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1978 (361)
81Author    J. Gosseick, W. W. LötzRequires cookie*
 Title    Bentonit — ein Schichtsilikat — als Katalysator bei der elektrophilen aromatischen Substitution Bentonite, a Layered Silicate in Electrophilic Aromatic Substitution  
 Abstract    Bentonite is used as an heterogenous catalyst in the liquid-phase alkylation of benzene and toluene. Der Einsatz von Montmorillonit, einem in Schich-tengittern vorliegenden Aluminiumsilikat mit aus-tauschbaren Kationen, als Hochtemperatur-Kataly-sator für Alkylierungsreaktionen in der Gasphase ist seit längerem bekannt [1]. Im Rahmen unserer Untersuchungen über orga-nisch-chemische Reaktionsabläufe innerhalb zwei-dimensionaler Strukturen setzten wir Calcium-Bentonit -ein zu 78% aus Montmorillonit bestehen-des Aluminiumsilikat -als festen Katalysator in der flüssigen Phase ein. Als sich zeigte, daß Benzol und Brom bei 80 °C glatt in hoher Ausbeute (79%) Brombenzol ergaben, verwandten wir auch Alkyl-halogenide als Reaktionspartner von Aromaten. Mit Benzol erhielten wir monoalkylierte bzw. 1.4-dialkylierte Benzolderivate als Reaktionsprodukte, während mit Toluol als Monosubstitutionsprodukte 1.4-dialkylierte, daneben aber auch 1.3.5-trialky-lierte Benzole entstanden. Dabei ergab die Reaktion von Benzol mit den verschiedenen Butylbromiden eine deutliche 
  Reference    Z. Naturforsch. 33b, 346 (1978); eingegangen am 14. Dezember 1977 
  Published    1978 
  Keywords    Bentonite, Catalyst, Friedel-Crafts-Alkylation 
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 TEI-XML for    default:Reihe_B/33/ZNB-1978-33b-0346_n.pdf 
 Identifier    ZNB-1978-33b-0346_n 
 Volume    33 
82Author    ViqarUddin Ahmad, Anwer Basha, Wasimul Haque, H.E JRequires cookie*
 Title    New Alkaloids from Prosopis julißora DC  
 Abstract    Prosopis juliflora, Piperidine Alkaloids The isolation of three new alkaloids from Prosopis julifiora is reported. A structure for the minor alkaloid julifloridine is suggested. 
  Reference    Z. Naturforsch. 33b, 347—348 (1978); received October 21 1977 
  Published    1978 
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 Identifier    ZNB-1978-33b-0347_n 
 Volume    33 
83Author    Friedhelm Lötz, Udo Kraatz, Friedhelm KörteRequires cookie*
 Title    Zur Synthese seitenkettenhydroxylierter Tetrahydrocannabinol Synthesis of Side Chain Hydroxylated Tetrahydrocannabinols  
 Abstract    The potential Zl 8 -tetrahydrocannabinol meta-bolites (6 a, b) were synthesized starting from (+)-fmris-p-menthadien-(2,8)ol(l) (2) and the resorcyl-alkyl esters (3 a, b). 
  Reference    Z. Naturforsch. 33b, 349—350 (1978); eingegangen am 30. Dezember 1977 
  Published    1978 
  Keywords    Zl 8 -Cannabinoids, Side Chain Hydroxylation, Synthesis 
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 TEI-XML for    default:Reihe_B/33/ZNB-1978-33b-0349_n.pdf 
 Identifier    ZNB-1978-33b-0349_n 
 Volume    33 
84Author    Hans SchäferRequires cookie*
 Title    P-funktionell verbrückte Mangancarbonylkomplexe P-Functionally Bridged Manganese Carbonyl Complexes  
 Abstract    Mn(CO)sBr and (Me3Si)3P react to give Mn2(CO)8 (yuBr) (/UP(SiMe3)2) 3. Using methanol, both Si-P bonds of 3 can be cleaved, forming Mn2(CO)8 (//Br) (//PH2) 4. On dissolving 4 in CCI4 a P-H, C-Cl exchange reaction is observed, yielding Mn2(CO)8 (//Br) (^PC12). IR and NMR data are reported. Bei Untersuchungen über die Ligandeigenschaf-ten der Bis (trimethylsilyl)-Gruppe wurden 
  Reference    Z. Naturforsch. 33b, 351—352 (1978); eingegangen am 12. Dezember 1977 
  Published    1978 
  Keywords    Phosphido, Dichlorophosphido, Bis(trimethyl-silyl)phosphido Bridged Manganese Carbonyls, Phosphorus Bridge Substitution Reactions 
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 TEI-XML for    default:Reihe_B/33/ZNB-1978-33b-0351_n.pdf 
 Identifier    ZNB-1978-33b-0351_n 
 Volume    33 
85Author    Horst Seel, Rafet Ay, Harald GüntherRequires cookie*
 Title    3 C, 1 H-Spin-Spin Kopplungskonstanten Teil III: Naphthalin 13 C, 1 H Spin-Spin Coupling Constants Part III: Naphthalene  
 Abstract    13C NMR, Spin-Spin Coupling Using a newly developed technique that employs highly deuterated compounds and 2 H broadband decoupling the 13 C, 1 H spin-spin coupling constants for naphthalene have been measured from the 13 C NMR spectra of a-and /?-H-[T>7]naphthalene. A linear dependence of the 3 J(13 C, 1 H) data on the central 7r-bond order is indicated. 
  Reference    Z. Naturforsch. 33b, 353—354 (1978); eingegangen am 19. Dezember 1977 
  Published    1978 
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 TEI-XML for    default:Reihe_B/33/ZNB-1978-33b-0353_n.pdf 
 Identifier    ZNB-1978-33b-0353_n 
 Volume    33 
86Author    Marianne Baudler, Anna Marx, Josef HahnRequires cookie*
 Title    Beiträge zur Chemie des Phosphors, 80 [1] Über die Phosphor-Bor-Dreiringverbindung (f-BuP)2BN(i-Pr)2 Contributions to the Chemistry of Phosphorus, 80 [1] About the Phosphorus Boron Three-Membered Ring Compound (£-BuP)2BN(i-Pr)2  
  Reference    Z. Naturforsch. 33b, 355—360 (1978); eingegangen am 18. Januar 1978 
  Published    1978 
  Keywords    l, 2-Di-£e^butyl-3-di-iso-propylamino-l, 2, 3-diphosphaborirane, Heterocyclophosphanes, Three-membered Ring Compounds, Cyclo-3-bora-l, 2-diphosphanes, Diphosphaboracyclopropanes 
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 TEI-XML for    default:Reihe_B/33/ZNB-1978-33b-0355.pdf 
 Identifier    ZNB-1978-33b-0355 
 Volume    33 
87Author    Margret Sommer, Klaus Weidenhammer, Henning Wienand, ManfredL. ZieglerRequires cookie*
 Title    und die Röntgenstrukturanalyse von »? 6 -CH3-C-CH(CH3)-C7H7Mo(CO)3 II 0 Synthesis and Characterisation of the Species R-C7H7Mo(CO)3 and the X-ray Structure Determination of ^ 6 -CH3-C-CH(CH3)-C7H7Mo(CO)3 II 0  
 Abstract    Synthesis of R-C7H7Mo(CO)3, X-ray The species R-C7H7Mo(CO)3 (R=-CH2COCH3,-CH(CH3)COCH3,-CH(CH)(CH3)2COCH3) have been synthesized by electrolysing [^ 7 -C7H7Mo(CO)3] + , 7? 7 -C7H7Mo(CO)2Br and the dimers [C7H7Mo(CO)3]2 and (C7H7)2Mo(CO)3, respectively, in suitable ketones and HBr. *H NMR spectra and the X-ray structure determination of (CH3-CO-CH(CH3)-C7H7)Mo(CO)3 revealed the CH3-CO-CH(CH3)-group being bonded to the cycloheptatriene ligand via the a-carbon atom of the ethyl group. 
  Reference    Z. Naturforsch. 33b, 361—365 (1978); eingegangen am 30. Dezember 1977 
  Published    1978 
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 Identifier    ZNB-1978-33b-0361 
 Volume    33 
88Author    Dieter MesserRequires cookie*
 Title    Die Kristallstruktur yon RbGeCl3 The Crystal Structure of RbGeCl3  
 Abstract    Structure Determination, Trigonal Pyramidal Ions RbGeCb is prepared from RbCl and Ge(II) in 6 N HCl or by reaction of RbCl with HGeCl3. The compound crystallizes monoclinic, space group P2i/m, with a = 798.8, b = 694.1, c = 580.0 pm, ß = 106.34° and Z = 2. The crystal structure has been deter-mined by SHELX and refined till R = 0.067. RbGeCl3 is built up by Rb+ and pyramidal GeCl3~-units. The coordination of Ge and the anionic framework is discussed. 
  Reference    Z. Naturforsch. 33b, 366—369 (1978); eingegangen am 16. Januar 1978 
  Published    1978 
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 Identifier    ZNB-1978-33b-0366 
 Volume    33 
89Author    Gerhard Savelsberg, Herbert SchäferRequires cookie*
 Title    Ternäre Pnictide und Chalkogenide von Alkalimetallen und IB-bzw. IIB-Elementen On Ternary Pnictides and Chalkogenides of Alkaline Metals and IB-resp. II B-Elements  
 Abstract    The new compounds NaCuSe, NaCuTe, KCuSe, KCuTe and KZnP were prepared and their structures -together with those of KZnSb, NaCdSb and NaZnSb -determined. NaCuSe, NaCuTe and NaZnSb crystallize in a PbFCl type, while NaCdSb forms the awta'-PbCl2-structure. KCuSe, KCuTe, KZnP and KZnSb build up the Ni2ln-structure. 
  Reference    Z. Naturforsch. 33b, 370—373 (1978); eingegangen am 31. Januar 1978 
  Published    1978 
  Keywords    Intermetallic Compounds, Crystal Structure, Ternary Pnictides, Ternary Chalkogenides 
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 TEI-XML for    default:Reihe_B/33/ZNB-1978-33b-0370.pdf 
 Identifier    ZNB-1978-33b-0370 
 Volume    33 
90Author    Fritz Seel, Fritz SchinnerlingRequires cookie*
 Title    Darstellung und thermische Zersetzung von Erdalkalimetall-Carbamoylphospliaten Preparation and Thermal Decomposition of Carbamoylphosphates of Alkaline-earth Metals  
 Abstract    After the formation of carbamoylphosphate through the reaction of KH2PO4 with KNCO in aqueous solution, unreacted phosphate and carbamoylphosphate can be separated by fractional precipitation with barium (first step) and calcium or strontium or barium salt solutions (second step) at low temperatures. The carbamoylphosphates of the alkaline earth metals are decomposed above 100 °C to yield predominantly diphosphates and urea. In aqueous suspensions the decomposition proceeds even at room temperature. -The chemical shifts of the phosphorus atom of the carbamoylphosphate ion between pH 6.5 and 8.2 are given. 
  Reference    Z. Naturforsch. 33b, 374—381 (1978); eingegangen am 31. Januar 1978 
  Published    1978 
  Keywords    Carbamoylphosphates, Preparation, Decomposition, NMR 
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 Identifier    ZNB-1978-33b-0374 
 Volume    33 
91Author    Albrecht MewisRequires cookie*
 Title    AB2X2 Compounds with the CaAl2Si2 Structure, IV [1]  
 Abstract    The four ternary compounds CaZn2Sb2, CaCd2Sb2, SrZn2Sb2, and SrCd2Sb2 have been prepared and investigated by X-ray methods. They are isotypic and crystallize trigönally in a CaAl2Si2-type structure (space group P3ml-D3d) with the following constants: CaZn2Sb2 a = 4.441 ± 0.001 A, c = 7.464 ± 0.002 A; CaCd2Sb2 a = 4.649 ± 0.001 A, c = 7.597 ± 0.002 A; SrZn2Sb2 a = 4.500 ± 0.001 A, c = 7,716 ± 0.002 A; SrCd2Sb2 a = 4.709 ± 0.001 A, c = 7.822 ± 0.003 A. 
  Reference    Z. Naturforsch. 33b, 382—384 (1978); eingegangen am 23. Januar 1978 
  Published    1978 
  Keywords    Calcium Compounds, Strontium Compounds, 2 B-Elements, Antimonides, Crystal Structure 
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 TEI-XML for    default:Reihe_B/33/ZNB-1978-33b-0382.pdf 
 Identifier    ZNB-1978-33b-0382 
 Volume    33 
92Author    Bernd WrackmeyerRequires cookie*
 Title    Organoborierung von Alkinylstannanen, VI [1] Alienbildung bei einer Deorganoborierung Organoboration of Alkynylstannanes, VI [1] Formation of an Allene by Deorganoboration  
 Abstract    The thermal decomposition of some l,l-bis(trimethylstannyl)-2-dialkylborylalkenes leads unexpectedly to substituted allenes. The structural information is based on *H, 11 B, 13 C and 119 Sn NMR data and also on the strong IR band at 1882 cm" 1 . 
  Reference    Z. Naturforsch. 33b, 385—389 (1978); eingegangen am 18. Januar 1978 
  Published    1978 
  Keywords    Deorganoboration, Allenes, NMR 
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 TEI-XML for    default:Reihe_B/33/ZNB-1978-33b-0385.pdf 
 Identifier    ZNB-1978-33b-0385 
 Volume    33 
93Author    Cr Simionescu, S. Dumitriu, V. Bulacovschi, V. I. Popa, B. SimionescuRequires cookie*
 Title    Molekulare Reaktionen in kalten Methan-Wasser-Plasmen und die Wirkung von UV-Bestrahlung Molecular Reactions in Cold Methane-Water Plasma and the Effect of UV Irradiation  
 Abstract    After passage of methane-water mixtures through the state of a cold plasma, numerous products were identified, especially aldehydes, ketones, alcohols and acids. Their concen-tration was dependent on the methane/water ratio. Irradiation with UV light during or after the process gave transformations of the above compounds to more complex combi-nations. For the formation of ketones, aldehydes, alcohols and acids a detailed mechanism is proposed. 
  Reference    Z. Naturforsch. 33b, 390—395 (1978); eingegangen am 8. April 1976 
  Published    1978 
  Keywords    Methane-Water Plasma, Aldehydes, Ketones, Alcohols, Acids 
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 Identifier    ZNB-1978-33b-0390 
 Volume    33 
94Author    Lothar KnollRequires cookie*
 Title    Reaktionen von Phosphoryliden mit Übergangsmetall-Verbindungen, V [1] 1-Diphenylphosphinyl-AlkyMentriphenylphosphoran-carbonyl-chrom- und -eisen-Komplexe Reactions of Phosphorus Ylides with Transition Metal Compounds, V [1] 1-Diphenylphosphinyl Alkylidenetriphenylphosphorane Carbonyl Chrom and Iron Complexes  
 Abstract    The synthesis of new ylide complexes is reported. They are synthesized by the reaction of (CO)5CrP(C6H5)2Cl and (CO)4FeP(C6H5)2Cl with phosphorus ylides (C6H5)3P = CHR (R = CH3, H) and characterized by their IR, NMR and 31 P NMR spectra. 
  Reference    Z. Naturforsch. 33b, 396—398 (1978); eingegangen am 23. Januar 1978 
  Published    1978 
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 Identifier    ZNB-1978-33b-0396 
 Volume    33 
95Author    N. Gottstein, H. J. KellerRequires cookie*
 Title    .3-Diondioxime und ihre Metall(II)-Komplexe mit den Ionen Nickel(II), Palladium(II) und Platin(II) 1,3-Dionedioximes and their Metal(II) Complexes with Ions Niekel(II), Palladium(II) and Platinum(II)  
 Abstract    Planar d 8 -Transition Metal Complexes Several alkyl and aryl substituted 1,3-dionedioximes, like acetylacetonedioxime, have been reacted with nickel(II), palladium(II) and platinum(II) in aqueous or alcoholic solution. Two kinds of complexes were obtained: (i) those with stoichiometry metal: ligand =1:1 and (ii) bis(l,3-dionedioximato)metal(II) complexes. None of the isolated solid compounds showed any sign of appreciable intermolecular metal metal interactions. An attempt to enhance intermolecular interaction by oxidizing the compounds with iodine lead to the destruction of all of the complexes. 
  Reference    Z. Naturforsch. 33b, 399—402 (1978); eingegangen am 13. Dezember 1977 
  Published    1978 
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 Identifier    ZNB-1978-33b-0399 
 Volume    33 
96Author    AhemdI. Khodair, A. A. Abdel-Wahab, A. M. El-KhawagaRequires cookie*
 Title    Synthesis of Sulphones from Sulphonyl Fluorides and Organometallic Compounds  
 Abstract    The reaction between sulphonyl fluorides and arylmagnesium bromides was investi-gated. The good yields of sulphones obtained demonstrates the potentialities of this reaction as a synthetic method for sulphones. Cadmium reagents were found to be unreactive toward the same sulphonyl fluorides. 
  Reference    Z. Naturforsch. 33b, 403—406 (1978); received January 19 1978 
  Published    1978 
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 Identifier    ZNB-1978-33b-0403 
 Volume    33 
97Author    Henri Brunner, Manfred Muschiol, Wilfried NowakRequires cookie*
 Title    Optisch aktive Übergangsmetall-Komplexe, LVII [1]  
 Abstract    (+)-und (—)-C5H5M(CO)(P02R*)X mit M = Fe, "Fe und X = 1, COCH3, CH3 Optically Active Transition Metal Complexes, LVII [1] (+)-and (—)-C5H5M(CO)(P02R*)X with M = Fe, "Fe, and X = I, COCH3, CH3 In the reaction of C5H5Fe(CO)2l and CsHsFefCO^CHa, respectively, with S-(+)-(C6H5)2PN(CH3)CH(CH3)(C6H5) (abbreviated P02R*) the complexes C5H5Fe(CO)(P02R*)I(l),C5H5Fe(CO)(P02R*)COCH3(2),andC5H5Fe(CO)(P02R !,t)CH3(3) are formed as pairs of diastereoisomers the components of which differ only in the configu-ration at the iron atom. CsH5Fe(CO)(P02R*)CH3 (3) can be obtained in higher yield by photochemical decarbonylation of C5H5Fe(CO)(P02R*)COCH3 (2). The (+)s85-and (—)365-diastereoisomers of each pair exhibit different chemical shifts in the X H NMR spectra. Diastereoisomer separation can be achieved by fractional crystallization. Starting with 57 Fe metal (—)365-C5H5 57 Fe(CO)(P02R*)I was prepared via 57 FeI2, 57 Fe(CO)4l2, C5H5 57 Fe(CO)2l, and C5H5 57 Fe(CO)(P02R*)I in order to demonstrate optical activity of a 57 Fe compound in the y region by Mössbauer polarimetry in later experiments to be reported elsewhere. 
  Reference    Z. Naturforsch. 33b, 407—411 (1978); eingegangen am 24. Januar 1978 
  Published    1978 
  Keywords    Diastereoisomer Separation, X H NMR, Optical Activity, Transition Metal Complexes 
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 TEI-XML for    default:Reihe_B/33/ZNB-1978-33b-0407.pdf 
 Identifier    ZNB-1978-33b-0407 
 Volume    33 
98Author    Reinhold Tacke, Roland NiednerRequires cookie*
 Title    Sila-Pharmaka, 9. Mitt. [1] Darstellung und Eigenschaften potentiell curarewirksamer Silicium-Verbindungen, I Preparation and Properties of Silicon Compounds with Potential Curare-Like Activity, I  
 Abstract    Organosilicon compounds 8, 9 and 10 with potential curare-like action and their precursors 5, 6 and 7 were synthesized for the first time. 5-10 were characterized by their physical and chemical properties, and their structures were confirmed by analyses, 1 H NMR and mass spectroscopy (only for 5-7). The pharmacological and toxicological data of 8, 9 and 10 are reported. 
  Reference    Z. Naturforsch. 33b, 412—416 (1978); eingegangen am 3. Februar 1978 
  Published    1978 
  Keywords    Silicon Compounds, Pharmacological Properties, Toxicological Properties, Curare-Like Activity 
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 TEI-XML for    default:Reihe_B/33/ZNB-1978-33b-0412.pdf 
 Identifier    ZNB-1978-33b-0412 
 Volume    33 
99Author    Klaus Beelitz, Gerhard Höhne, Klaus PraefckeRequires cookie*
 Title    Organische Schwefelverbindungen, XXIX [1] Thiocarbonyl-Derivate von 2-Thioxo-Malonsäureestern Organic Sulfur Compounds, XXIX [1] Thiocarbonyl Derivatives of 2-Thioxomalonic Acid Esters  
 Abstract    Dihydrothiopyrans, a-Oxo-methylene Bisxanthogenats The first derivatives of the hitherto unknown 2-thioxo malonic acid ester could be achieved. In dependence of conditions and presence of an enophile (3) substituted dihydro thiopyrans (5) as 4 + 2 addition products of hypothetic 2-thioxo malonic acid esters with 3 or a-oxo-methylene bisxanthates 7 resp. are formed in reactions of dibromo malonic acid esters 1 with potassium O-ethylxanthate (2). 
  Reference    Z. Naturforsch. 33b, 417—419 (1978); eingegangen am 18. Januar 1978 
  Published    1978 
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 TEI-XML for    default:Reihe_B/33/ZNB-1978-33b-0417.pdf 
 Identifier    ZNB-1978-33b-0417 
 Volume    33 
100Author    Claudia Bäk, Klaus PraefckeRequires cookie*
 Title    Aromatische Photosubstitutionsreaktionen halogenierter Benzoesäurebenzylester [1] Aromatic Photosubstitution Reactions of Halogenated Benzoic Acid Benzylesters [lj  
 Abstract    Aromatic Photosubstitutions A photorearrangement of the benzylester of benzoic acid in ethanol as discribed under formation of 2-benzyl-resp. 4-benzylbenzoic acid does not occur. In dependence of irradiation time and used UV lamp the only definate product found is benzoic acid in different yields (5-21%). On irradiation through Pyrex or Solidex filter glass the benzyl -ester does not react. Benzylesters of 2-halogenated resp. 2,4-or 2,6-dichlorated benzoic acids undergo a photosubstitution of halogens in 2-position against hydrogen or phenyl from the solvent ethanol or benzene resp. A photochemical cleavage of the C-Cl-bond in 4-position as well eis a substitution of halogens against benzyl under formation of 2-benzyl-or 4-benzyl-benzoic acids are not observed. But in some cases benzoic acid or benzylhalides are isolated. 
  Reference    Z. Naturforsch. 33b, 420—424 (1978); eingegangen am 30. Dezember 1977 
  Published    1978 
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 Identifier    ZNB-1978-33b-0420 
 Volume    33 
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