations caused no steric hindrance of the ß-C-atom. Methyl substituted 2,3-dihydro-1,4-diazepinium salts reacted with 1,3,5 triazine to pyrimidine anellated derivatives.
	Reference	Z. Naturforsch. 51b, 421—430 (1996); eingegangen am 4. Juli 1995
	Published	1996
	Keywords	Mannich Reaction, Iminium Salts, 1, 3, 5 Triazine, Push-Pull-Systems 2, 3-Dihydro-
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	TEI-XML for	default:Reihe_B/51/ZNB-1996-51b-0421.pdf
	Identifier	ZNB-1996-51b-0421
	Volume	51

69	Author	Karl Peters3, Eva-M Aria Peters3, G.Erhard Bringmannb, O. La, F. Schuppb	Requires cookie*
	Title	l,3-Dimethoxy-677- benzo[b]naphtho[l,2-d]pyran-6-thione, a Thionolactone-Bridged Axially Prostereogenic Biaryl
	Abstract	The title compound was prepared from the cor responding " ordinary" oxolactone bridged biaryl using Lawesson's reagent. It crystallizes from di-chloromethane / petroleum ether in the mono clinic system, space group P2xla; a = 1115.7(2),
	Reference	Z. Naturforsch. 51b, 431—432 (1996); received September 9 1995
	Published	1996
	Keywords	Crystal Structure, Stereochemistry, Biaryl Coupling
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	TEI-XML for	default:Reihe_B/51/ZNB-1996-51b-0431_n.pdf
	Identifier	ZNB-1996-51b-0431_n
	Volume	51

70	Author	Hans-Joachim Mai, Bernhard Neumüller, Kurt Dehnicke	Requires cookie*
	Title	[M n (/ t-B u )(N PE t3) ] 4, an Organomanganese Com pound with Heterocubane Structure
	Abstract	O rganom anganese Com pound, Synthesis, Crystal Structure [M n (« -B u)(N P E t 3) ] 4 has been prepared by the reaction o f [M n B r(N P E t3) ] 4 with «-butyllithium in b oilin g pentane. The pyrophoric compound form s red, moisture sensitive crystals, which were characterized by IR spectroscopy and by a crystal structure determ ination (tetragonal, space group I4j/a, Z = 4, structure solution with 699 observed unique reflections, R = 0.054. Lattice dimensions
	Reference	Z. Naturforsch. 51b, 433—436 (1996); eingegangen am 19. Septem ber 1995
	Published	1996
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	TEI-XML for	default:Reihe_B/51/ZNB-1996-51b-0433_n.pdf
	Identifier	ZNB-1996-51b-0433_n
	Volume	51

71	Author		Requires cookie*
	Title
	Reference	Z. Naturforsch. 51b, 437 (1996)
	Published	1996
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	TEI-XML for	default:Reihe_B/51/ZNB-1996-51b-0437_n.pdf
	Identifier	ZNB-1996-51b-0437_n
	Volume	51

72	Author	Danita De, W. Aal, M. Anfred Zabel, Klaus-Jürgen	Requires cookie*
	Title	The Crystal Structure o f /?-CsI04, the Room-Temperature Modification o f Cesium Periodate
	Abstract	The crystal structure of /?-CsI04, the room-tem-perature modification o f cesium periodate, was determined as orthorhombic, space group Pnma, with a = 5.8644(5), b = 6.0326(4), c = 14.379(1) A and Z = 4. The structure was refined to = 0.0309, wR2 = 0.0701 for 425 absorption-corrected reflections. /?-CsI04 is isostructural with yS-CsRe04. The structure comprises isolated I 0 4 tetrahedra, linked together by Cs ions. The average 1-0 dis tance was found to be 1.747 A .
	Reference	Z. Naturforsch. 51b, 441—443 (1996); received July 17 1995
	Published	1996
	Keywords	Cesium Periodate, Room-Temperature Modifica tion, Crystal Structure
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	TEI-XML for	default:Reihe_B/51/ZNB-1996-51b-0441_n.pdf
	Identifier	ZNB-1996-51b-0441_n
	Volume	51

73	Author	Danita De, W. Aal, *. Klaus-Jürgen, R. An	Requires cookie*
	Title	Structure Refinem ent o f Potassium Periodate at 297 and 150 K
	Abstract	The scheelitetype structure of potassium perio date, K I 0 4, has been confirmed and refined from single-crystal X-ray data at two temperatures. The compound crystallizes tetragonally, space group 14,/a, with a = 5.726(1), c = 12.607(4) Ä at 297(1) K, and a = 5.704(3), c = 12.478(8) A at 150(1) K, respectively. Except for a significant decrease in the anisotropic displacement factors, the changes in the structural parameters at low temperature are rather small.
	Reference	Z. Naturforsch. 51b, 444—446 (1996); eingegangen am 4. August 1995
	Published	1996
	Keywords	Potassium Periodate, Structure Refinement, Scheelite-Type Structure
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	TEI-XML for	default:Reihe_B/51/ZNB-1996-51b-0444_n.pdf
	Identifier	ZNB-1996-51b-0444_n
	Volume	51

74	Author	O. Sedello, Hk Müller-Buschbaum	Requires cookie*
	Title	On the Crystal Structure o f (C u ,M n )3 66M o30 12
	Abstract	Single crystals o f (Cu,M n)3 66M o 30 12 have been prepared in sealed copper tubes. X-ray investiga tions lead to orthorhombic symmetry, space group Dih-Pnm a, a = 5.1541(9), b = 10.788(2), c = 18.114(3)) Ä , Z = 4. (Cu,M n)366M o 30 12 is iso typic to NaCo2 31M o 30 12 and (C u,C o)3 75M o 30 12 with split positions for two o f the metals.
	Reference	Z. Naturforsch. 51b, 447—449 (1996); eingegangen am 31. August 1995
	Published	1996
	Keywords	Copper, Manganese, Molybdenum Oxide, Crystal Structure
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	TEI-XML for	default:Reihe_B/51/ZNB-1996-51b-0447_n.pdf
	Identifier	ZNB-1996-51b-0447_n
	Volume	51

75	Author	O. Sedello, Hk Müller-Buschbaum	Requires cookie*
	Title	On the Crystal Structure of (Cu, M n )U M o 30 12
	Abstract	Single crystals of (C u,M n)U M o30 12 have been prepared in sealed copper tubes. X-ray investiga tions lead to hexagonal symmetry, space group C\|h-P63/m, a = 9.7895 (13), c = 6.202(1) A , z = 2. (C u ,M n)U M o30 12 is isotypic to CdThM o30 12. Calculations of the Coulomb terms o f lattice energy with respect to different oxidation states o f copper, molybdenum and uranium and the pre viously described pair of isotypic compounds of CdThM o30 12 to Na2ThRe60 24 are discussed.
	Reference	Z. Naturforsch. 51b, 450—452 (1996); eingegangen am 5. September 1995
	Published	1996
	Keywords	Copper, Manganese, Uranium Molybdenum Oxide, Crystal Structure
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	TEI-XML for	default:Reihe_B/51/ZNB-1996-51b-0450_n.pdf
	Identifier	ZNB-1996-51b-0450_n
	Volume	51

76	Author	Hk Müller-Buschbaum, H. Ünsal	Requires cookie*
	Title	On Ba6Pr2C o4O i5 and Ba5SrPr2C o40 15
	Abstract	Ba6Pr2Co40 15 (I) and Ba5SrPr2Co40 15 (I I) have been prepared by high temperature C 0 2-L A S E R techniques. Both compounds crystallize with hexagonal symmetry, space group C£v-P63mc, (I): a = 11.814(1), c = 7.100(2) A ; (II): a = 11.646(1), c = 6.8602 A , Z = 2. It is remarkable that the strongly reducing Pr3+ can coexist with the more oxidizing Co3+.
	Reference	Z. Naturforsch. 51b, 453—455 (1996); eingegangen am 2. Oktober 1995
	Published	1996
	Keywords	Barium, Cobalt, Praseodym, Oxygen, Crystal Structure
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	TEI-XML for	default:Reihe_B/51/ZNB-1996-51b-0453_n.pdf
	Identifier	ZNB-1996-51b-0453_n
	Volume	51

77	Author	2s4-M Gin2s4, H. Haeuseler, W. Cordes	Requires cookie*
	Title	Subsolidus Phasenbeziehungen in den Systemen M g G a 2S4-M gC r2S4
	Abstract	Neue Verbindungen mit Spinell-, Olivin-und ZnIn2S4(IIIa)-Struktur Subsolidus Phase Relationships in the Systems M g G a 2S4-M gC r2S4 and M g G a 2S4-M gIn 2S4 N e w Compounds with Spinei-, O livine-and Zn In 2S4(IIIa)-T y p e Structure The title systems have been investigated on samples quenched at 700, 800 and 1000 °C. Five new compounds have been obtained and characterized by X-ray powder diffraction: Spinel type M gG a02C rl 8S4, two compounds crystallizing in the olivine structure, MgGaCrS4 and M gGaInS4, and two layered materials, M gGaj 5Cra5S4 and M gG aj 5In0.5S4. Lattice para meters and phase widths o f the compounds are given.
	Reference	Z. Naturforsch. 51b, 457—460 (1996); eingegangen am 6. Novem ber 1995
	Published	1996
	Keywords	Chalcogenides, Olivine Type Structure, Spinei, Layered Structures
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	TEI-XML for	default:Reihe_B/51/ZNB-1996-51b-0457.pdf
	Identifier	ZNB-1996-51b-0457
	Volume	51

78	Author	=. Eu, Hk Müller-Buschbaum, L. W. Lff	Requires cookie*
	Title	Weitere Verbindungen mit isolierten quadratischen P d 0 4-Polygonen: Compounds Containing Isolated Square Planar P d 0 4 Polygons: B aPd Ln 20 5 (L
	Abstract	New compounds o f the composition BaPdLn2O s (Ln = Eu, Gd, Dy, H o) have been prepa red by crystallization from flux. They crystallize isotypic to BaPtLn7Ö 5, space group D-4h-P4/ mbm. Eu: a = 6.6359(6), c = 5.885(3) A ; Gd: a = 6.608(3), c = 5.873(3) A ; Dy: a = 6.5431(7), c = 5.8574(8) A ; Ho: a = 6.522(4), c = 5.855(5) A , Z = 2. The crystal structure is characterized by isolated planar P d 0 4 polygons incorporated into a framework o f edge-and corner-sharing doubly capped BaO s cubes and edge-and face-sharing L n 0 6 prisms.
	Reference	Z. Naturforsch. 51b, 461—464 (1996); eingegangen am 16. Oktober 1995
	Published	1996
	Keywords	Barium, Palladium, Rare Earth Oxide, Crystal Structure
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	TEI-XML for	default:Reihe_B/51/ZNB-1996-51b-0461.pdf
	Identifier	ZNB-1996-51b-0461
	Volume	51

79	Author	Hk Sedello, Müller-Buschbaum	Requires cookie*
	Title	O
	Abstract	Single crystals of BaCuTe03T e 0 4 have been prepared by crystallisation from melts. X-ray investigations lead to orthorhombic symmetry, space group C2v-Ama2, a = 5.4869(8), b = 15.412(1), c = 7.2066(4) A , Z = 4. This compound represents a new structure type, containing B aO 10, C u 0 5, T e 0 6 and T e 0 4 polyhedra. The lone pair (E) of TeIV completes the TeIV0 4 polyhedron to a trigonal T e 0 4E bipyramid. The Te to E distance is estimated by calculations o f the Coulomb terms of lattice energy to 1.43 A .
	Reference	Z. Naturforsch. 51b, 465—468 (1996); eingegangen am 31. August 1995
	Published	1996
	Keywords	Barium, Copper, Tellurium, Oxide, Crystal Structure
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	TEI-XML for	default:Reihe_B/51/ZNB-1996-51b-0465.pdf
	Identifier	ZNB-1996-51b-0465
	Volume	51

80	Author	Z., D. Frerichs, Hk Müller-Buschbaum	Requires cookie*
	Title	Synthesis and Crystal Chemistry o f the /3-Form o f a M ixed Zinc Orthoarsenate
	Abstract	Single crystals o f Zn228M g0 72(A s 0 4) 2 have been prepared by C 0 2 L A S E R techniques. The compound crystallizes with monoclinic symmetry space group C 2h-P2j/n and the lattice parameters a = 5.292(2), b = 8.450(3), c = 7.737(3) Ä , ß = 96.33(3)°, Z = 2. Zn2 28M g072(A s O 4) 2 is isotypic to /3-Zn3(A s 0 4)2. The formation of the /3-Zn3(A s 0 4) 2 struc ture instead o f other possible orthoarsenates is discussed.
	Reference	Z. Naturforsch. 51b, 469—472 (1996); eingegangen am 2. Oktober 1995
	Published	1996
	Keywords	Zinc, Magnesium, Arsenic, Oxide, Crystal Structure
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	TEI-XML for	default:Reihe_B/51/ZNB-1996-51b-0469.pdf
	Identifier	ZNB-1996-51b-0469
	Volume	51

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