| | 1 | Author
| Peter Dehnert, Joseph Grobe, Due Le Van | Requires cookie* | | | Title
| Perfluormethyl-Element-Liganden, XXTV [I]* Organozinnverbindungen als Reagenzien, DI [2] Spaltungsreaktionen der Element-Element-Bindung in Verbindungen des Typs RnE-ERTO (R = CH3, CF3-E =P, AS, Se, Te * n,m = l, 2)  | | | | Abstract
| A systematic study of the cleavage of element-element bonds in compounds of the type R"E-ERm (R = CH3, CF3; E = P, As, S, Se, Te; n,m = 1, 2) by the group IV A element hydrides Me3M'H (M' = Si, Ge, Sn; Me — CH3) has been carried out. To evaluate the reaction pathway, for a number of compounds the attack of H2O, CH3OH, HBr and HI has been investigated. Possible reaction intermediates have been synthesized by in-dependent routes and tested under comparable conditions. | | | |
Reference
| (Z. Naturforsch. 36b, 48—54 [1981]; eingegangen am 14. August 1980) | | | |
Published
| 1981 | | | |
Keywords
| Organoelement-Element Compounds, Perfluoromethyl Derivatives, NMR Spectra | | | |
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| default:Reihe_B/36/ZNB-1981-36b-0048.pdf | | | | Identifier
| ZNB-1981-36b-0048 | | | | Volume
| 36 | |
| 3 | Author
| Willy Gombler | Requires cookie* | | | Title
| NMR-spektroskopische Untersuchungen an Chalkogenverbindungen, II [1] 12o Te-, 77 Se-, 19 F-und 13 C-chemische Verschiebungen von CF3-substituierten Selen-und Tellurverbindungen [2] NMR Spectroscopic Studies on Chalcogen Compounds, II [1] 125 Te, 77 Se, »F and * 3 C Chemical Shifts of CF3 Substituted Selenium and Tellurium Compounds [2] | | | | Abstract
| 77 Se chemical shifts of compounds CF3SeX exhibit an extraordinary good linear correla-tion with Huggins' electronegativities of X, %x-A range of 1051 ppm is covered for yx values between 1.9 and 3.15. Effective electronegativities are derived from the <5(77 Se) values. For some compounds unexpected 77 Se chemical shifts are found. This indicates an uncommon electronic constitution at selenium. Electron excitation energies are reported for some of the compounds and their importance for the paramagnetic shielding term is discussed. The relative shieldings of the tellurium compounds are analogous to those of the corresponding selenium compounds. In contrast to 77 Se, the 19 F shieldings of CF3EX compounds (E = chalcogen) depend inversely on the electronegativity of E and X. The 13 C chemical shifts do not correlate with the xx values. NMR data of some CF3Se(IV) and CF3Te(IV) compounds are also reported for comparison. | | | |
Reference
| Z. Naturforsch. 36b, 535—543 (1981); eingegangen am 21. Januar 1981 | | | |
Published
| 1981 | | | |
Keywords
| NMR Spectra, Trifluoromethyl Group, Selenium, Tellurium | | | |
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| default:Reihe_B/36/ZNB-1981-36b-0535.pdf | | | | Identifier
| ZNB-1981-36b-0535 | | | | Volume
| 36 | |
| 4 | Author
| -), Cyclotetra, Phosphazane, Werner Zeiß, Tino Kuhn, Dieter Lux, Wolfgang Schwarz, Heinz Hess | Requires cookie* | | | Title
| (MePNMe)4 Mel und (MePNMe)4 2 Mel, ein Cyclotetra(A 3 .A 3 .A 3 .A 5 -) und ein Cyclotetra(A 3 .A 5 .A 3 .A 5 -phosphazan) (MePNMe)4 * Mel and (MePNMe)4 * 2 Mel, a Cyclotetra | | | | Abstract
| (2) with three P 111 and one P v , and (3) with two P In and P v atoms are prepared from 1 with methyl iodide. NMR spectra of 2 are compared with those of the recently prepared [1] 4. The crystal structure of 3 shows the molecule to have a crystallographic inversion centre. Thus cis-trans isomerisation must have taken place during the working up procedure. Alkylation has severe consequences on bond distances and bond angles of the cyclotetraphosphazane ring system, in contrast to M(CO)s complexation at the same positions as shown in a similar case recently [8]. | | | |
Reference
| Z. Naturforsch. 36b, 561—565 (1981); eingegangen am 9. Dezember 1980 | | | |
Published
| 1981 | | | |
Keywords
| Cyclotetraphosphazanes, NMR Spectra, Crystal Structure Cyclotetraphosphazanes | | | |
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| default:Reihe_B/36/ZNB-1981-36b-0561.pdf | | | | Identifier
| ZNB-1981-36b-0561 | | | | Volume
| 36 | |
| 5 | Author
| Ertugrul Arpac, Lutz Dahlenburg | Requires cookie* | | | Title
| Oligophosphin-Liganden, III [1] Bis(3-diphenylphosphinopropyl)phenylphospbinchloroiridium(I) * * und dessen Carbonyl-und Hydridderivate Oligophosphine Ligands, III [1] Bis(3-diphenylphosphinopropyl)phenylphosphinechloroiridium(I) and its Carbonyl and Hydride Derivatives | | | | Abstract
| The title complex, IrCl(bdpp) (1), where bdpp = PhP[(CH2)3PPh2]2, has been obtained from [IrCl(C8Hi4)2]2 and the triphosphine ligand. Characteristic 31 P NMR data of 1 dissolved in THF are <5(PPh2) = 2.7 and <3(PPh) = —19.9 with cis-2 J(PIrP) = 32.8 Hz. Reaction of 1 with CO proceeds stepwise to yield five-coordinate IrCl(CO)(bdpp) (2) and ionic [Ir(CO)2(bdpp)]Cl (3). A trigonal bipyramidal geometry with equatorial CO ligands is assigned to the cation of 3 on the basis of its v(CO) infrared intensities. When allowed to react with HCl, 1 gives the monohydride IrHCl2(bdpp) (4). Similarly, the dihydride IrH2Cl(bdpp) (5) is formed from 1 and H2. As has been established by IR and NMR spectroscopy, 4 and 5 adopt cis-wer-octahedral structures. | | | |
Reference
| Z. Naturforsch. 36b, 672—676 (1981); eingegangen am 9. März 1981 | | | |
Published
| 1981 | | | |
Keywords
| Bis(3-diphenylphosphinopropyl)phenylphosphine, Iridium Complexes, NMR Spectra | | | |
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| default:Reihe_B/36/ZNB-1981-36b-0672.pdf | | | | Identifier
| ZNB-1981-36b-0672 | | | | Volume
| 36 | |
| 6 | Author
| Römer, H. Scholl, H. Budzikiewicz, H. Korth, G. Pulverer | Requires cookie* | | | Title
| A | | | | Abstract
| The structure elucidation of several minor phenazine pigments of Pseudomonads is described. 4-Hydroxyphenazine-l,6-dicarboxylic acid dimethyl ester, 2,3-dihydroxy-phenazine, 2,3,7-trihydroxyphenazine, 4-hydroxyphenazine-l-carboxylic acid, 2,3-di-hydroxyphenazine-l-carboxylic acid, 2,6-dihydroxyphenazine-l-carboxylic acid and 2,3,7-trihydroxyphenazine-l,6-dicarboxylic acid are new phenazine derivatives. The distribu-tion of phenazines in the genus Pseudomonas is investigated. | | | |
Reference
| Z. Naturforsch. 36b, 1037—1046 (1981); eingegangen am 27. März 1981 | | | |
Published
| 1981 | | | |
Keywords
| Phenazines, Bacterial Constituents, Pseudomonads, NMR Spectra, IR Spectra | | | |
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| default:Reihe_B/36/ZNB-1981-36b-1037.pdf | | | | Identifier
| ZNB-1981-36b-1037 | | | | Volume
| 36 | |
| 7 | Author
| Trimethylsilyl Tetrafluorotellurates, Vi, Benno Bildstein, Walter Tötsch, Fritz Sladky, E-F=. Me, E-R | Requires cookie* | | | Title
| Trimethylsüyl-tetrafluorotellurate(VI) | | | | Abstract
| The interaction of MesSiCl with eis-and trans-(HO)2TeF 4 and eis-and £ran.s-HOTeF 4 OCH 3 yields eis-and trans-(Me3SiO)2TeF 4 and eis-and <rans-Me3SiOTeF 4 OCH3, respectively, which have been characterized by NMR spectroscopy (125 Te, 29 Si, 19 F, X H). Die Trimethylsilylgruppe ist eine häufig verwen-dete Abgangsgruppe in Reaktionen mit Fluoriden: | | | |
Reference
| Z. Naturforsch. 36b, 1542—1543 (1981); eingegangen am 22. Juli 1981 | | | |
Published
| 1981 | | | |
Keywords
| Synthesis, Trimethylsilyl Tetrafluorotellurates(VI), NMR Spectra | | | |
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| default:Reihe_B/36/ZNB-1981-36b-1542.pdf | | | | Identifier
| ZNB-1981-36b-1542 | | | | Volume
| 36 | |
| 8 | Author
| Edgar Niecke, Anke Nickloweit-Lüke, Reinhold Rüger, Bernt Krebs, Helmut Grewe | Requires cookie* | | | Title
| .2A 3 .3A 3 -Azadiphosphiridine -Synthese, Kristallstruktur und Eigenschaften 1,2 A 3 ,3 x 3 -Azadiphosphiridines -Synthesis, Crystal Structure and Proj)erties | | | | Abstract
| 1,2 A 3 ,3 A 3 -Azadiphosphiridines are avaüable by elimination of hydrogenhalide from ß-and y-functional molecular frameworks and by 1 + 2 cycloaddition of phosphinidenes towards aminoiminophosphanes. In contrast to other three-membered phosphorus com-pounds, azadiphosphiridines decompose by 2 +1 cycloreversion to aminoiminophosphanes and phosphinidenes. The molecular structure of an azadiphosphiridine demonstrates the trans arrangement of the exocyclic ligands and the planarity of the endocyclic nitrogen. | | | |
Reference
| Z. Naturforsch. 36b, 1566—1574 (1981); eingegangen am 13. Juli 1981 | | | |
Published
| 1981 | | | |
Keywords
| Azadiphosphiridines, Cyclisation, Thermal Decomposition, NMR Spectra, Crystal Structure | | | |
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| default:Reihe_B/36/ZNB-1981-36b-1566.pdf | | | | Identifier
| ZNB-1981-36b-1566 | | | | Volume
| 36 | |
| 9 | Author
| OttoJ. Scherer, Heribert Jungmann | Requires cookie* | | | Title
| Phosphor-Ylid-Komplexe des Platins Phosphorus Ylide Complexes of Platinum | | | | Abstract
| The interaction of eis/trans-[Pt(PPI13) 2 (CH2CI)Cl] (1) with Ph 3 P gives the ylide complex cis-[Pt(PPh 3) 2 (CH 2 PPh 3)Cl]Cl (2), which forms cis-[Pt(PPh 3)(CH 2 PPh 3)Cl 2 ] (3) on heating in benzene. In CH 2 C1 2 , Ph 3 P is added again quanti-tatively with formation of 2. Irradiation of 3 with a 500 W lamp yields cw-Cl 2 Pt(PPh 3) 2 . The ylide complexes 4 and 6 were prepared by treatment of 3 with (Me2N) 3 P or Ph 3 As. 3 and Ph 2 P(CH 2) 2 PPh 2 form the chelate ylide com-plex 6. | | | |
Reference
| Z. Naturforsch. 36b, 1663—1665 (1981); eingegangen am 26. August 1981 | | | |
Published
| 1981 | | | |
Keywords
| Phosphorus Ylide Complexes, Synthesis, NMR Spectra | | | |
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| default:Reihe_B/36/ZNB-1981-36b-1663_n.pdf | | | | Identifier
| ZNB-1981-36b-1663_n | | | | Volume
| 36 | |
| 10 | Author
| Ekkehard Lindner, JuanCarlos Wuhrmann | Requires cookie* | | | Title
| Synthese und Stabilisierung von (Benzoyl-und Pentafluorbenzoyloxy)diphenyIphosphan und Vergleich mit den entsprechenden isomeren Aroyldiphenylphosphanoxiden Synthesis and Stabilization of (Benzoyl-and Pentafluorobenzoyloxy)diphenylphosphane and Comparison with the Corresponding Isomeric Aroyldiphenylphosphane Oxides | | | | Abstract
| (Benzoyloxy)-and (pentafluorobenzoyloxy)diphenylphosphanes RC(0)0PPh2 (2a, b) [R = C6H5 (a), C6F5 (b)] can be obtained by reaction of ClPPh2 (1) with Na02CC6H5 and Ag02CCeF5, respectively [eq. (1)]. Oxidation of 2a with molecular oxygen yields (benzoyl-oxy)diphenylphosphane oxide (3a) [eq. (2)]. The complexes (0C)5CrPPh20C(0)R (oa, b) are formed by the action of Na2OCC6Hs and Ag02CC6Fs, respectively on (OC)5CrPPh2Cl (4) [eq. (3)]. The chemical and spectroscopical properties of the (aroyloxy)diphenylphosphanes (2 a, b) are compared with the corresponding aryldiphenylphosphane oxides. | | | |
Reference
| Z. Naturforsch. 36b, 297—300 (1981); eingegangen am 28. November 1980 | | | |
Published
| 1981 | | | |
Keywords
| (Pentafluoro)(benzoyloxy)diphenylphosphanes, Pentacarbonylchromium Complexes, IR Spectra, NMR Spectra | | | |
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| default:Reihe_B/36/ZNB-1981-36b-0297.pdf | | | | Identifier
| ZNB-1981-36b-0297 | | | | Volume
| 36 | |
| 11 | Author
| OttoJ. Scherer, Herbert Conrad | Requires cookie* | | | Title
| New Phospha(III)azenes | | | | Abstract
| The interaction of RR'N-PC12 (1) with LiNR"SiMe3 gives monomeric phospha(IH)-azenes RR'N-P=N-R"; R = R"=i-C3H7, R'= (CH3)3C (3a); R=;-C3H7,R'=R" = (CH3)3C (3b); R = i-C3H7, R' = (CH3)3C, R"=(CH3)3Si (3 c) as distillable liquids. 3 a adds PC13 with formation of RR'N-PC1-NR-PC12, R = i-C3H7, R'=(CH3)3C (6). | | | |
Reference
| Z. Naturforsch. 36b, 515—517 (1981); eingegangen am 5. Februar 1981 | | | |
Published
| 1981 | | | |
Keywords
| Phospha(III)azenes, NMR Spectra, PCI3 -Addition, Amino -halo -phosphines | | | |
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| default:Reihe_B/36/ZNB-1981-36b-0515_n.pdf | | | | Identifier
| ZNB-1981-36b-0515_n | | | | Volume
| 36 | |
| 12 | Author
| Herbert Schumann, Heinrich Neumann | Requires cookie* | | | Title
| Organometallphosphin-substituierte Übergangsmetallkomplexe, XXVII [1] Reaktionen von Pentacarbonylmangan-und Pentacarbonylrheniumbromid mit Organoelement(rVb)phosphinen Organometalphosphine-Substituted Transition Metal Complexes, XXVII [1] Reactions of Pentacarbonylmanganese-and Pentacarbonylrheniumbromide with Organoelement(IVb) Phosphines | | | | Abstract
| The reactions of pentacarbonyl manganese bromide and pentacarbonyl rhenium bromide with di(ter£-butyl)trimethylsilyl phosphine, teri-butyl-bis(trimethylsilyl)-, -(germyl)-, -(stannyl) phosphine, as well as with tris(trimethylsilyl)-, -(germyl)-, and -(stannyl) phosphine result in the elimination of one CO ligand and the formation either of corresponding bromo-tetracarbonyl(organometalphosphine)manganese or -rhenium complexes or of corresponding octacarbonyl-bis(/z-organometalphosphido)dimanganese or -dirhenium complexes. The IR, NMR, and Mössbauer spectra are reported and discussed. | | | |
Reference
| Z. Naturforsch. 36b, 708—712 (1981); eingegangen am 27. Februar 1981 | | | |
Published
| 1981 | | | |
Keywords
| Organometal Phosphines, Tetracarbonylmanganese Complexes, Tetracarbonylrhenium Complexes, NMR Spectra, Mössbauer Spectra | | | |
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| default:Reihe_B/36/ZNB-1981-36b-0708.pdf | | | | Identifier
| ZNB-1981-36b-0708 | | | | Volume
| 36 | |
| 15 | Author
| Herbert Meier, Johannes Zountsas, Oswald Zimmer | Requires cookie* | | | Title
| | | | | Abstract
| A X H and 13 C NMR spectroscopical study is performed on the basis of 37 1,2,3-selena-diazoles. Besides the discussion of chemical shifts and coupling constants of X H and 13 C, selenium satellites were measured providing 1 H 77 Se and 13 C 77 Se coupling constants. | | | |
Reference
| Z. Naturforsch. 36b, 1017—1022 (1981); eingegangen am 16. April 1981 | | | |
Published
| 1981 | | | |
Keywords
| NMR Spectra, 1, 2, 3-Selenadiazoles, 77 Se Coupling | | | |
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| default:Reihe_B/36/ZNB-1981-36b-1017.pdf | | | | Identifier
| ZNB-1981-36b-1017 | | | | Volume
| 36 | |
| 16 | Author
| Ekkehard Lindner, Claus-Peter Krieg, Sigurd Hoehne, Axel Rau | Requires cookie* | | | Title
| Darstellung und Eigenschaften von und Reaktionen mit metallhaltigen Heterocyclen, XXTTT [1] Untersuchungen zur P=S-heteroanalogen Cyclocotrimerisierung von Alkinen mit Nitrilen bzw. Isocyaniden Preparation and Properties of, and Reactions with, Metal-Containing Heterocycles, XXIII [1] Investigations on P=S-Heteroanalogous Cyclocotrimerization of Alkynes with Nitriles and Isocyanides, Respectively | | | | Abstract
| Structure of [(OC)4MnSP(CH 3)2]2, The dimanganadiphosphadithiacyclohexadiene [(OC)4MnSP(CH 3)2]2 (1) crystallizes in the H,C CH, \ / 3 / P =\ (OC).Mn Mn(CO), * \ / S=P /\ HjC CHj 1 /-PC CH * (OC)tMn I CH, * L Y\ CH, (OCULMn | CHj . CO \ ^ C" \R' L \ t-Bu C6H" C6H5 R'NC a b c PR'3 d R = C02CHJ 3a-d orthorhombic space group Pbca with Z = 4. Attempts to cyclotrimerize the intermediate | | | |
Reference
| Z. Naturforsch. 36b, 1487—1492 (1981); eingegangen am 28. Juli 1981 | | | |
Published
| 1981 | | | |
Keywords
| Isocyanide Complexes of Heteromanganacyclopentadienes, Mass Spectra, IR Spectra, NMR Spectra | | | |
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| default:Reihe_B/36/ZNB-1981-36b-1487.pdf | | | | Identifier
| ZNB-1981-36b-1487 | | | | Volume
| 36 | |
| 17 | Author
| H.-R Schulten | Requires cookie* | | | Title
| | | | | Abstract
| A combined 13 C nuclear magnetic resonance and field desorption mass spectrometric investigation of algae grown on 13 C02 has shown that the isotopic enrichment of amino acids extracted therefrom is neither uniform nor statistical. The use of these two indepen-dent techniques allows a new, detailed and accurate insight into the label distribution resulting from biosynthesis. The observed deviations from the statistical abundances are systematic. A system for classifying each member of the complex ensemble of isotopic species has been devised, so that the isotopomers may be ordered according to their relative probability of occurrence. | | | |
Reference
| Z. Naturforsch. 36b, 1289—1296 (1981); received May 20 1981 | | | |
Published
| 1981 | | | |
Keywords
| 13 C Enriched Amino Acids, Biosynthesis, Label Distribution, NMR Spectra, Field Desorption Mass Spectrometry | | | |
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| default:Reihe_B/36/ZNB-1981-36b-1289.pdf | | | | Identifier
| ZNB-1981-36b-1289 | | | | Volume
| 36 | |
| 18 | Author
| PeterM. Kaiser®, Reinhard Nesper, Karl-Friedrich Tebbe, Herbert Witzel»- | Requires cookie* | | | Title
| Pyridin-4-on-Nueleosid + : Stabilisierung der Struktur im Kristall und in wäßriger Lösung Pyridine-4-on Nucleoside: Stabilisation of the Structure in the Crystal and in Aqueous Solution | | | | Abstract
| C10H13NO5 • H2O is monoclinic, space group P2i with a = 773.7 pm, b = 814.6 pm, c= 932.6 pm, ß = 109.36° at 143 K, Z = 2. The crystal structure has been refined to R =0.031 with 1340 counter reflections. Features of this nucleoside include an orientation of the base at the glycosidic bond N(l)-C(l') in the anii-range (52.5°), a ribosyl moiety in the C(2')-endo(S) conformation and in contrast to many other nucleosides a trans arrange-ment at C(4')-C(5'). This unusual conformation is stabilized by a distinct H-bonding scheme including the water molecule and the oxygen of the adjacent pyridin-4-on ring system. NMR data indicate on the other side that in solution the conformation of the nucleoside is anti/g + similar to that of other pyrimidine nucleosides. The 5'-OH group replaces the water molecule in the crystal. The preferred anti position of the base cannot be explained by an interaction of H(2,6) of the base with the 5'-OH group or the C(4) oxygen. Both protons which couple with H(3,5) coalesce in a single sharp doublet. Water entropy seems to be the decisive factor for the stabilization of the anti/g+ conformation in aqueous solution. | | | |
Reference
| Z. Naturforsch. 36b, 1632—1639 (1981); eingegangen am 3. Juli 1981 | | | |
Published
| 1981 | | | |
Keywords
| Pyridine-4-on Nucleoside, X-ray, NMR Spectra, Conformational Differences, Water Entropy | | | |
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| default:Reihe_B/36/ZNB-1981-36b-1632.pdf | | | | Identifier
| ZNB-1981-36b-1632 | | | | Volume
| 36 | |
| 19 | Author
| Rudolf Hansel, Faeis Khaliefi, Andrew Pelter | Requires cookie* | | | Title
| 3.5-Dihydroxy | | | | Abstract
| 6.7.8-trimethoxyflavon aus Heiichrysum graveolens: Bestätigung der Konstitution Confirmation of the Structure of an Extractive from Helichrysum graveolens as 3,5-Dihydroxy-6,7,8-trimethoxyflavone | | | |
Reference
| Z. Naturforsch. 36b, 1171—1172 (1981); eingegangen am 12. Mai 1981 | | | |
Published
| 1981 | | | |
Keywords
| 3, 5-Dihydroxy-6, 7, 8-trimethoxyflavone, Isomeric a-Hydroxybenzalcumaranone, X ray, NMR Spectra | | | |
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| default:Reihe_B/36/ZNB-1981-36b-1171.pdf | | | | Identifier
| ZNB-1981-36b-1171 | | | | Volume
| 36 | |
|
