TY - JOUR A1 - Tacke, Reinhold A1 - Bentlagem, A. A1 - Towart, R. A1 - Meyer, H. A1 - Bossert, F. A1 - Vater, W. A1 - Stoepe, K. T1 - Sila-Analoga von Nifedipin-ähnlichen 4-Aryl-2.6-dimethyl-1.4-dihydropyridin-3.5-dicarbonsäure-dialkylestern, I N2 - no abstract available KW - Chemie Y1 - 1980 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-82430 ER - TY - JOUR A1 - Finze, Maik A1 - Reiss, Guido J. A1 - Frohn, Hermann-Josef T1 - 2,3,5,6-Tetrafluoro-1,4-bis(trimethylsilyl)benzene N2 - no abstract available KW - Chemie KW - single-crystal X-ray study KW - T = 199 K KW - R factor = 0.027 KW - wR factor = 0.068 KW - data-to-parameter ratio = 14.0. Y1 - 2012 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-75401 ER - TY - JOUR A1 - Finze, Maik A1 - Reiss, Guido J. T1 - Trimethyl­sulfonium 1-amino-6-fluoro-2,3,4,5,7,8,9,10,11,12-decaiodo-1-carba-closo-dodeca­borate N2 - no abstract available KW - Chemie KW - single-crystal X-ray study KW - T = 100 K KW - wR factor = 0.052 KW - data-to-parameter ratio = 20.8 Y1 - 2012 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-75397 ER - TY - JOUR A1 - Braunschweig, Holger A1 - Arnold, Thomas A1 - Gruss, Katrin T1 - cyclo-Tri-mu-oxido-tris{[(eta 5,eta 5)-1,2-bis(cyclopentadienyl)-1,1,2,2-tetramethyldisilane]zirconium(IV)}: atrimeric disila-bridged oxidozirconocene N2 - no abstract available KW - Chemie KW - single-crystal X-ray study KW - T = 174 K KW - R factor = 0.027 KW - wR factor = 0.069 KW - data-to-parameter ratio = 23.6. Y1 - 2011 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-74737 ER - TY - JOUR A1 - Hoffmann, Gerhard Georg A1 - Burschka, Christian T1 - (I\(_2\)GaS-i-C\(_3\)H\(_7\))\(_2\), das erste butterfly-Molekül mit vierfach koordiniertem Gallium T1 - The first "butterfly" molecule with four-coordinate gallium. Synthesis and structure of (I\(_2\)GaS-i-C\(_3\)H\(_7\))\(_2\) N2 - No abstract available KW - Chemie KW - Gallium Y1 - 1985 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-31432 ER - TY - JOUR A1 - Burschka, Christian A1 - Stroppel, Klaus A1 - Jutzi, Peter T1 - Die Struktur von μ-Dibromgermandiyl-bis(pentacarbonylwolfram)(W-W) N2 - No abstract available KW - Chemie Y1 - 1981 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-31852 ER - TY - JOUR A1 - Wieber, M. A1 - Hoehl, H. A1 - Burschka, Christian T1 - Diphenylantimonalkoxide und -thiolate als Liganden in Metallcarbonylkomplexen des Chroms und Molybdäns; Kristallstruktur von Tris[diphenyl(phenylthiolato)stiban]molybdäntricarbonyl T1 - Diphenylantimony Alkoxides and Thiolates as Ligands in Carbonyl Complexes of Chromium and Molybdenum; Crystal Structure of Tris [diphenyl(phenylthiolato)stibane] Molybdenum Tricarbonyl N2 - Diorganoantimonverbindungen R\(_2\)SbX (R = C\(_6\)H\(_5\) X = S-Organyl, O-Organyl) reagieren mit Cycloheptatrienylmolybdäntricarbonyl zu Produkten des Typs [R\(_2\)SbX]\(_3\)Mo(CO)\(_3\). Die analogen Komplexe des Chroms können durch Reaktion von Tris(acetonitril) chromtricarbonyl mit den Antimon-Liganden dargestellt werden. (1,5-Cyclooctadien)molybdäntetracarbonyl reagiert unter Substitution mit Diorganoantimonderivaten R\(_2\)SbX (R = C\(_6\)R\(_5\), X = S-Organyl) zu den Verbindungen [R\(_2\)SbX]\(_2\)Mo(CO)\(_4\) Synthese und Eigenschaften der StibanKomplexe sowie die Kristallstruktur der Verbindung [(C\(_6\)H\(_5\))\(_2\)SbSC\(_6\)H\(_5\)]\(_3\)Mo(CO)\(_3\) werden beschrieben. N2 - Diorganoantimony compounds R\(_2\)SbX (R = C\(_6\)H\(_5\), X = S-organyl, O-organyl) react with cycloheptatrienemolybdenum tricarbonyl to yield products of the type [R\(_2\)SbX]\(_3\)Mo(CO)\(_3\). Analogous complexes of chromium are prepared by reaction oftris(acetonitrile)chromium tricarbonyl with the stibane Ugands. Tetracarbonyl-l,5-cyclooctadienemolybdenum undergoes substitution reaction with diorganoantimony compounds R\(_2\)SbX (R = C\(_6\)R\(_5\), X = S-organyl) to give [R\(_2\)SbX]\(_2\)Mo(CO)\(_4\) Synthesis and properties of the stibane complexes as weil as an X-ray determination of [(C\(_6\)H\(_5\))\(_2\)SbSC\(_6\)H\(_5\)]\(_3\)Mo(CO)\(_3\) are described. KW - Chemie Y1 - 1990 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-31919 ER - TY - JOUR A1 - Wieber, M. A1 - Walz, J. A1 - Burschka, Christian T1 - Organostibonsäureester. II [1]: Darstellung und Eigenschaften von Methanstibonsäureestern. Struktur von Di-μ-methoxy-bis[dibromo-methoxy-methyl-antimon(V)] N2 - Dimere alkoxyverbrückte Verbindungen des Typs [CH\(_3\)SbX\(_2\)(OR)(μ-OR)]\(_2\) (X = Cl, Br; R = CH\(_3\), C\(_2\)H\(_5\)) können durch Oxidation von CH\(_3\)Sb(OR)\(_2\) mit Br\(_2\) oder S0\(_2\)Cl\(_2\) in CH\(_2\)Cl\(_2\) unterhalb -60°C als lichtempfindliche kristalline Feststoffe erhalten werden. Die Struktur der Verbindung [CH\(_3\)SbBr\(_2\)(OCH\(_3\))(μ-OCH\(_3\))]\(_2\) konnte mittels Röntgenstrukturanalyse bestimmt werden. Umsetzungen mit Natriumalkoholaten in den entsprechenden Alkoholen bei 0°C führen zu dimeren Tetraalkoxymethylstiboranen. Austauschreaktionen von Tetramethoxymethylstiboran mit Ethanol ergeben das Ethoxyderivat und mit Diolen symmetrische spirocyclische Methanstibonsäureester. N2 - Dimeric alkoxy-bridged compounds of the type [CH\(_3\)SbX\(_2\)(OR)(μ-OR)]\(_2\) (X = Cl, Br; R = CH\(_3\), C\(_2\)H\(_5\)) are prepared by oxidation of CH\(_3\)Sb(OR)\(_2\) with Br\(_2\) or S0\(_2\)Cl\(_2\) in CH\(_2\)Cl\(_2\) below -60°C as light sensitive erystals. The structure of [CH\(_3\)SbBr\(_2\)(OCH\(_3\))(μ-OCH\(_3\))]\(_2\) was determined by X-Ray analysis. By reaction with sodium alkoxides in the corresponding alcohol at 0°C dimeric tetraalkoxymethylstiboranes are obtained. Exchange reactions of tetramethoxymethylstiborane with ethanol give the ethoxy derivative and with diols symmetrie spirocyclic esters of methanestibonic acid. KW - Chemie Y1 - 1990 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-31909 ER - TY - JOUR A1 - Kaupp, Martin A1 - Schleyer, P. v. R. A1 - Stoll, H. A1 - Preuss, H. T1 - Pseudopotential Approaches to Ca, Sr and Ba Hybrides. Why are some Alkaline Earth MX\(_2\) Compounds Bent? N2 - Quasirelativistic and nonrelativistic lo-valence-electronp seudopotentialsf or Ca, Sr, and Ba are presented. Results of calculations with 6s6p5d basis sets for MH, MH\(^+\) , and MH\(_2\), are compared with all-electron and 2-valence-electron pseudopotential calculations with and , without core-polarization potentials. The lo-valence-electron pseudopotential approach agrees well with all-electron calculations. It circumvents problems for the 2-valence-electron pseudopotentials arising from an incomplete separation of valence and subvalence shells in polar molecular systems due to strongly contracted occupied (n - 1 )-d orbitals. All higherlevel calculations show SrH\(_2\) and BaII\(_2\), to be bent with angles of - 140° and 120°, respectively, while CaH\(_2\) is linear with a flat potential-energy surface for the bending motion. The use of a core-polarization potential together with the 2-valence-electronp seudopotentiala pproach allows an investigation of the relative importance of core-polarization vs direct d-orbital bonding participation as reasons for the bent structures. The calculations strongly suggest that both contribute to the bending in SrH\(_2\) and BaII\(_2\). Even at the Hartree-Fock level of theory lovalence- electronp seudopotentialc alculations given reasonablea nglesw hen the potentialenergy surface is not exceedingly flat, and only moderately contracted basis sets including both compact d functions and diffuse p functions are used. The effect of core-valence correlation and the importance off functions also are discussed. KW - Chemie Y1 - 1991 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-31646 ER - TY - JOUR A1 - Kuehn, A. A1 - Burschka, Christian A1 - Werner, H. T1 - Synthesis and molecular structure of C\(_5\)H\(_5\)(P-/-Pr\(_3\))Pd(η\(^1\), η\(^3\)-C\(_3\)H\(_4\))Pd(P-/-Pr\(_3\))Br: a compound formed through insertion of allene into a metal-metal bond\(^1\) N2 - No abstract available KW - Chemie Y1 - 1982 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-46592 ER -