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1Author    Uwe KlingebielRequires cookie*
 Title    Reaktionen von Lithio-aminofluorsilanen mit Halogensilanen und Trimethylzinnchlorid Reactions of Lithio-aminofluorosilanes with Halogensilanes and Trimethyltinchloride  
 Abstract    Fluorosilanes react with lithium amides and organolithium compounds to give amino-fluorosilanes. (Lithioamino)fluorosilanes are formed by the reaction of aminofluoro-silanes with butyllithium depending on the steric influence and molecular stabilization of the ligands. These lithium salts react with halogensilanes and trimethyltin chloride with substitution. By LiF elimination the lithio-aminofluorosilane C6H5-SiF-NLiC(CH3)3-N(p-C6H4CH3Si(CH3)3) cyclisizes through a (2-j-2)cycloaddition and SiC-H-cleavage. 
  Reference    Z. Naturforsch. 33b, 521—526 (1978); eingegangen am 3. Januar/21. Februar 1978 
  Published    1978 
  Keywords    Lithio-aminofluorosilanes, Substitution, Cyclisation, NMR 
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 TEI-XML for    default:Reihe_B/33/ZNB-1978-33b-0521.pdf 
 Identifier    ZNB-1978-33b-0521 
 Volume    33 
2Author    Michael Börner, Rainer Müller, Heimich VahrenkampRequires cookie*
 Title    Arsenverbrückte zweikernige Mn(CO)4Br-Komplexe Arsenic Bridged Dinuclear Mn(C0)4Br Complexes  
 Abstract    In Mn(CO)öBr one or two CO groups could be replaced by Me2AsCl. From Me2AsCl-Mn(CO)4Br with carbonyl metalates, or from Mn(CO)sBr with organometal dimethylarsenides, the arsenic bridged dinuclear complexes L"M-AsMe2-Mn(CO)4Br with L"M = CrCp(CO)3, MoCp(CO)3, WCp(CO)3, and Mn(CO)5 were obtained. Upon attempts to convert these to metal-metal bonded compounds the Cr-As-Mn complex decomposed whereas the Mn-As-Mn complex was spontaneously converted to (CO)4Mn|>AsMe2, //-Br]Mn(CO)4. 
  Reference    Z. Naturforsch. 35b, 1391—1394 (1980); eingegangen am 25. Juni 1980 
  Published    1980 
  Keywords    Ligand Bridged Dinuclear Complexes, Substitution, Reactivity 
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 TEI-XML for    default:Reihe_B/35/ZNB-1980-35b-1391.pdf 
 Identifier    ZNB-1980-35b-1391 
 Volume    35 
3Author    FrancisL. Tanzella, Neil BartlettRequires cookie*
 Title    Quantitative Synthesis of (C6H5)2AsF2+AsF6-and (C6H5)2A8F3 via Interaction of Benzene with Arsenic Pentafluoride  
 Abstract    Benzene reacts quantitatively with AsFs to give (C6H5)2AsF2 + AsF6-, the first reported aryl or alkyl fluoroarsonium(V) salt. This reacts quantitatively with CsF to give (CeH5)2AsF3 and CsAsF6. Interaction of (C6H5)2AsF3 with AsF5 reconstitutes the fluoro-arsonium salt. Variable temperature 19 F NMR studies show (CÖHS^ASFS to be a rigid trigonal bipyramid, with the phenyl groups in equatorial positions. 
  Reference    Z. Naturforsch. 36b, 1461—1464 (1981); received May 18 1981 
  Published    1981 
  Keywords    Arylfluoroarsonium, Arsenic, Benzene, Substitution 
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 TEI-XML for    default:Reihe_B/36/ZNB-1981-36b-1461.pdf 
 Identifier    ZNB-1981-36b-1461 
 Volume    36 
4Author    Detlev Enterling, Uwe Klingebiel, Anton MelierRequires cookie*
 Title    Substitution und Ringkopplung am Cyclotrisilazan-System Substitution and Ring Coupling at the Cyclotrisilazane System  
  Reference    Z. Naturforsch. 33b, 527—532 (1978); eingegangen am 9. Januar/21. Februar 1978 
  Published    1978 
  Keywords    Cyclotrisilazanes, Substitution, Fluorosilanes, Ring Coupling, Borazine 
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 TEI-XML for    default:Reihe_B/33/ZNB-1978-33b-0527.pdf 
 Identifier    ZNB-1978-33b-0527 
 Volume    33 
5Author    Ernst Egert, Ursula Kliebisch, Uwe Klingebiel, Dieter SchmidtRequires cookie*
 Title    Cyclodi-und -trisilazane — Synthese, Reaktionen und Ringkopplungen Cyclodi-and -trisilazanes — Synthesis, Reactions and Ring Coupling  
 Abstract    Contrary to our expectations, a cyclotrisilazane is obtained instead of a cyclodisilazane by the reaction of the lithiated di-rerf-butyldiamino-silane with Hal 2 SiMe 2 . Mono-and disubstitution takes place in reactions of lithiated tetra-isopropyl cyclodisilazane with halogeno-silanes and -boranes. A disubstituted ring reacts with LiOC 4 H 9 -formed from LiC 4 H y and THF — to give an unsymmetrically substituted four-membered ring as proved by a crystal structure determination. Coupling of four-and six-membered rings occurs in the reaction of SiF-substituted and lithiated rings. 
  Reference    (Z. Naturforsch. 42b, 23—30 [1987]; eingegangen am 1. September 1986) 
  Published    1987 
  Keywords    Cyclosilazanes, Substitution, Ring Coupling, Crystal Structure 
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 TEI-XML for    default:Reihe_B/42/ZNB-1987-42b-0023.pdf 
 Identifier    ZNB-1987-42b-0023 
 Volume    42 
6Author    Stephan Von, B. Eckeratha, Ingo-Peter Lorenz, Riad Fawzib, M. Anfred, Steim AnnbRequires cookie*
 Abstract    p(C O)2M nN (Bz)C H 2CH2 , der erste einzähnig koordinierte A ziridin-K om plex C p(C O)2M nN (B z)C H 2C H 2, the First M ono-C oordinate A ziridine Com plex The photolytically induced CO-substitution reaction of CpM n(CO b with N-benzyl-aziridine leads to the first mono coordinate aziridine complex, Cp(CO)2MnN(Bz)CH2CH2. It is stable against thermal C2H4 elimination up to 135°C. No nitrene complexes {Cp(CO)2Mn}"NBz (/? = 1, 2) were detected. The X-ray structure analysis of Cp(CO)2MnN(Bz)CH2CH2 shows the intact three-membered ring ligand and the pyramidal configuration of the nitrogen atom. 
  Reference    Z. Naturforsch. 51b, 959—962 (1996); eingegangen am 12. Januar 1996 
  Published    1996 
  Keywords    N-Benzyl-aziridine, Substitution, Cymantrene, X-Ray 
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 TEI-XML for    default:Reihe_B/51/ZNB-1996-51b-0959.pdf 
 Identifier    ZNB-1996-51b-0959 
 Volume    51 
7Author    F. Köksal, İ. Kartal, B. KarabulutRequires cookie*
 Title    Electron Paramagnetic Resonance of Cu 2+ in KHC0 3 Single Crystals  
 Abstract    The electron paramagnetic resonance spectra of Cu 2+ doped KHC0 3 single crystals were studied at room temperature. The results indicate a substitutional entrance of the Cu 2+ ions in place of the magnetically inequivalent K + sites. The charge compensation is supposed to be fulfilled by proton vacancies. The hyperfine lines were well resolved and the 65 Cu hyperfine coupling tensors were also found. The ground state of Cu 2+ indicates the dominance of the d x i_ y 2 orbital and, therefore, elongation of the polyhedron, similar to a lengthened octahedron. 
  Reference    Z. Naturforsch. 54a, 177—179 (1999); received January 9 1999 
  Published    1999 
  Keywords    EPR, Cu 2+, Potassium Bicarbonate, Crystal Field, Substitution, Impurity 
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 TEI-XML for    default:Reihe_A/54/ZNA-1999-54a-0177.pdf 
 Identifier    ZNA-1999-54a-0177 
 Volume    54