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41	Author	E. Rre, P.A M W Illiam	Requires cookie*
	Title	Interaction of the Vanadyl(IV) Cation with L-Ascorbic Acid and Related Systems
	Abstract	The interaction of V 0 2+ with L-ascorbic acid and dehydroascorbic acid was investigated by electronic spectroscopy in solution at different pH values. In the case of ascorbic acid, two different solid complexes containing one or two m onodeprotonated ascorbate ligands could be isolated and characterized. With dehydroascorbic acid, interaction begins at pH = 4 but at higher pH values the ligand is hydrolysed irreversibly, generating 2,3-diketogulonic acid. A solid complex containing this ligand could be precipitated at pH = 7. Its spectroscopic behavior confirms the interaction of the cation with an enolised form of the acid.
	Reference	Z. Naturforsch. 53b, 256—262 (1998); received O ctober 24 1997
	Published	1998
	Keywords	Vanadyl(IV), Ascorbic Acid, Oxidation Products, Solution Interactions, Solid Complexes
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	TEI-XML for	default:Reihe_B/53/ZNB-1998-53b-0256.pdf
	Identifier	ZNB-1998-53b-0256
	Volume	53

42	Author	Z. Naturforsch	Requires cookie*
	Title	Untersuchungen an Polyhalogeniden, X X X IY
	Abstract	[1] Cäsium(18-Krone-6)dichloroiodat(I), [Cs(C12H 240 6)]IC12 S tu d ies o n P olyhalides, X X X IV [1] C e siu m (1 8 -cro w n -6)d ich lo ro io d ate , [C s(C 12H 240 6)]IC12 M e rv a t E l E ssa w i3, K arl-F rie d ric h T e b b e * b a Chemical D epartm ent, The new compound [Cs(18-crown-6)]ICl2 has been prepared by the reaction of cesium chloride and 18-crown-6 with iodine chloride in ethanol and structurally characterized by X-ray diffrac tion methods. The geometries of the cation [Cs(18-crown-6)]+ and of the anion IC12~ are as expected.
	Reference	Z. Naturforsch. 53b, 263—265 (1998); eingegangen am 5. November 1997
	Published	1998
	Keywords	Polyhalogenide, Dichloroiodate, Crown Complex, Cesium Compound, Crystal Structure
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	Identifier	ZNB-1998-53b-0263_n
	Volume	53

43	Author	Ulrich Nagel, Christoph Roller	Requires cookie*
	Title	Enantioselective Catalysis, XVII [1], Enantioselective Catalytic Hydrogenation of Unfunctionalized Ketones
	Abstract	Three diastereomeric rhodium bisphosphane complexes have been applied to asymmetric hydrogenation of unfunctionalized, non-chelating aliphatic and aromatic ketones. The ee values o f the catalysis products differ considerably for the diastereomerical catalysts. 70% ee were obtained in hydrogenating butyrophenone, and 83.7% ee for pinacoline. The results depend strongly on the solvent used.
	Reference	Z. Naturforsch. 53b, 267—270 (1998); received January 15 1998
	Published	1998
	Keywords	Enantioselective Hydrogenation, Unfunctionalized Ketones, Rhodium, Salt Effect, Solvent Effect
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	Identifier	ZNB-1998-53b-0267
	Volume	53

44	Author	B. Steuer, W. Preetz	Requires cookie*
	Title	Isoselenocyanatoborate -Kristallstrukturen von (/i-Bu4N)[BH(NCSe)3] und (Ph4P)[B3H7(NCSe)] Isoselenocyanatoborates -Crystal Structures of (n-Bu4N)[BH(NCSe)3] and (Ph4P)[B3H7(NCSe)]
	Abstract	Triisoselenocyanatohydroborate(1 -), Isoselenocyanato-heptahydrotriborate(1 -), Crystal Structure The treatment of [B6 H6]2-with an excess of (SCN)2 in dichloromethane in the presence of solid KOH gives the hexaisoselenocyanatodiborate anion [B2(NCSe)6]2~ as an intermediate (<$(11B) = -10.3 ppm), from which [BH(NCSe)3] " and elemental selenium are formed. The X-ray structure determinations on single crystals of (rc-Bu4N)2[BH(NCSe)3] (1) (triclinic, space group P i with a = 8.512(2), b = 10.885(3), c = 14.895(4) Ä, a = 79.52(2), ß = 74.86(2), 7 = 86.768(2)°, Z = 2) and (Ph4P)[B3H7(NCSe)] (2) (monoclinic, space group C2, a = 7.686(5), b = 10.366(3), c = 17.533(3) A, ß = 108.89°, Z = 4) show that the selenocyanate groups are coordinated exclusively via the N atoms with average bond lengths of B-N = 1.52, C-N = 1.15, C-Se = 1.75 A and angles N-C-Se = 179°, B-N-C = 168.7 -176.8°. The N-B-N angles o f 1 range from 107.5 to 109.5°.
	Reference	Z. Naturforsch. 53b, 271—274 (1998); eingegangen am 18. Dezember 1997
	Published	1998
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	Identifier	ZNB-1998-53b-0271
	Volume	53

45	Author	Wolfgang Banße, Jana Fliegner, Stefan Sawusch, Uwe Schilde, Erhard Uhlemann	Requires cookie*
	Title	Redoxreaktionen von Molybdänverbindungen mit Bis(2-salicyliden- aniinophenvl Klisulfid. Kristallstruktur von Salicylaldehyd-2-mercapto- anilato(2-)-triphenylphosphanoxid-dioxomolybdän(VI) Redox Reactions of Molybdenum Compounds with Bis(2-salicylidene-aminophenyl)disulfide. Crystal Structure of Salicylaldehyde-2-mercaptoanilato(2-)-triphenylphosphaneoxide-dioxo- molybdenum(VI)
	Abstract	Molybdenum Chelates, Ligand Exchange Reactions, Bis(2-salicylideneaminophenyl)-disulfide, Salicylaldehyde-2-mercaptoanilato(2-)-triphenylphosphaneoxide-dioxomolybdenum(VI), Crystal Structure The reactions of M o(CO)6, Mo(acac)2(NO)2, and M o 0 2(acac) 2 with bis(2-salicylidene-aminophenyl)disulfide in the presence of triphenylphosphane have been studied. The crystal structure of salicylaldehyde-2-mercaptoanilato(2-)-triphenylphosphaneoxide-dioxomolybdenum(VI) was determined by X-ray analysis.
	Reference	Z. Naturforsch. 53b, 275—278 (1998); eingegangen am 23. Dezember 1997
	Published	1998
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	Identifier	ZNB-1998-53b-0275
	Volume	53

46	Author	Z. Naturforsch	Requires cookie*
	Title	Ag+ als Substituent eines Alkalimetalls in Ag2SrMnV20 8
	Abstract	Single crystals of Ag2 SrM nV20 8 have been prepared by reactions of metallic silver and a mixture of S rC 0 3, M nC 03 HoO and V ?0 5. X-Ray investigations showed monoclinic symmetry, space group Cfh-C2/c, a = 9.7022(9), b = 5.5882(5), c = 13.894(1), ß = 90.41(1)°, Z = 4. The crystal structure is isotypic to N a2BaCuV20 8 and includes V 0 4 tetrahedra, M n 0 6 octahedra as well as irregular A g 0 8 and S rO !0 polyhedra. Ag2SrM nV20 8 is characterized by a [MnV20 8] network incorporating Ag+ and S r + or a [Ag2V 2Ö 8] frame incorporating Mn2+ and Sr2+ ions. Ag+ is able to replace an alkali ion in the cationic part of the crystal structure.
	Reference	Z. Naturforsch. 53b, 279—282 (1998); eingegangen am 17. November 1997
	Published	1998
	Keywords	Silver, Strontium, Manganese, Vanadium Oxide
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	Identifier	ZNB-1998-53b-0279
	Volume	53

47	Author	Hk Wulff, Müller-Buschbaum	Requires cookie*
	Title	Isolierte trigonale S r 0 6-Prismen verknüpfen Kagome-Netze im Strontium-Manganat(I V)-Tellurat( VI): SrMnTe06 Kagome Layers Connected by Isolated Trigonal Sr06 Prisms in the Strontium Manganate(IV) Tellurate(VI): SrMnTe06 L
	Abstract	Single crystals of the hitherto unknown compound SrM nT e06 have been prepared from Sr(0H)2-8H20 , M n C 0 3(aq) and T e 0 2 in air by crystallization below the melt range. X-ray in vestigations showed hexagonal symmetry, space group D3h-P62m, lattice constants a = 5.143(1), c = 5.384(2) A, Z = 1. SrM nTe06 is characterized by staggered [(Mn/Te)60 18] Kagome layers along [001]. These layers are connected by Sr2+ ions, resulting in S r0 6 prisms isolated from each other. The structure is discussed with respect to the connection of Kagome nets in the quaternary oxides of the Ba3Ln40 9 type.
	Reference	Z. Naturforsch. 53b, 283—286 (1998); eingegangen am 7. November 1997
	Published	1998
	Keywords	Strontium, Manganese, Tellurate, Crystal Structure
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	Identifier	ZNB-1998-53b-0283
	Volume	53

48	Author	B. Wedel, L. Wulff, Hk Müller-Buschbaum	Requires cookie*
	Title	Isolierte ^[TeOs]-Oktaederketten im Bleitellurat Pb2T e05 Isolated ^ [Te05] Chains of Octahedra in the Lead Tellurate Pb2T e05
	Abstract	Single crystals of Pb2T e0 5 have been prepared by flux techniques. X-ray investigations showed a new crystal structure with monoclinic symmetry, space group Cj-Cc, a = 13.099(3), b = 5.714(1), c = 7.520(2) Ä, ß = 123,80(3)°, Z = 4. Pb2T e 0 5 is characterized by o[o[Te05] chains of octahedra isolated from each other and incorporated into an edge, corner and face connected frame of P b 0 7 polyhedra. Possible positions o f the lone pair o f electrons of Pb2+ are estimated by calculations of Coulomb terms of lattice energy.
	Reference	Z. Naturforsch. 53b, 287—290 (1998); eingegangen am 17. November 1997
	Published	1998
	Keywords	Lead, Tellurate, Crystal Structure
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	Identifier	ZNB-1998-53b-0287
	Volume	53

49	Author	R. Rettich, Hk Müller-Buschbaum	Requires cookie*
	Title	Zur Kristallchemie der Silber-Mangan-Oxovanadate Ag2BaMnV20 8 und (AgCa2)Mn2(V 04)3 On the Crystal Chemistry of the Silver Manganese Oxovanadates Ag?BaMnV?Oo and (AgCa2)Mn2(V 0 4)3
	Reference	Z. Naturforsch. 53b, 291—295 (1998); eingegangen am 12. Januar 1998
	Published	1998
	Keywords	Barium, Calcium, Manganese, Vanadium Oxide, Crystal Structure
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	Identifier	ZNB-1998-53b-0291
	Volume	53

50	Author	Cyanhydrine	Requires cookie*
	Title	Zur Synthese fluororganischer 0-(Trimethylsilyl)-cyanhydrine
	Abstract	[ 1 ] sind wertvolle Ausgangsverbin dungen zur Synthese von z.B. Wirkstoffen. An dererseits sind zahlreiche halogen-, insbesondere fluorsubstituierte Substanzen als pharmakologisch spezifisch wirksam erkannt worden [ 2 -4 ] , Deren Cyanhydrine sind jedoch oftmals -ebenso wie bei sterisch gehinderten Ausgangsverbindungen -nicht direkt aus Aldehyden oder Ketonen und Cyanwas serstoff erhältlich, da das Gleichgewicht der Cyan-hydrinbildung weitgehend oder ganz auf der Sei te der Edukte liegt. Das gilt auch für aliphatische, mehr noch für aromatische Ketone. Wird der Bin dungsgrad der C =0-G ruppe durch fluororganische Reste erhöht, sind klassische Carbonylreaktionen überhaupt nicht mehr beobachtbar. Im Gegensatz dazu verläuft die Reaktion solcher Carbonylgruppen mit Trimethyl-silylcyanid (TM SCN) in der Regel problemlos zu den 0-(Trim ethyl-silyl)-cyanhydrinen [5], wie es gleichzeitig und un abhängig auch für "normale" Aldehyde und Ke tone [6 , 7] sowie für Epoxide, Säurechloride und Chlorkohlensäureester [8] gezeigt werden konnte. Entgegen älteren Literaturangaben [6 , 9] können auf diesem Umweg aus den O-Silylcyanhydrinen durch Hydrolyse mit verdünnter Salzsäure die auf * Sonderdruckanforderungen an Prof. Dr. W. Sundermeyer.
	Reference	Z. Naturforsch. 53b, 296 (1998)
	Published	1998
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	Identifier	ZNB-1998-53b-0296
	Volume	53

51	Author	Hans-Friedrich Klein, Alexandra Brand, Gerhard Cordier	Requires cookie*
	Title	Synthesis and Reactions with CO and C2H4 of Cobalt(I) Complexes Containing Trimethylphosphine and Chelating o-Diphenylphosphanyl- phenolate Ligands
	Abstract	In tetracoordinate cobalt(I) halide compounds CoX(Ph2P ^ O H)(P M e3)2 (X = CI, Br) o-phos-phanylphenols PhaP^O H are coordinated as phosphane ligands. In the presence o f base chelat ing anions Ph2P ^ O _ give rise to pentacoordinate com plexes Co(Ph2 P ^ O)(P M e3)3. M olec ular structures are presented for both types o f compounds. The five-membered chelate ring in Co(Ph2P ^ O)(P M e3)3 is resistant to protonation, and ring-opening is not observed in the presence o f CO or C2H4. Replacing one o f the trimethylphosphanes by one o f the 7r-acceptor ligands affords fiuxional com plex m olecules which upon cooling attain definite ground-state geometries out o f a multitude o f possible isomers.
	Reference	Z. Naturforsch. 53b, 307 (1998); received November 28 1997
	Published	1998
	Keywords	Cobalt, o-Phosphanylphenolate Complexes, Synthesis, Structure, Fluxionality
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	Identifier	ZNB-1998-53b-0307
	Volume	53

52	Author	N. Sauerwalda, M. Schwenka, J. Polster3, E. Bengschb	Requires cookie*
	Title	Spectrometric pK Determination of Daphnetin, Chlorogenic Acid and Quercetin
	Abstract	Daphnetin, Chlorogenic Acid, Quercetin Polyphenols play an important role in the 'immune system ' of plants. Since their charge is important for their physiological effect it is important to know their pKj values. Therefore, the pKj values of some plant contents such as daphnetin (pK = 7.36), chlorogenic acid (pK « 8.5), and quercetin (pKi = 7.03, pfro = 9 .1 5) were determined in the pH range 7 -1 0 using UV/VIS spectroscopy. The decomposition kinetics of quercetin in alkaline solutions was taken into consideration by extrapolating the absorbance time curves to time zero (t = 0). The graphic method of absorbance (A) diagrams was used to determine the pKi values. In the case of quercetin the method of linear regression was also used for the determination.
	Reference	Z. Naturforsch. 53b, 315—321 (1998); received September 15 1997
	Published	1998
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	Identifier	ZNB-1998-53b-0315
	Volume	53

53	Author	Z. Naturforsch	Requires cookie*
	Title	Bonding in an Unusual Nickel Carbide
	Abstract	The bonding in an unusual nickel carbide polymer network synthesized by Musanke and Jeitschko is analyzed using qualitative, band-structure calculations in the framework of extended Hiickel tight-binding theory. The carbide features infinite, one-dimensional, vertex-sharing chains of Ni squares. Each square is centered by a carbon and flanked by C: units. -In this electron-rich polymer, the Ni atoms act as electron acceptors through their s and p orbitals. The orbital interaction schemes reveal that there is little Ni-Ni bonding and essentially no Ni to C2 back-donation. Molecular orbital interaction diagrams of some molecular models are used to describe the bonding in ^[N i^C s]8 -. We also discuss the stability of the planar building block of the polymer, (CNi.;)4"' (which resembles planar CH4) with respect to a "tetrahedral" alternative and we do so for the extended ^ [ N i3C]4-and ^[Ni.^C?]8-chains. In each model case the tetrahedral alternative is favored, and there is no sign of stabilization of a crucial C L4 orbital. Such stabilization is partially achieved through bonding to two Ca axial to the C in the center of the Ni4 ring, but it takes the entire inter-chain calcium network to effect the observed stabilization.
	Reference	Z. Naturforsch. 53b, 322—332 (1998); received November 4 1997
	Published	1998
	Keywords	Carbides, Molecular Orbitals, Electronic Structure, Metal Carbides, Square-Planar Carbon
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	Identifier	ZNB-1998-53b-0322
	Volume	53

54	Author	Nils Wiberg, Kerstin Amelunxen, Hans-Wolfram Lemer, Heinrich Nöth, Jörg Knizek, Ingo Krossing	Requires cookie*
	Title	Supersilylverbindungen der Borgruppenelemente
	Abstract	, IV [1]. Supersilylelementhalogenide fBu3SiEX2 und (fBu3Si)2EX mit E = Al, Ga, In: Synthesen, Eigenschaften, Strukturen [2] Supersilylated Compounds of the Thirteenth Group, IV [I]. Supersilylelement Halides rBu3SiEX2 and (/Bu3Si)2EX with E = Al, Ga, In: Syntheses, Properties, Structures [2] Water and oxygen sensitive compounds (rBu3SiEX2)2, fBu3SiEX2 Do and (rBu3Si)2EX (E = AI, Ga, In; X = (F), Cl, Br; Do = OR2, NR3) have been synthezised by reaction of EX3 with rBu3SiNa in the absence or presence of donors. In addition, (?Bu3Si)AlBr2, (fBu3Si)2InF and rBu3SiInBr2 were prepared by reaction of AlBr3 with (rBu3Sij2Zn or of (/Bu3Si)2In-In(Si/Bu3)2 with AgF2 and HBr, respectively. The adduct [rBu3SiAlBr2 AlBr3 '/ 2M gBr2]2 is formed from AlBr3 and (fBu3Si)2Mg(THF)2. Thermal decomposition of the compounds in solution or in the gas phase leads to the formation of ?Bu3SiEX2 (from the dimers or the donor adducts) and of fBu3SiX. The Lewis acidity of ?Bu3SiEX2 against donors incre ases in the direction Do = Et20 < THF < NEtM e2. Dehalogenation of (/Bu3Si)2ECl with /Bu3SiNa(THF)2 in pentane at room temperature leads to clusters (rBu3Si)4Al2, (fBu3Si)3Ga2*, (fBu3Si)4In2 and (rBu3Si)3Ga2Na(THF)3, reduction of rBu3SiGaCl2 with Na or K in heptane at 100°C to the tetrahedran (rBu3Si)4Ga4. The structures of (rBu3SiGaCl2)2, (fBu3Si)2GaCl, and [/Bu3SiAlBr2 AlBr3-'/2MgBr2]2 have been determined by X-ray structure analysis.
	Reference	Z. Naturforsch. 53b, 333—348 (1998); eingegangen am 7. November 1997
	Published	1998
	Keywords	Supersilylaluminum Halides, Supersilylgallium Halides, Supersilylindium Halides, Acid-base Reactions, Redox-Reactions, X-Ray Data
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	Identifier	ZNB-1998-53b-0333
	Volume	53

55	Author	Anja Loose, WilliamS. Sheldrick	Requires cookie*
	Title	Solventothermal Synthesis of the Lamellar Selenidostannates(IV) A2Sn4Se9*H20 (A = Rb, Cs) and Cs2Sn2Se6
	Abstract	Reaction of A 2C O 3 with Sn and Se in an H 2O /CH 3OH mixture at 115 -130°C affords the isotypic lamellar selenidostannates A2Sn4Se9-H20 1 (A = Rb) and 2 (A = Cs). The polyanions ^ [Sn4Se92~] exhibit S ^ S e s molecular building units, in which two adjacent Sn(IV) atoms of an Sn4Se4 8-membered ring are bridged by an additional Se atom. These units connect through (SnSe)2 4-mem bered rings to afford a 44 anionic net with 16-membered cavities. Cs2Sn2Se6 (3) may be prepared by methanolothermal reaction of CstCO^ with SnSe and Se at 130°C and contains porous 2 [SnTSeö2 -] sheets in which [SnSes--] ribbons are linked through Se-Se bonds. The resulting 4 net displays 14-membered pores in which the Cs cations reside.
	Reference	Z. Naturforsch. 53b, 349—354 (1998); received December 29 1997
	Published	1998
	Keywords	Tin, Selenium, Selenidostannates(IV), Lamellar Structures, Solventothermal Synthesis
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	Identifier	ZNB-1998-53b-0349
	Volume	53

56	Author	Uwe Klingebiel, Brigitte Tecklenburg, Mathias Noltemeyer, Dieter Schmidt-Bäse, Regine Herbst-Irmer	Requires cookie*
	Title	Cyclodisilazane in cis-Konformation -eine einfache Synthese Cyclodisilazanes in cis Conformation -a Facile Synthesis
	Abstract	Dilithium derivatives of bis(silylamino)fluorosilanes (1-3) react with chlorotrimethylsilane to give dilithium derivatives of the corresponding bis(silylamino)chlorosilanes and Me3SiF. LiCl-elimination in the presence of THF leads to the formation of silaamidides, which are
	Reference	Z. Naturforsch. 53b, 355—360 (1998); eingegangen am 14. Januar 1998
	Published	1998
	Keywords	Silicon, Lithium, Silylamide, Silaamidide, Cyclodisilazane
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	Identifier	ZNB-1998-53b-0355
	Volume	53

57	Author	Oppermann, S. Herrera, DaoQuoc Huong	Requires cookie*
	Title	Untersuchungen zum chemischen Transport von YX3 mit A1X3 und zur Existenz von gasförmigen und festen Komplexen YA13 X12 (X = Br, I) Investigations on the Chemical Transport Reaction of YX3 with A1X3 and on the Existence of Gaseous and Solid Complexes YA13 X 12 (X = Br, I) H
	Abstract	The dominant gaseous complexes YAl3B r12 and YA13I 12 were generated in the chemical trans port reactions of YBr3 with AlBr3 and YI3 with A1I3. The enthalpy of formation Z\H£(YAl3B r12,gi298) = -484,5 ± 6 kcal/mol and the standard entropy S°(YA13B 12 g 298) = 290,0 ± 7,5 cal/K mol have been calculated. It follows from total pressure measurements of mixtures of YBr3 s with AlBr3 1 and YI3 s with A1I3 b respectively, that complexes YAl3B r12 s and YA13I 12 s do not exist up to the boiling points of the aluminium trihalides.
	Reference	Z. Naturforsch. 53b, 361—366 (1998); eingegangen am 1. Dezember 1997
	Published	1998
	Keywords	Chemical Transport Reaction, Yttrium Aluminium Halides, Enthalpy of Formation, Standard Entropy, Total Pressure Measurements
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	Identifier	ZNB-1998-53b-0361
	Volume	53

58	Author	C. Aguilera, M. Parra, G. Fuentes	Requires cookie*
	Title	Synthesis and Mesomorphic Properties of Polymethylene-a,u;-bis [2-thio- 5-(4',4"n-alcoxybenzoyIoxy)phenyl]-l,3,4-oxadiazole
	Abstract	Three homologous series of polymethylene-a,i<;-bis[2-thio-5(4',4''n-alkoxybenzoyloxy)-phenyl]-l,3,4-oxadiazole (series 5 a, b, c), are reported.The compounds have identical meso-genic units at both ends of a spacer (i.e. they are twins). These twins possess a spacer of 6, 8 and 10 carbon atoms joined directly to the oxadiazole ring through sulphur atoms. The lateral alkylic chains vary between 6 and 10 carbon atoms.The presence of enantiotropic and m onotropic nematic phase is related to the length of the spacer group. The influence of molecular structure on the mesomorphic properties has been studied. Me somorphic properties and phase transitions have been determined using polarizing hot-stage microscopy and differential scanning calorimetry.
	Reference	Z. Naturforsch. 53b, 367—370 (1998); received May 15 1997
	Published	1998
	Keywords	Liquid Crystal, Twin Mesogens, Oxadiazole, M esomorphic Properties
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	Identifier	ZNB-1998-53b-0367
	Volume	53

59	Author		Requires cookie*
	Title	Syntheses and Structures of Cyclopentadienyl Arsenic (III) Compounds Part IIIa: Tetraisopropylcyclopentadienyl Arsenic (III) Dibromide and Tetraisopropyl- cyclopentadienyl Arsenic (III) Diiodide (TipCpAsBr2, TipCpAsI2)
	Reference	Z. Naturforsch. 53b, 371 (1998)
	Published	1998
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	Identifier	ZNB-1998-53b-0371
	Volume	53

60	Author	Z. Naturforsch	Requires cookie*
	Title	Kristallstruktur
	Abstract	von [Mo(CO)3(NCMe)(SrBu)]2 C ry stal S tru c tu re o f [M o (C O)3(N C M e)(S rB u)]2 M ike R. K opp, B e rn h a rd N eu m ü ller* Single crystals of [M o(CO)3(NCM e)(S'Bu)]2 (1) and [{Mo(CO)3}2{Mo(CO)2}{S'Bu}4] (2) were obtained by the reaction of [M o(CO)3(NCM e)3] with [(PhCH2)2GaS'Bu]2 in 1,4-dio-xane. The X-ray structure determination of 1 showed the presence of a Mo2S2 four-membe-red ring with a Mo-Mo bond length of 296,7(1) pm. Space group Pbca, Z = 4, lattice dim en sions at -80 °C: a = 1588,2(3), b = 905,8(1), c = 1676,0(1) pm, R y = 0,0555.
	Reference	Z. Naturforsch. 53b, 378—380 (1998); eingegangen am 8. Dezember 1997
	Published	1998
	Keywords	Molybdenum Carbonyl Complex, Thiolato Complex, Crystal Structure
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	Identifier	ZNB-1998-53b-0378
	Volume	53

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