ZfN: Search Results

Browse byFacets

Bookbag ( 0 )

Facet Publication Year 1996 [X]
Facet section ZfN Section B [X]

Results 295 Items

6

101	Author	KhalidM. Ohammed Khana, Farnaz Malikb, Mashooda Hasanb, Shahnaz Perveen3, Jodwiga Frelekc, G. Ünther Snatzke+, Wolfgang Voelter3	Requires cookie*
	Title	Circular Dichroism Studies on New Optically Active 1,5-Benzodiazepine Derivatives
	Abstract	From thirty three new optically active 1,5-benzodiazepine derivatives the UV and CD data are reported and the bands discussed related to corresponding electronic transitions respectively stereochemical features.
	Reference	Z. Naturforsch. 51b, 588—598 (1996); recieved September 26 1995
	Published	1996
	Keywords	CD Spectra, Benzodiazepines, Chiral 1, 5-Benzodiazepine Derivatives
	Similar Items	Find
	DEBUG INFO
	TEI-XML for	default:Reihe_B/51/ZNB-1996-51b-0588.pdf
	Identifier	ZNB-1996-51b-0588
	Volume	51

102	Author	Rolf Minkwitz, RaimUnd Bröchler, Hans Preut	Requires cookie*
	Title	Low-Temperature Crystal Structure of the Inclusion Compound {[N(CH3)4+C1]2] * CH 3CN * h 2o
	Abstract	The crystal structure of {[N(CH3)4+C1]2}-CFI3C N H 20 is reported. Cry-stalls are orthorhombic, space group Pnma, with a = 1622.9(15), b = 671.3(6), c = 1511.2(11) pm, V = 1646(2) 106 pm3 and Z = 4.
	Reference	Z. Naturforsch. 51b, 599—601 (1996); eingegangen am 3. August 1995
	Published	1996
	Keywords	Preparation, Crystal Structure, Inclusion Compound
	Similar Items	Find
	DEBUG INFO
	TEI-XML for	default:Reihe_B/51/ZNB-1996-51b-0599_n.pdf
	Identifier	ZNB-1996-51b-0599_n
	Volume	51

103	Author	Bernhard Neumüller, Felora Heshm, Kurt Dehnicke	Requires cookie*
	Title	Crystal Structure of [(THF)2Li(/*2-Cl)2TiCl?(THF)2]
	Abstract	The crystal structure of the title com pound has been determined by X-ray methods. Space group C2/c, Z = 4, lattice dimensions at -8 0 °C: a = 1343.8(2), b = 1031.6(1), c = 1669.4(1) pm, ß = 96.47(1)°. The compound forms an ion pair in which the lithium atom is coordinated in a distorted tetrahedral geometry by two T H F mole cules and by two chlorine atoms. The halide atoms have a /^-bridging function, coordinating the li thium and the titanium center. The titanium atom possesses a distorted octahedral environm ent with two TH F ligands in rrans-position.
	Reference	Z. Naturforsch. 51b, 602—604 (1996); eingegangen am 23. O ktober 1995
	Published	1996
	Similar Items	Find
	DEBUG INFO
	TEI-XML for	default:Reihe_B/51/ZNB-1996-51b-0602_n.pdf
	Identifier	ZNB-1996-51b-0602_n
	Volume	51

104	Author	Karsten Fischer, Elisabeth Feldbaum-M, Petra Öller, Volker Vogt, Horst Winter, Sabrowsky	Requires cookie*
	Title	CsNaTe -D arstellung und Charakterisierung von Cäsium natrium tellurid CsNaTe -Preparation and Characterization of Cesium Sodium Telluride
	Abstract	X-Ray, Cesium Sodium Telluride The dark green compound CsNaTe has been prepared. The characterization by X-ray powder methods leads to a tetragonal lattice (P4/nmm) with a = 530.8 (4), c = 853.2 (1) pm and Z = 2. The structure ist related to the PbFCl structure type.
	Reference	Z. Naturforsch. 51b, 605—606 (1996); eingegangen am 18. Januar 1995
	Published	1996
	Similar Items	Find
	DEBUG INFO
	TEI-XML for	default:Reihe_B/51/ZNB-1996-51b-0605_n.pdf
	Identifier	ZNB-1996-51b-0605_n
	Volume	51

105	Author	Claus Feldm, M. Artin, Jansen5	Requires cookie*
	Title	O ptische A b sorp tion der A uride M3A11O ( Optical Absorption of the Aurides M3AuO (M = K, Rb, Cs)
	Abstract	The optical absorption of the aurides M3AuO (M = K, Rb, Cs) and CsAu has been determ inated by UV/VIS spectroscopy. The band gaps have been found to be 2,35(2) eV (Cs3AuO) and 2,30(2) eV (CsAu). This corresponds to a more pronounced anionic character of gold in Cs3AuO as com pared to CsAu. In the case of K3AuO and R b3AuO no band gap was detectable.
	Reference	Z. Naturforsch. 51b, 607—608 (1996); eingegangen am 24. Juli 1995
	Published	1996
	Keywords	Aurides, Optical A bsorption, UV-VIS Spectra
	Similar Items	Find
	DEBUG INFO
	TEI-XML for	default:Reihe_B/51/ZNB-1996-51b-0607_n.pdf
	Identifier	ZNB-1996-51b-0607_n
	Volume	51

106	Author	D. Bublitz, A. Franken, W. Preetz, H. Thomsen	Requires cookie*
	Title	Darstellung, U B-NMR-Spektren, Schwingungsspektren und Normalkoordi- natenanalyse von cowy'HWcto-Bis-hexahydro-c/oso-hexaborat, [B6H6-B 6H6]2_, sowie Kristallstruktur von [P(C6H5)4 ]2-cöW7 ww^o-[B6H6-B 6H6 ] Preparation, 11B NMR Spectra, Vibrational Spectra and Normal Coordinate Analysis of con ju ncto-B is-h exah ydro-closo-h exaboratQ , [B6H6-B 6H6]2_, and the Crystal Structure of [ P(C6 H5 )4 ] 2 -conjuncto-[B6 H6-B 6 H6 ]
	Abstract	By reaction of [B6H6]2-with dibenzoylperoxide in dichloromethane conjuncto-[B6H6-b 6h 6]2-is formed. The product could be separated from excess [B6H6]2 by ion exchange chro matography on diethylaminoethyl cellulose. The crystal structure of [P(C6H^ ^ -con ju n cto-[B6H6-B 6H6 ] has been determined by single crystal X-ray diffraction analysis; triclinic, space group PI with a = 10.8315(10), b = 11,2422(12), c = 20.340(2) Ä, a = 91.278° (9), ß = 9 0 .\78° (9), 7 = 105.662°(9). The 1 'B NMR spectrum reveals three signals with the intensity ratio 1:1:4, for two equivalent moieties of the conjuncto molecule ion with local C4v symmetry. The IR and Raman spectra of the deprotonated Cs salts of the 1()B, n B and their respective D isotopomers of conjuncto-[B6H5-B6HS]4_ exhibit characteristic shifts. Using averaged crystallographic data and assuming idealized D4h symmetry, normal coordinate analyses have been performed based on a modified valence force field. With a set of eleven force constants (e.g. fd(BB)C 0njU IK.t0 = 2.9, fd(BB)cage = 1.6 mdyn/A) very good agreement between observed and calculated frequencies has been achieved. From strong vibrational coupling with the B6 clusters two vibrations result for the conjuncto B-B bond at 1142/1198 and 292/304cm-1 for 1 'B/I(IB species, respectively. They can be assigned as anti-phase and in-phase motions of the conjuncto B atoms related to the equatorial B4 planes.
	Reference	Z. Naturforsch. 51b, 609—618 (1996); eingegangen am 7. September 1995
	Published	1996
	Keywords	Crystal Structure, n B NMR Spectra, Vibra tional Spectra, Normal Coordinate Analysis
	Similar Items	Find
	DEBUG INFO
	TEI-XML for	default:Reihe_B/51/ZNB-1996-51b-0609_n.pdf
	Identifier	ZNB-1996-51b-0609_n
	Volume	51

107	Author	KarinD. Öllinga, Andre Krugb, Helmut Hartungb, Horst Weichmanna	Requires cookie*
	Title	Reaktion von Iodomethylzinnverbindungen mit (S)-l-f-Butyloxycarbonyl- 2-f-butyl-3-methyl-4-imidazolidinon (Boc-BMI) Reaction o f Iodomethyltin Compounds with (S^-l-r-Butyloxycarbonyl- 2-?-butyl-3-methyl-4-imidazolidinone (Boc-BM I)
	Abstract	Imidazolidin-4-one, Triorganostannylmethylation, 1,2-Oxastannolane Diastereoselective alkylation of (5')-2-r-butyl-l-r-butyloxycarbonyl-3-methyl-4-imidazoli-dinone (Boc-BMI) 1 with R3SnCH2I yields triorganostannylmethylated Boc-BMI compounds, 2 and 3 (2: R = Me; 3: R = Ph). By halogenation 2 and 3 are transformed into the halostannyl-substituted compounds R3_ nX"SnCH2-Boc-BMI 4 -8 (R = Me, Ph; n = 1, 2; X = Cl, Br). Analogously, the trifluoroacetyloxostannylated compounds 9 and 10 (9: R = Me; 10: R = Ph) are formed by reaction of 2 and 3 with trifluoracetic acid. 4 (R = Me; n = 1; X = Cl) has been structurally characterized in detail by NMR spectroscopy and X-ray analysis. Its tin atom is pentacoordinated by intramolecular coordination of the CO group of the imidazolidinone ring. The alkylation of 1 with Me2Sn(CH2I)2 yields the bis-Boc-BMI tin compound 11 and the iodomethyl dimethylstannylmethylated Boc-BMI 12. 11 reacts with one or two equivalents of bromine to give the bromostannylated derivatives 13 and 14, respectively.
	Reference	Z. Naturforsch. 51b, 619—628 (1996); eingegangen am 8. November 1995
	Published	1996
	Similar Items	Find
	DEBUG INFO
	TEI-XML for	default:Reihe_B/51/ZNB-1996-51b-0619.pdf
	Identifier	ZNB-1996-51b-0619
	Volume	51

108	Author	Nils Wiberg, Susanne Wagner	Requires cookie*
	Title	Zur Reaktivität des Silaethens M e2Si=C(SiM e3 )2 : Regioselektivität, Stereo selektivität und relative Geschwindigkeiten von En-Reaktionen [1] On the Reactivity o f Silaethene Me2Si=C (SiM e3)2: Regioselectivity, Stereoselectivity and Relative Rates o f Ene Reactions [1]
	Abstract	Silaethene, Ene Reactions with Propene and Derivatives, Relative Rates of Ene Reactions Ene reactions of Me2Si=C(SiMe3)2 (1) w'th propene or with methyl derivatives of propene and 1,3-butadiene, respectively, of the formula R'CH=CR2-CH2R3 take place regioselectively, as well as stereoselectively and are retarded by increasing bulk of R1, R3 (for example H < CH3 < CH=CH2 < CH=CHMe), as well as accelerated by an increasing tendency of R2 to donate electrons (for example H < CH3 « CH=CH2 < CH2SiMe2[CH(SiMe3)2]). It is concluded from these studies, that ene reactions of 1 occur concerted and are HOMOene-LUMOenophjie controlled.
	Reference	Z. Naturforsch. 51b, 629—636 (1996); eingegangen am 8. November 1995
	Published	1996
	Similar Items	Find
	DEBUG INFO
	TEI-XML for	default:Reihe_B/51/ZNB-1996-51b-0629.pdf
	Identifier	ZNB-1996-51b-0629
	Volume	51

109	Author	Thomas Kräuter, Bert Werner, Bernhard Neumüller	Requires cookie*
	Title	Synthese
	Abstract	und Eigenschaften von Benzylgallium(indium)-Verbindungen. Die Kristallstrukturen von [(PhCH2)2GaBr]2, [(PhCH2)2GaN(H)f-Bu]2 und [PhCH2InCl2(THF)2] Synthesis and Properties o f Benzylgallium(indium) Compounds. The Crystal Structures o f [(PhCH2)2GaBr]2, [(PhCH2)2GaN(H)r-Bu]2 and [PhCH2InCl2(THF)2] (PhCH2)2GaBr (1) can be obtained by the redistribution reaction of GaBr3 with Ga(CH2Ph)3 in a molar ratio 1:2. Treatment of 1 or (PhCH2)2GaCl with one equivalent of LiN(H)/-Bu gives the diorganogallium amide [(PhCH2)2GaN(H)r-Bu]2 (2). The toluene-insoluble PhCH2InCl2 can be structurally investigated after dissolving in THF and crystallization as [PhCH2InCl2(THF)2] (3). 1 -3 were characterized with NMR, IR and MS techniques as well as by X-ray structure determinations. 1 forms two crystallographic independent dimers while 2 is a centrosymmetric dimer in the solid state. 3 is a monomer with a trigonal-bipyramidal coordination sphere at the indium center.
	Reference	Z. Naturforsch. 51b, 637—645 (1996); eingegangen am 14. September 1995
	Published	1996
	Keywords	Gallium Compounds, Indium Compound, Crystal Structure
	Similar Items	Find
	DEBUG INFO
	TEI-XML for	default:Reihe_B/51/ZNB-1996-51b-0637.pdf
	Identifier	ZNB-1996-51b-0637
	Volume	51

110	Author	Ralf Czekalla, Wolfgang Jeitschko, Rolf-Dieter Hoffmann, Helmut Rabeneck	Requires cookie*
	Title	Preparation, Crystal Structure, and Properties of the Lanthanoid Carbides Ln4C7 with Ln = Ho, Er, Tm, and Lu
	Abstract	The isotypic carbides Ln4C7 (Ln = Ho, Er, Tm, Lu) were prepared by arc-melting of the elemental components, followed by annealing at 1300 °C. The positions of the metal and of some carbon atoms of the monoclinic crystal structure of LU4C7 were determined from X-ray powder data, and the last carbon positions were found and refined from neutron powder diffraction data: P2,/c, a = 360.4(1), b = 1351.4(3), c = 629.0(2) pm, ß = 104.97(2)°, Z = 2, R = 0.026 for 429 structure factors and 15 positional parameters. The structure contains isolated carbon atoms with octahedral lutetium coordination and linear Cvunits, with C-C bond lengths of 132(1) and 135(1) pm. This carbide may therefore be considered as derived from methane and propadiene. The hydrolysis of LU4C7 with distilled water yields mainly methane and propine, while the hydrolyses of the corresponding holmium and erbium carbides resulted in relatively large amounts of saturated and unsaturated C2-hydrocarbons in addition to the expected products methane and propine. The structure comprises two-dimensionally infinite NaCl-type building elements, which are separated by the C3-units. It may be described as a stacking variant of a previously reported structure of H04C7, now designated as the a-modification. The Lu4C7-type /^-modification was obtained at higher temperatures. Its structure was refined by the Rietveld method from X-ray powder data to a residual R = 0.037 for 320 F values and 15 positional parameters. Lu4C7 is Pauli paramagnetic; /3-H04C7 and Er4C7 show Curie-Weiss behavior with magnetic ordering temperatures of less than 20 K.
	Reference	Z. Naturforsch. 51b, 646—654 (1996); received August 28 1995
	Published	1996
	Keywords	Binary Lanthanoid Carbides, Magnetic Properties, Hydrolyses of Carbides, Crystal Structure
	Similar Items	Find
	DEBUG INFO
	TEI-XML for	default:Reihe_B/51/ZNB-1996-51b-0646.pdf
	Identifier	ZNB-1996-51b-0646
	Volume	51

111	Author	Dirk Johrendt, Albrecht Mewis	Requires cookie*
	Title	The Electronic Structure o f Ternary Transition Metal Pnictides. I. AlBo-Variants
	Abstract	The electronic structure and bonding of some ternary AlB2-type compounds AMX (A=2a-, X=5b-element, M=transition metal) were studied by means of Extended-Hückel and TB-LMTO-ASA calculations. Previous geometric stability criteria of the AIB2 structure have been extended, and reasons for some structural peculiarities and distortions are given. A simple orbital interaction scheme based on local symmetry is used as starting point to investigate the electronic properties of these compounds, whereas the band structures of the ZrBeSi-type SrPdAs and the Peierls-distorted variants CaPdAs and BaPdP are described in more detail. The results of calculations and resistivity measurements are discussed within the scope of Zintl's concept under consideration of the transition metal d-orbitals. It turns out that these solids can be described as metallic Zintl compounds.
	Reference	Z. Naturforsch. 51b, 655—664 (1996); eingegangen am 6. November 1995
	Published	1996
	Keywords	Ternary Pnictides, Electronic Structure, Stability Criteria, Zintl Concept
	Similar Items	Find
	DEBUG INFO
	TEI-XML for	default:Reihe_B/51/ZNB-1996-51b-0655.pdf
	Identifier	ZNB-1996-51b-0655
	Volume	51

112	Author	Ayhan Elmalia, Yalcin Elerman3, Ingrid Svoboda, Hartmut Fuessb, Klaus Griesar0, Wolfgang Haasec	Requires cookie*
	Title	Structure and Spin-Spin Interactions in a Linear Trinuclear Ni(II) Complex
	Abstract	[Ni3(C2H302)2(C3H8N0)2L2] 1(L=N,N'-1,3-propyl-disalicylaldimine), (C2H30 2)=acetate, (C3H><NO)=hydroxymethyl-dimethylamine] has been synthesized and its crystal structure de termined, [C44H54N6OioNi3], triclinic, space group Pi, a = 9.560(1), b = 10.681(1), c = 12.200(1) A ,a = 112.17(1), ß = 101.25(1), 7 = 90.32(1)°, V = 1127.3 A \ Z = l.The molecule is linearly trinuclear with octahedral coordination of each nickel ion. The Ni-Ni distance is 3.048(1) A. Each nickel(II) atom is in an octahedral coordination. Magnetic susceptibility mea surements in the range 4.2 < T < 280 K have revealed antiferromagnetic coupling between adjacent Ni atoms (J\ = -2.2 cm-1) and between the terminal Ni atoms (/2 = -1 .7 cm-1).
	Reference	Z. Naturforsch. 51b, 665—670 (1996); received October 20 1994
	Published	1996
	Keywords	X-Ray, Linear Trinuclear Nickel Complex, Magnetic Properties, Antiferromagnetic Coupling
	Similar Items	Find
	DEBUG INFO
	TEI-XML for	default:Reihe_B/51/ZNB-1996-51b-0665.pdf
	Identifier	ZNB-1996-51b-0665
	Volume	51

113	Author	Silke Busche, Karsten Bluhm	Requires cookie*
	Title	Synthese und Kristallstruktur von Lanthanoidzinkboraten L n Z n ^ O jo) mit Ln = Ce, Nd, Tb Synthesis and Crystal Structure o f Rare Earth Zinc Borates LnZn(B5O ]0) with Ln = Ce, Nd, Tb
	Abstract	Single crystals o f the new compounds LnZn(B5O \|0) (Ln = (A) C e3+, (B) N d3+, (C) T b '+) were obtained by using a B 20 3 flux technique. X-ray investigations led to space group C2h-P 2,/n (Nr. 14) with lattice parameters: (A) a = 874.5(1), b = 761.4(1), c = 950.0(1), ß = 92.80(1)°, (B) a = 868.6(2), b = 760.9(2), c = 946.0(2), 0 = 92.9 9 (2)°, (C) a = 858.2(2), b = 760.5(2), c = 939.3(2), ß = 93.56(2)°, Z = 4. The structure is isotypic with C oSm (B 5 O \|0) and is characte rized by two-dimensional infinite 2 (B 5 O 10)5_ ions. Ln is tenfold coordinated by oxygen, and Zn2+ occupies distorted Z n 0 6 polyfiedra.
	Reference	Z. Naturforsch. 51b, 671—6 (1996); eingegangen am 26. Oktober 1995
	Published	1996
	Keywords	Rare Earth, Zinc, Borate, Crystal Structure
	Similar Items	Find
	DEBUG INFO
	TEI-XML for	default:Reihe_B/51/ZNB-1996-51b-0671.pdf
	Identifier	ZNB-1996-51b-0671
	Volume	51

114	Author	Karsten Bluhm, Andre Wiesch	Requires cookie*
	Title	Synthese und Kristallstruktur von NiHo2(B20 5)2, das erste Nickellanthanoidborat mit einem ^ (B 20 5)4"-Anion Synthesis and Crystal Structure of NiHo2(B20 5)2, the First Nickel Lanthanoid Borates with a (^ (B 20 5)4" A nion
	Abstract	Single crystals o f N iH o2(B20 5) 2 were prepared by a B20 3 flux-technique in high temperature reactions at 1450 °C and investigated by X-ray diffraction. They crystallize in the space group C 2h-P 2 ,/c (Nr. 14) with a = 451.0(4); b = 724.8(3); c = 938.8(6) pm; ß = 9 1 ,39(1)°; Z = 2. The compound is isotypic to CuTb2(B20 5) 2 as well as to the gadolinite structure (F eY 2 (B e S i0 5)2) and contains a two dimensional infinite anion with the formula 2 (B 2 0 5)4~. The borate layers consist o f four-and eight-membered rings o f edge-sharing B 0 4 tetrahedra. The layers are connected via copper-centered elongated oxygen-octahedra and slightly distorted tetragonal H o 0 8 antiprisms.
	Reference	Z. Naturforsch. 51b, 677 (1996); eingegangen am 9. November 1995
	Published	1996
	Keywords	N ickel, Holmium, Borate, Synthesis, Crystal Structure
	Similar Items	Find
	DEBUG INFO
	TEI-XML for	default:Reihe_B/51/ZNB-1996-51b-0677.pdf
	Identifier	ZNB-1996-51b-0677
	Volume	51

115	Author	Max Herberhold, Guo-Xin Jina, ArnoldL. Rheingoldb	Requires cookie*
	Title	Sulfur and Selenium Complexes of the Hydrido-tri(3,5-dimethyl-l- pyrazolyl)borate Nitrosylmolybdenum Fragment, [TpMo(NO)]. An X-Ray Crystal Structure Determination of TpMo(NO)(Se5)
	Abstract	The reactions of hydrido-tri(3,5-dimethyl-l-pyrazolyl)borate nitrosylmolybdenum diiodide, TpMo(NO)L (2), with the oligochalcogenides (N H ^Sio and (NEuteSeö in THF solution lead to mononuclear cvc/o-pentachalcogenido complexes, TpMo(NO)(E5) (E = S (3a), Se (3b)). In the presence of either H2S or H^Se (generated by slow "in situ" hydrolysis of AI2E3 in moist THF solution) 2 is converted into binuclear chalcogenido-bridged products, Tp2Mo2(NO)2(//-E)2 (E = S (4a), Se (4b)) which are more conveniently obtained from 3a,b by dechalcogenation with tri(''butyl)phosphane (1:4,5). The new chalcogen complexes 3a,b and 4a,b were characterized by IR, NMR and mass spectroscopy and compared with the related chalcogen compounds derived from pentamethylcyclopentadienyl nitrosylmolybdenum diiodide, CpMo(NO)l2. The molecular structure of TpMo(NO)(Ses) (3b) has been determined; the complex contains a six-membered MoSe«; metallacycle in the chair conformation and a linearly coordinated nitrosyl ligand (angle M o -N -0 178.9(17)°).
	Reference	Z. Naturforsch. 51b, 681—685 (1996); received August 28 1995
	Published	1996
	Keywords	Molybdenum-chalcogenido Complexes, Nitrosyl Compounds, X-Ray
	Similar Items	Find
	DEBUG INFO
	TEI-XML for	default:Reihe_B/51/ZNB-1996-51b-0681.pdf
	Identifier	ZNB-1996-51b-0681
	Volume	51

116	Author	Manfredo Hörner, Gilberto Antonio, Johannes Pedrosoa, Joachim Beckb, Strähle0	Requires cookie*
	Title	Synthese und Struktur von
	Abstract	A g ^ P h ^ ^ Q H ^ C e n ^ , einem vierkernigen Silber(I)komplex mit l,2-Bis(phenyltriazenido)benzol als Ligand Synthesis and Structure o f A g ^ C P h N ^ C ö R i^ e n h , a Tetranuclear Silver(I) Complex with l,2-Bis(phenyltriazenido)benzene as Ligand Silver(I) Complex, 1,2-Bis(phenyltriazenido)benzene Ligand, Synthesis, Crystal Structure Ag4[(PhN;02C6H4]2(en)2 is obtained by the reaction of [Ag(NHj)2]+ with 1,2-bis-(phenyltriazeno)benzene and ethylenediamine. It crystallizes in the monoclinic space group P2i/c with a = 1064.9(2), b = 2041.8(3), c = 1008.5(3) pm, ß = 101.37(2)°, Z = 2. In the centrosymmetrical tetranuclear complex, the four Ag+ ions form a zigzag chain with Ag-Ag distances of 293.34 and 280.42 pm. Ethylenediamine molecules chelate the two terminal Ag atoms of this chain. Each of the 1,2-bis(phenyltriazeno)benzene ligands in the deprotonated bis(triazenido) form [(PhN^CöPL]2-is bridging three Ag+ ions. The Ag+ ions are coordinated by three N atoms in a trigonal planar arrangement with Ag-N distances between 214.0 and 241.2 pm.
	Reference	Z. Naturforsch. 51b, 686—690 (1996); eingegangen am 23. Oktober 1995
	Published	1996
	Similar Items	Find
	DEBUG INFO
	TEI-XML for	default:Reihe_B/51/ZNB-1996-51b-0686.pdf
	Identifier	ZNB-1996-51b-0686
	Volume	51

117	Author	W. Lübbe, W. Preetz	Requires cookie*
	Title	undm-[(w-C4H9)4N][B6H5(CH2)2C6H4]
	Abstract	Preparation, n B, 13C, 'H NM R Spectra and Vibrational Spectra o f 1,2-Xylylene-pentahydro-c/oso-hexaborate, cw-[B6H5(CH2)2C6H4]_ , and the Crystal Structures o f c/s-[P(C6H5)4][B 6H5(CIL,)2C6H4] and c/s-[(n-C4H9)4N ][B 6H5(CH2)2C6H4] 1,2-Xylylene-pentahydro-c/oso-hexaborat(1 -), ' By reaction of [B6H6]2-with u>,u/-dibromo-o-xylene in acetonitrile the 1,2-xylylene-pentahydro-c/oso-hexaborat, ds-[B 6H5(CH2)2C6H4]_ , is formed. The new ansa compound has been separated from excess [B6H6]2-and other reaction products by ion exchange chromatogra phy on diethylaminoethyl cellulose. The crystal structures of c/s-[P(C6H5)4][B6H5(CH2)2C6H4] (I) and as-[(n-C4H9)4N][B6H5(CH2)2C6H4] (II) have been determined by single crystal X-ray diffraction analysis: I is monoclinic, space group P 2 \/n with a = 13.715(5), b = 11.118(1) and c = 19.702(2) A, ß = 103.47(2)°; II is orthorhombic with a = 10.204(7), b = 13.352(4) and c = 20.824(8) A. The "B NMR spectrum confirms the structure with a hetero disubstituted octahedral B6 cage with local C2v symmetry. The l3C and 'H NMR spectra have been assigned in term of such a configuration. The IR and Raman spectra exhibit characteristic CH, BH, BC, B6 and arene vibrations.
	Reference	Z. Naturforsch. 51b, 691—697 (1996); eingegangen am 25. August 1995
	Published	1996
	Keywords	H NMR Spectra, Vibrational Spectra, 13C NMR Spectra, 11B NMR Spectra
	Similar Items	Find
	DEBUG INFO
	TEI-XML for	default:Reihe_B/51/ZNB-1996-51b-0691.pdf
	Identifier	ZNB-1996-51b-0691
	Volume	51

118	Author	Angeline Stier, Klaus-Jürgen Range	Requires cookie*
	Title	Dicyanometallate, VII [1] Darstellung und Kristallstruktur von Gadolinium-tris-dicyanoaurat (I), Gd[Au(CN)2]3-2,3H20 Dicyano Metallates, VII [1] Preparation and Crystal Structure o f Gadolinium-tris-dicyanoaurate (I), Gd[Au(CN)2]3 -2,3H20
	Abstract	The title compound has been prepared by adding a stoichiometric amount of gadolinium nitrate hexahydrate to an aqueous solution of potassium dicyanoaurate(I). Single crystals could be obtained by slow evaporation from the saturated solution. The compound crystallizes hexa-gonally, space group P-62m, with a = 6.6319(6), c = 9.108(2) Ä, c/a = 1.3734 and Z = 1. The structure comprises layers of considerably bent dicyanoaurate groups. The gold atoms form a nearly regular 3.6.3.6 -Kagome net with a layer sequence AA.. and an Au -Au distanceoof 3.316(2) A, i. e. remarkably shorter than that found in KAu(CN)2 (Au -Au = 3.652(1) Ä). Above and below the gold layers, the terminal nitrogen atoms of the dicyanoaurate groups build up a two-dimensional net work in the a,b plane, thereby creating trigonal-prismatic holes, which are occupied by the gadolinium ions. Up to three water molecules per unit cell complete the coordination sphere around the gadolinium ion to form a tricapped trigonal prism. The analogous compounds with Ln = Sm, Eu, Tb and Dy are obviously isostructural with the Gd compound, as can be inferred from preliminary X-ray studies.
	Reference	Z. Naturforsch. 51b, 698—702 (1996); eingegangen am 13. Oktober 1995
	Published	1996
	Keywords	Gadolinium-fm-dicyanoaurate(I), Preparation, Crystal Structure
	Similar Items	Find
	DEBUG INFO
	TEI-XML for	default:Reihe_B/51/ZNB-1996-51b-0698.pdf
	Identifier	ZNB-1996-51b-0698
	Volume	51

119	Author	Wolfram Uhlig, Herrn	Requires cookie*
	Title	Zur Darstellung neuer Polysiline und vernetzter Polysilane Synthesis of Novel Polysilynes and Branched Polysilanes
	Abstract	The reductive coupling of halogenated oligosilanes with potassium-graphite leads to novel polysilynes and branched polysilanes. The ratio of quarternary silicon atoms, monoorganosilyl-and diorganosilylgroups in the polymers can be modified by variation in the structure of the starting materials. In this way the properties of the preceramic polymers (molecular weights, solubility, content of carbon, degree of cross-linking) are influenced. The compounds are characterized by 29Si NMR spectroscopy.
	Reference	Z. Naturforsch. 51b, 703—710 (1996); eingegangen am 18. Dezember 1995
	Published	1996
	Keywords	Polysilanes, Polysilynes, Silyltriflates, Potassium-graphite
	Similar Items	Find
	DEBUG INFO
	TEI-XML for	default:Reihe_B/51/ZNB-1996-51b-0703.pdf
	Identifier	ZNB-1996-51b-0703
	Volume	51

120	Author	Na2z, New Sodium, ZincateD. Trinschek, M. Jansen	Requires cookie*
	Title	Na2Zn02, ein neues Natriumzinkat
	Abstract	By reacting Na20 , which was produced in situ from NaN3 and NaN02, with reactive ZnO in the solid state, the synthesis of Na2Z n02 has been achieved. Na2Zn02 is metastable up to about 750°C. The novel sodium zincate crystallizes in the spaceogroup P2,/c (No. 14) with the lattice parameters a = 7.7352(2), b = 5.9782(2), c = 5.7248(2)Ä, ß = 94.934(3)°, Z = 4. According to a single crystal structure determination it is an representative of the anti type of the Ln2S20 (Ln = Er, Tm, Yb, Dy) structure.
	Reference	Z. Naturforsch. 51b, 711—714 (1996); eingegangen am 10. August 1995
	Published	1996
	Keywords	Sodium Zincates, Crystal Structure, Metastability
	Similar Items	Find
	DEBUG INFO
	TEI-XML for	default:Reihe_B/51/ZNB-1996-51b-0711.pdf
	Identifier	ZNB-1996-51b-0711
	Volume	51

6