| | 101 | Author
| Detlef Geff | Requires cookie* | | | Title
| Imidazole Catalyzed Transformation of 2-Arylmethylperhydro-l,5,2-dioxazine- 3,6-diones into 4-Oxazolidinones  | | | |
Reference
| Z. Naturforsch. 38b, 531—534 (1983); eingegangen am 23. November 1982 | | | |
Published
| 1983 | | | |
Keywords
| 2 -Ary lmethy lperhydro -1, 5, 2 -dioxazine -3, 6-diones, Imidazole, Thermolysis, 4-Oxazolidinones, Glyoxylamides | | | |
Similar Items
| Find | | | DEBUG INFO
| | | | | TEI-XML for
| default:Reihe_B/38/ZNB-1983-38b-0531_n.pdf | | | | Identifier
| ZNB-1983-38b-0531_n | | | | Volume
| 38 | |
| 103 | Author
| Marianne Baudler, Jochen Hellmann, Thomas Schmidt | Requires cookie* | | | Title
| Beiträge zur Chemie des Phosphors | | | | Abstract
| The reaction of tris(bromo-ter£-butylphosphino)phosphane, P(£-BuPBr)3, with lithium aluminium hydride leads to the title compound P(£-BuPH)3 (1), which could be isolated in a pure state. 1 is the first partially substituted derivative of iso-tetraphosphane(6), P(PHs)3, and was characterized in all details. Because of the chirality of the Z-BuPH-groups, 1 forms two diastereomers with RRS(SSR)-and RRR(SSS)-configuration in a ratio of about 3:1. The conformation of both isomers, which could be deduced from the 31 P NMR parameters, is mainly determined by the steric situation of the molecule. | | | |
Reference
| Z. Naturforsch. 38b, 537—542 (1983); eingegangen am 23. Dezember 1982 | | | |
Published
| 1983 | | | |
Similar Items
| Find | | | DEBUG INFO
| | | | | TEI-XML for
| default:Reihe_B/38/ZNB-1983-38b-0537.pdf | | | | Identifier
| ZNB-1983-38b-0537 | | | | Volume
| 38 | |
| 105 | Author
| WolfPeter Fehlhammer, Wolfgang Beck | Requires cookie* | | | Title
| Cycloaddition von Schwefelkohlenstoff | | | | Abstract
| an die Azidliganden in (Ph3P)2Pd(N3)2 und [Co(N3)4] 2 ~ [1] Cycloaddition of Carbon Disulfide to the Azide Ligands of (Ph3P)2Pd(N3)2 and [Co(N3)4] 2 - Thiatriazolinethionato Complexes, Isotliiocyanato Complexes, Palladium(II), Cobalt(III) (Ph3P)2Pd(N3)2 reacts with CS2 by 1,3-dipolar cycloaddition to give the thiatriazoline-5-thionato complex (Ph3P)2Pd(N3CS2)2. From the reaction of [Ph4As]2[Co(N3)4] with CS2, the isotliiocyanato complex [Ph4As]2[Co(NCS)4] has been isolated, and the intermediate thiatriazoline-5-thionato complex [Ph4As]2[Co(N3CS2)4] could be detected by its electronic spectrum. | | | |
Reference
| Z. Naturforsch. 38b, 546—548 (1983); eingegangen am 25. Januar 1983 | | | |
Published
| 1983 | | | |
Similar Items
| Find | | | DEBUG INFO
| | | | | TEI-XML for
| default:Reihe_B/38/ZNB-1983-38b-0546.pdf | | | | Identifier
| ZNB-1983-38b-0546 | | | | Volume
| 38 | |
| 106 | Author
| Karl-Friedrich Tebbe, Roland Fröhlich | Requires cookie* | | | Title
| Untersuchungen an Polypseudohalogeniden, II [1] Darstellung und Kristallstruktur des Rubidiumdicyanotriiodids, Rb[I(ICN)2] Preparation and Crystal Structure of Rb[I(ICN)2] | | | | Abstract
| The new compound Rb[I(ICN)2] can be prepared in aqueous solution by simple addition of two mole equivalents of ICN to one formula unit Rbl. The solid is isotypic with CS[I(ICN)2] and crystallizes in the orthorhombic space group Pmmn with a = 16.246 A, b = 6.795 A, c = 4.397 A and Z = 2. The crystal structure has been solved from diffracto-meter data and refined to R = 0.035 for 313 observed reflections. The structure may be interpreted as a layer-like package of Rb+ cations and pentahalide-analogous anions [I(ICN2]~. The anionic groups are angular with symmetry mm 2 and y(I-I--I) = 128.69°, 0>(I--I-C) = 175.5°, <p(I-C-N) = 177°, d(I~-I) = 3.271 A, d(I-C) = 2.11 A, d(C-N) = 1.13 A. The cation is surrounded by a distorted cube of iodine atoms with a minimum distance d(Rb-I) = 3.775 Ä. Some additional results on the reactions of alkali halides and halogenocyans in different solvents are mentioned and compared with those described elsewhere. | | | |
Reference
| Z. Naturforsch. 38b, 549—553 (1983); eingegangen am 14. Februar 1983 | | | |
Published
| 1983 | | | |
Keywords
| Rubidiumdicyanotriiodide, Polypseudohalide, Pseudopentahalide, Crystal Structure | | | |
Similar Items
| Find | | | DEBUG INFO
| | | | | TEI-XML for
| default:Reihe_B/38/ZNB-1983-38b-0549.pdf | | | | Identifier
| ZNB-1983-38b-0549 | | | | Volume
| 38 | |
| 107 | Author
| New Monocyclic Acyloxyfluoroboranes, Herbert Binder, Walter Matheis, Hans-Jörg Deiseroth, Han Fu-Son, ProfH. Dr, W. Binder, Matheis | Requires cookie* | | | Title
| Über neue monocyclische Acyloxyfluoroborane 2.2.6.6-Tetrafluoro-1.4-dialkyl-1.3.5-trioxa-1.6-diboracyclohexene: Darstellung, Molekül-und Kristallstruktur | | | | Abstract
| Acyloxyfluoroboranes Trimeric alkoxydifluoroboranes (F2BOR)3 (2) react with organic acid anhydrides by substitution of a ring group OR forming monocyclic acyloxyfluoroboranes of the type 2,2,6,6-tetrafluoro-l,4-dialkyl-l,3,5-trioxa-2,6-diboracyclohexene (3). The X-ray crystal structure determination of 3a shows two conformational isomers: two planar and two non-planar six-membered rings are present in the unit cell. The ring conformation is influenced by weak intermolecular H — F interactions. | | | |
Reference
| Z. Naturforsch. 38b, 554—558 (1983); eingegangen am 15. November 1982/26. Januar 1983 | | | |
Published
| 1983 | | | |
Keywords
| 6, 6-Tetrafluoro-l, 4-dialkyl-l, 3, 5-trioxa-2, 6-diboracyclohexenes: Synthesis, Molecular and Crystal Structure | | | |
Similar Items
| Find | | | DEBUG INFO
| | | | | TEI-XML for
| default:Reihe_B/38/ZNB-1983-38b-0554.pdf | | | | Identifier
| ZNB-1983-38b-0554 | | | | Volume
| 38 | |
| 108 | Author
| Ulrich Müller, Paul Klingelhöfer | Requires cookie* | | | Title
| /3-NbBr5, eine neue Modifikation von Niobpentabromid mit einer eindimensionalen Lagenfehlordnung ß-NbBrs, a New Modification of Niobium Pentabromide Having One-Dimensional Stacking Disorder | | | | Abstract
| While trying to react NbBrs with sulfur in a closed tube, crystals of the new modification /?-NbBra were obtained. Its X-ray diffraction patterns have sharp reflexions and diffuse streaks showing the presence of a one-dimensional disorder. From the sharp reflexions alone, a statistically averaged sub-structure results; it has the space group Ccmm and the lattice constants ao = 644, bo = 1867 and Co = 615 pm. Taking into account the diffuse streaks, the true structure was deduced; its lattice constants are a = 2ao, c = Co, b indefinite due to the disorder. /?-NbBrs is isostructural to tantalum pentaiodide. It consists of layers of (NbBrs)2 molecules that are stacked with displacement faults in the direction of b. The bromine atoms have a hexagonal close-packing arrangement. | | | |
Reference
| Z. Naturforsch. 38b, 559—561 (1983); eingegangen am 25. Januar 1983 | | | |
Published
| 1983 | | | |
Keywords
| Niobium Pentabromide, Crystal Structure, Stacking Faults | | | |
Similar Items
| Find | | | DEBUG INFO
| | | | | TEI-XML for
| default:Reihe_B/38/ZNB-1983-38b-0559.pdf | | | | Identifier
| ZNB-1983-38b-0559 | | | | Volume
| 38 | |
| 109 | Author
| BharatB. Kaul, D. Sellmann | Requires cookie* | | | Title
| Transition Metal Complexes with Sulfur Ligands, IV [1] Synthesis and Reactions of Mo (IV) Complexes with the Tetradentate Thioether-thiol Ligand 2,3,8,9-Dibenzo-l,4,7,10-tetrathiadecane | | | | Abstract
| Synthesis and characterization of non-oxo Mo(IV) complexes with the tetradentate thioether-thiol ligand 2,3,8,9-dibenzo-l,4,7,10-tetrathiadecane(dttd-H2) are reported. MoCl4(THF)2 reacts with dttd-H2 in THF at room temperature to give the paramagnetic (2.61 BM, 295 K) [Mo(dttd)Cl2]. The chlorine ligands in [Mo(dttd)Cl2] can be substituted by sulfur ligands yielding diamagnetic complexes as [Mo(dttd)(CeH4S2)], [Mo(dttd)(SC2HiS)] and [Mo(dttd)(SC2H5)2]; with Na2S, NaHS or H2S, the di-^-sulfido bridged complex [(dttd)Mo(S)2Mo(dttd)] is obtained. The reduction of [Mo(dttd)Cl2] by various reducing agents in the presence of CO or NO yields labile carbonyl and nitrosyl species in solution. In contrast to [Mo(dttd)Cl2], the complexes with MoSe cbromophores showed no reactivity to CO or NO under reducing conditions. | | | |
Reference
| Z. Naturforsch. 38b, 562—567 (1983); received January 19 1982 | | | |
Published
| 1983 | | | |
Keywords
| Molybdenum(IV) Sulfur Complexes, Synthesis, Reactions | | | |
Similar Items
| Find | | | DEBUG INFO
| | | | | TEI-XML for
| default:Reihe_B/38/ZNB-1983-38b-0562.pdf | | | | Identifier
| ZNB-1983-38b-0562 | | | | Volume
| 38 | |
| 110 | Author
| Thomas Mack, Karl Peters, Hans-Georg Von Schnering | Requires cookie* | | | Title
| Zur Stereochemie von Diazadien-Metall-Komplexen, V [1] Molekülstrukturen und CO-Kraftkonstanten nicht-starrer Chrom-, Molybdän- und Wolframcarbonylderivate DAD M(CO)3(*CO) (*C0 = 12 C0, 13 C0, C 18 0) Stereochemistry of Diazadiene Metal Complexes, V [lj Molecular Structures and CO Force Constants of Non-Rigid Chromium, Molybdenum and Tungsten Carbonyl Derivatives DAD M(CO)3(*CO) (*C0 = 12 CO, 13 C0, C 18 0) Heindirk torn Dieck | | | | Abstract
| Diazadiene metal tetracarbonyls, DAD M(CO)4, (M = Cr, Mo, W; DAD = R-N = CH-CH = NR with aliphatic and aromatic substituents R) show equi-distribution of one labelled CO when synthesized from fac-DAD M(CO)3(CH3CN) as a consequence of intramolecular CO site exchange. The structures of two Mo-complexes (1: R = iso-propyl; 2: R = 2,6-diisopropylphenyl) with DAD's of different bulkiness have been solved by X-ray methods. From the infrared solution spectra, including those of isotopically labelled (13 CO, C 18 0) compounds, all of the force constants ki, k2, ktt, kcc and kct bave been calculated independently. The ratios of interaction force constants deviate sharply from Cotton-Kraihanzel assumptions, perhaps because of the substantial deviation of the iraws-pair of CO groups from linearity (1: 154.5°, 2: 147.9°). The solid state N-Mo, Mo-C and C-0 bond lengths are neither in agreement with the generally accepted picture for donor/acceptor influences nor with typical IR data and force constant interpretations. (2 with higher v(CO) and ki, k2 has the longer CO bonds and shorter Mo-C bonds than 1.) The force constant sets have been used to calculate CO frequencies for over 60 labelled compounds with good accuracy (Av < 2 cm -1). | | | |
Reference
| Z. Naturforsch. 38b, 568—579 (1983); eingegangen am 3. Dezember 1982 | | | |
Published
| 1983 | | | |
Keywords
| Diazadiene Chromium, Molybdenum and Tungsten Carbonyls, X-Ray, Isotopically Labelled Carbonyls | | | |
Similar Items
| Find | | | DEBUG INFO
| | | | | TEI-XML for
| default:Reihe_B/38/ZNB-1983-38b-0568.pdf | | | | Identifier
| ZNB-1983-38b-0568 | | | | Volume
| 38 | |
| 112 | Author
| ErnstOtto Fischer, Rudolf Reitmeier | Requires cookie* | | | Title
| Übergangsmetall-Carben-Komplexe, CXXXI [1] | | | | Abstract
| Umsetzung von [(CO)5WCNEt2]BF4 mit anionischen Organylverbindungen von Elementen der V. Hauptgruppe Transition Metal Carbene Complexes, CXXXI [1] Reaction of [(CO)sWCNEt2]BF4 with Anionic Organyl Compounds of Group V Elements Transition Metal Carbene Complexes The cationic carbyne complex [(CO)5WCNEt2]BF4 (1) reacts with potassiumdiphenyl-amide, KNPI12, with nucleophilic addition of the amide anion to give (CO)5W[C(NEt2)NPh2] (2). The corresponding reactions with KPPh2, KPEt2, KPMePh, NaSbPh2 and NaBiPh2 yield the complex [(CO)5~W(CNEt2)]2 (3), which is formed by reductive dimerization of two carbyne fragments. In case of KPMePh the carbene complexes (CO)5\V[C(NEt2)PMePh (4) and £rans-(MePhPH)(CO)4W[C(NEt2)PMePh] (5) are also obtained. On warming in solution 1 1 | | | |
Reference
| Z. Naturforsch. 38b, 582—586 (1983); eingegangen am 4. Februar 1983 | | | |
Published
| 1983 | | | |
Similar Items
| Find | | | DEBUG INFO
| | | | | TEI-XML for
| default:Reihe_B/38/ZNB-1983-38b-0582.pdf | | | | Identifier
| ZNB-1983-38b-0582 | | | | Volume
| 38 | |
| 113 | Author
| Alexander Filippou, ErnstOtto Fischer | Requires cookie* | | | Title
| Übergangsmetall-Carbin-Komplexe, LXXIY [1] | | | | Abstract
| Synthese thermisch stabiler neutraler Carbin-Carbonyl-Komplexe von Chrom, Molybdän und Wolfram mit den zweizähnigen Liganden 2.2' -Bipyridyl und 1.10-Phenanthrolin Transition Metal Carbyne Complexes, LXXIV [1] Synthesis of Thermostable Neutral Carbyne Carbonyl Complexes of Chromium, Molybdenum, and Tungsten with the Bidentate Ligands 2,2'-Bipyridyl and 1,10-Phenanthroline trans -Bromo (organy lcarby ne) -(eis -dicarbony 1 (2,2' -bipyridyl) Metal Complexes, Chromium, Molybdenum, Tungsten | | | |
Reference
| Z. Naturforsch. 38b, 587—591 (1983); eingegangen am 17. Januar 1983 | | | |
Published
| 1983 | | | |
Similar Items
| Find | | | DEBUG INFO
| | | | | TEI-XML for
| default:Reihe_B/38/ZNB-1983-38b-0587.pdf | | | | Identifier
| ZNB-1983-38b-0587 | | | | Volume
| 38 | |
| 117 | Author
| Hans Bock, Sitki Aygen, Bahman Solouki | Requires cookie* | | | Title
| Gasphasen-Reaktionen, 35 [1] Benzseleniren als kurzlebiges Zwischenprodukt in der Pyrolyse von 1.2.3-Benzoselenodiazol zu 6-Fulvenselon Benzselenirene as Short-lived Intermediate in the Pyrolysis of 1,2,3-Benzoselenodiazole to 6-Fulvenselone | | | | Abstract
| In the pyrolysis of 1,2,3-benzoselenodiazole using a short-distance furnace, a short-lived intermediate is detected photoelectron spectroscopically. Mass spectra recorded under similar conditions suggest an isomer CöHiSe rearranging to the more stable final product 6-fulveneselone. The ionization pattern obtained by computerized spectra stripping is assigned to benzselenirene by molecular radical cation state comparison based on MNDO calculations. | | | |
Reference
| Z. Naturforsch. 38b, 611—615 (1983); eingegangen am 24. Januar 1983 | | | |
Published
| 1983 | | | |
Keywords
| PE Spectra, Short-lived Intermediates, Selenium Compounds | | | |
Similar Items
| Find | | | DEBUG INFO
| | | | | TEI-XML for
| default:Reihe_B/38/ZNB-1983-38b-0611.pdf | | | | Identifier
| ZNB-1983-38b-0611 | | | | Volume
| 38 | |
| 118 | Author
| Reinhold Tacke, Haryanto Linoh, Burghard Stumpf, Wolf-Rainer Abraham, Klaus Kieslich, Ludger Ernst | Requires cookie* | | | Title
| Mikrobiologische Umwandlung von Silicium-Yerbindungen: Enantioselektive Reduktion von Acetessigsäure-(trimethylsilylalkyl)estern und deren Carba-Analoga Microbiological Transformation of Silicon Compounds: Enantioselective Reduction of Trimethylsilylalkyl Acetoacetates and their Carba-Analogues | | | | Abstract
| The trimethylsilylalkyl acetoacetates 1 b and 2 b as well as their carba analogues 1 a and 2 a have been reduced microbiologically by Kloeckera corticis (ATCC 20109), leading to the corresponding (+)-3(£)-hydroxybutanoates 3b, 4b, 3a, and 4a. The enantiomeric purity was found to be 80% (3a, 3b, 4b) and 65% (4a), respectively. The reduction of lb and 2b is -to our knowledge -the first example for a controlled microbiological transformation of organosilicon substrates. | | | |
Reference
| Z. Naturforsch. 38b, 616—620 (1983); eingegangen am 8. Dezember 1982 | | | |
Published
| 1983 | | | |
Keywords
| Silicon Compounds, Microbiological Transformation, Enantioselective Reduction | | | |
Similar Items
| Find | | | DEBUG INFO
| | | | | TEI-XML for
| default:Reihe_B/38/ZNB-1983-38b-0616.pdf | | | | Identifier
| ZNB-1983-38b-0616 | | | | Volume
| 38 | |
| 119 | Author
| Ulrich Bayer, HansAlbert Brune | Requires cookie* | | | Title
| Untersuchungen über Substituenten-Einflüsse auf die reduktive Eliminierung des Biphenyl-Systems aus as-Bis(aryl)bis(triphenylphosphan)platin(II)-Verbindungen Influence of Substituents on the Reductive Elimination of the Biphenyl-System from cis-Bis(aryl)bis(triphenylphosphane)platinum(II) Compounds | | | | Abstract
| Compounds cis-[Pt(PPh3)2(3-X-C6H4)2] [X = F, Cl, CF3, CH30, (CH3)2N] and cis-[Pt(PPh3)2(3-X-C6H4)(Y-C6H4)] [X = F/Y = H, 4-F, 4-CF3, 4-CH30; X = Cl/Y = 4-F; X = CF3/Y = 4-F; X = CH3Ö/Y = 4-F] have been synthesized and studied thermally with respect to the reductive elimination of disubstituted biphenyls. Activation parameters A H+ and A S4= are reported and discussed. | | | |
Reference
| Z. Naturforsch. 38b, 621—631 (1983); eingegangen am 17. Januar 1983 | | | |
Published
| 1983 | | | |
Keywords
| Platinum-organic Compounds, Syntheses, Reductive Elimination, Activation Parameters | | | |
Similar Items
| Find | | | DEBUG INFO
| | | | | TEI-XML for
| default:Reihe_B/38/ZNB-1983-38b-0621.pdf | | | | Identifier
| ZNB-1983-38b-0621 | | | | Volume
| 38 | |
|
