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1978 (361)
41Author    GerhardE. Herberich, Bernd HeßnerRequires cookie*
 Title    Über die Darstellung von 1.1.4.4-Tetramethyl-1.4-distanna- 2.5-cyclohexadien und dessen Bis(kupfer(I)-chlorid)-Komplex Synthesis of l,l,4,4-Tetramethyl-l,4-distanna-2,5-cyclohexadiene and its Bis(copper(I)chloride) Complex  
 Abstract    Hydrostannation, Distannacyclohexadiene, Copper(I) Chloride Complex Hydrostannation of dimethyldiethynylstannane with dimethylstannane leads to 1,1,4,4-tetramethyl-l,4-distanna-2,5-cyclohexadiene, a simple representative of the 1,4-distanna-2,5-cyclohexadiene ring system. With copper(I) chloride an unusually stable bis(copper(I) chloride) complex is obtained. Stannacarbocyclodiene des Typs X(CH=CH)2SnR-2 (mit z.B. X = CH2, C2H4, O-C6H4 und R = CH3, 
  Reference    Z. Naturforsch. 33b, 180—182 (1978); eingegangen am 2. November 1977 
  Published    1978 
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 TEI-XML for    default:Reihe_B/33/ZNB-1978-33b-0180.pdf 
 Identifier    ZNB-1978-33b-0180 
 Volume    33 
42Author    A. Kettrup, P. Ackermann, W. RiepeRequires cookie*
 Title    Massen-, NMR-und IR-spektroskopische Untersuchungen an Berylliumchelaten substituierter Acetoacetanilide Investigations of Beryllium Chelates with Substituted Acetoacetanilides by Mass. NMR and IR Spectroscopy  
 Abstract    Correlation of measurements by mass, NMR and IR spectrometry were carried out for the determination of the structure and stability of beryllium chelates of substituted aceto-acetanilides. The substituents at the phenyl ring of the amide group influence the position of the stretching vibrations of the beryllium-oxygen bonds, the chemical shift of the amide proton and also the abundance ratios of specific ions of fragments in the respective mass spectra. All these results are correlated and represent data for the stability of these metal chelates. 
  Reference    Z. Naturforsch. 33b, 183—189 (1978); eingegangen am 6. Oktober/2. Dezember 1977 
  Published    1978 
  Keywords    Berylliumchelates, Mass Spectra, Hammett a-Values 
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 TEI-XML for    default:Reihe_B/33/ZNB-1978-33b-0183.pdf 
 Identifier    ZNB-1978-33b-0183 
 Volume    33 
43Author    D. Seilmann, P. Kreutzer, E. UngerRequires cookie*
 Title    Über die Koordination von Kohlenmonoxid an Bis(dithiolato)-Eisen-Komplexen [1] On the Coordination of Carbon Monoxide on Bis(dithiolato)-Iron Complexes [1]  
 Abstract    Dithiolato Iron Carbonyl Complexes The reaction of CO with iron salts in the presence of benzene-dithiol depends on the oxidation state of iron, pH of the solution, temperature and CO pressure. In alkaline EtOH one obtains labile cis-[Fe(CO)2(C6H4S2)2] 2 ~" complexes, which cannot be isolated in the solid state. On acidifying, oxidizing with O2 or heating the solution, the CO ligands are split off; after reduction with NaBHi, CO can be co-ordinated again at pH > 7 under normal conditions. Reacting benzene-l-thiomethyl-2-thiol in alkaline medium with Fe 2+ and CO yields the isolable [cis-Fe(CO)2(CH3S-C6H4-S)2], which is characterized by elemental analyses, IR, X H NMR and mass spectra. It is a labile complex coordinating CO reversibly. 
  Reference    Z. Naturforsch. 33b, 190—196 (1978); eingegangen am 12. Dezember 1977 
  Published    1978 
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 TEI-XML for    default:Reihe_B/33/ZNB-1978-33b-0190.pdf 
 Identifier    ZNB-1978-33b-0190 
 Volume    33 
44Author    R.R M Brand, M. L. Hallenslebenf, H. K. Schenkel, E. D. SchmidRequires cookie*
 Title    Ramanintensitäten und Reaktivität von Phenylvinylethern und Phenylvinylsulfiden Raman Intensities and Reactivity of Phenyl Vinyl Ethers and Phenyl Vinyl Sulphides  
 Abstract    From a selection of alkyl substituted phenyl vinyl ethers and phenyl vinyl sulphides, respectively, the Raman intensities of the aromatic 8 a, b vibration and the C = C valence vibration were measured and compared to the reactivities in the cycloaddition reaction to tetracyanoethylene. 
  Reference    Z. Naturforsch. 33b, 197—199 (1978); eingegangen am 24. Oktober 1977 
  Published    1978 
  Keywords    Substituted Phenyl Vinyl Ethers, Cycloaddition, Tetracyanoethylene, Raman 
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 TEI-XML for    default:Reihe_B/33/ZNB-1978-33b-0197.pdf 
 Identifier    ZNB-1978-33b-0197 
 Volume    33 
45Author    ManfredL. Ziegler, K. Weidenhammer, K. Autenrieth, H. FriebolinRequires cookie*
 Title    Die Molekül-und Kristallstrukturen von Methyl(4-Br-phenyl)mino-chlorphenylboran, (BrC6H4) (CH3)NB(C1)(C6H5), und Methyl(2-methyl-4-Br-plienyl)amino-clilor(2-metliylphenyl)boran, (BrC7H6)(CH3)NB(Cl)(C7H7)  
 Abstract    The Crystal and Molecular Structures of Methyl(4-Br-phenyl)amino-chlorphenylborane, (BrC6H4)(CH3)NB(Cl)(C6H5) and Methyl(2-methyl-4-Br-phenyl)amino-chlor(2-methylphenyl)-borane, (BrC7H6)(CH3)NB(Cl)(C7H7) X-ray, Structure Determination, Amino Boranes The structures of the titles compounds have been determined by three-dimensional X-ray data. 
  Reference    Z. Naturforsch. 33b, 200—208 (1978); eingegangen am 19. 0ktober/30. November 1977 
  Published    1978 
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 TEI-XML for    default:Reihe_B/33/ZNB-1978-33b-0200.pdf 
 Identifier    ZNB-1978-33b-0200 
 Volume    33 
46Author    ZarifH. KhalilRequires cookie*
 Title    Synthesis of New Oxindolotrimethine Meroeyanine Dyes  
 Abstract    Meroeyanine Dyes, Synthesis New oxindolotrimethine meroeyanine dyes (3a-l) were prepared by the reaction of 2-methyl quaternary salts with 3-acylidene oxindole (2) in presence of a basic catalyst. The new compound were identified by IR and UY spectral determination. Bactericidal activity of selected quinoxindolotrimethine meroeyanine dyes (3e, g and 1) were tested against 11 pathogenic bacterial strains. 
  Reference    Z. Naturforsch. 33b, 209—211 (1978); received August 22/November 14 1977 
  Published    1978 
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 TEI-XML for    default:Reihe_B/33/ZNB-1978-33b-0209.pdf 
 Identifier    ZNB-1978-33b-0209 
 Volume    33 
47Author    NarendraS. SridharaRequires cookie*
 Title    Thermal Decomposition of P,P-diphenyl-N-benzyl-phosphinothioic Amide and P,P-diphenyl-N-methyl-phosphinothioic Amide  
  Reference    Z. Naturforsch. 33b, 212—213 (1978); received July 1 1977 
  Published    1978 
  Keywords    2, 2, 4, 4, 6, 6-Hexaphenylcyclophosphazatriene, Diphenylphosphinothioic Amide, 113355-Hexaphenyl-1 -methylaminotriphosphazene-5-sulphide, P, P-Diphenyl-N-dimethylphosphinothioic Amide 
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 TEI-XML for    default:Reihe_B/33/ZNB-1978-33b-0212.pdf 
 Identifier    ZNB-1978-33b-0212 
 Volume    33 
48Author    J. P. Tiwari, R. L. MitalRequires cookie*
 Title    Angular Heterocyclics: Studies in the Synthesis of Some Substituted 6-Anilino-5-alkoxy-12 H-benzo [a] phenothiazines 6-Anilino-5-methoxy-12H-benzo[a]phenothiazines, 6-Anilino-5-isopropoxy-12H-benzo[a]-phenothiazines  
  Reference    Z. Naturforsch. 33b, 214—215 (1978); received September 26 1977 
  Published    1978 
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 TEI-XML for    default:Reihe_B/33/ZNB-1978-33b-0214.pdf 
 Identifier    ZNB-1978-33b-0214 
 Volume    33 
49Author    Mohamed Hilmy Elnagdi, Mohamed Rifaat, Hamza Elmoghayar, ShereifMahmoud Fahmy, Mohamed Kamal, Ahmed Ibraheim, HikmatHussein AlnimaRequires cookie*
 Title    Reactions with Heterocyclic Diazonium Salts, II Synthesis of Some New Pyrazolo[l,5-c]-as-triazines and l,2,4-Triazolo[l,5-c] -as-triazines  
 Abstract    Heterocyclic Diazonium Salts, Pyrazolo[l,5-c]-as-triazines 3-Phenylpvrazole-5-diazonium chloride (2) couples with benzoylacetonitrile and with phenacylthiocyanate to yield the corresponding hydrazone derivatives 3 a, b. Whereas 3 a cyclised into the pyrazolo[l,5-c]-as-triazine derivative (4a) upon treatment with concen-trated sulphuric acid via elimination of water, treatment of 3 b with the same reagent under the same conditions has resulted in elimination of thiocyanic acid and the formation of the pyrazolo[l,5-c]-as-triazine derivative (4b). Treatment of 2 with aqueous sodium acetate has afforded the corresponding 3-phenyl-5-diazopyrazole (6). The latter reacted readily with dipolarophiles to yield pyrazolo-[l,5-c]-as-triazine derivatives. Pyrazolo[l,5-c]-as-triazines has also been formed upon treatment of 6 with active methylene compounds. The mechanism of reaction of 2 and 6 with active methylene compounds is discussed. Diazotization of 5-amino-3-ethyl-l,2,4-triazole nitrate (7) has afforded the correspond-ing diazonium derivative which coupled with benzoylacetonitrile and with acetoacet-anilide to yield the corresponding hydrazones 9 a, b. The latter could be cyclised into l,2,4-triazolo[l,5-c]-as-triazines by the action of concentrated sulphuric acid. 
  Reference    Z. Naturforsch. 33b, 216—219 (1978); received July 29/November 22 1977 
  Published    1978 
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 TEI-XML for    default:Reihe_B/33/ZNB-1978-33b-0216.pdf 
 Identifier    ZNB-1978-33b-0216 
 Volume    33 
50Author    C. E. May, K. Niedenzu, S. TrofimenkoRequires cookie*
 Title    Spectroscopic Studies on Pyrazaboles  
 Abstract    The mass spectra of several pyrazaboles of type 1 where R and'or R' = C2H5 have been studied. The loss of boron-bonded hydrocarbon moieties under electron impact is the predominant feature of all spectra. Some ultraviolet and nuclear magnetic resonance data on compounds of type 1 have been collected; bulky substituents were observed to lead to conformational isomers that can be detected by 13 C NMR spectroscopy. 
  Reference    Z. Naturforsch. 33b, 220—223 (1978); received October 11 1977 
  Published    1978 
  Keywords    Pyrazaboles, Dimeric Aminoboranes, Boron Compounds, Mass Spectra, NMR 
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 TEI-XML for    default:Reihe_B/33/ZNB-1978-33b-0220.pdf 
 Identifier    ZNB-1978-33b-0220 
 Volume    33 
51Author    Milan StrašákRequires cookie*
 Title    Substituent Effects in the Oxythallation of Alkenes  
 Abstract    The rate constants for oxythallation of alkenes have been correlated with their experi-mental and calculated ionization potentials respectively. A good correlation between the rate constants and the ionization potentials of alkenes was found. It was found that inductive effects were the most important in the oxythallation of RCH —CH2 and RiR2C = CH2 alkenes. From earlier studies [1, 2] it is obvious that the rate determining step of the oxidation of alkenes by thallic salts is the formation of the intermediate oxythallation adduct according to Eq (1): R2C=CR2 + T13+ + H20 -> [CR2(0H)CR2T1]2+ + H+ (1) 
  Reference    Z. Naturforsch. 33b, 224—227 (1978); received October 20 1977 
  Published    1978 
  Keywords    Alkenes, Oxythallation, Kinetics, Inductive Effect, Ionization Potentials 
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 TEI-XML for    default:Reihe_B/33/ZNB-1978-33b-0224.pdf 
 Identifier    ZNB-1978-33b-0224 
 Volume    33 
52Author    T. K. Raja, N. Soundararajan, V. Bakthavachalam, P. ShanmugamRequires cookie*
 Title    Selenium Heterocycles, III [1] Synthesis of Selenolo(2,3-b)quinolines  
 Abstract    2-Chloro-3-(l',2'-dibromoethyl)quinoline, Selenolo(2,3-b)quinoline, Selenium Heterocycles 
  Reference    Z. Naturforsch. 33b, 228—229 (1978); received October 17 1977 
  Published    1978 
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 TEI-XML for    default:Reihe_B/33/ZNB-1978-33b-0228.pdf 
 Identifier    ZNB-1978-33b-0228 
 Volume    33 
53Author    Edmund Kwiatkowski, Krystyna Kozubek, Zbigniew PepliǹskiRequires cookie*
 Title    Complexation of Tertiary Amides by Phenols in Carbon Tetrachloride Solutions  
 Abstract    Formation constants for 1 : 1 complexes of N,N-dialkylamides and N-acetylmorpholine with chloro-and nitrophenols have been determined spectrophotometrically in carbon tetrachloride solutions at 20 °C. Enthalpies of reaction for 14 systems have been obtained calorimetrically. Dipole moments of N,N-di(n-butyl)acetamide, N,N-di(isobutyl)acet-amide and N-acetylmorpholine have been determined. 
  Reference    Z. Naturforsch. 33b, 230—236 (1978); received November 15 1977 
  Published    1978 
  Keywords    Molecular Complexes, Tertiary Amides, Phenols 
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 TEI-XML for    default:Reihe_B/33/ZNB-1978-33b-0230.pdf 
 Identifier    ZNB-1978-33b-0230 
 Volume    33 
54Author    K. B. Ulmschneider, H. B. Stegmann, K. Scheffler, G. ViertelRequires cookie*
 Title    Ionenpaare von o-Semichinonen mit Diorganothallium(QI)-Kationen* Ion Pairs of Semiquinones with Diorgano Thallium (III) Cations  
 Abstract    Diorgano thallium hydroxide reacts very smoothly in organic solvents with catechols to stable paramagnetic ion pairs. This reaction has been investigated with two semiquinone anions and 13 different diorgano thallium cations. The data obtained indicate a strong dependence of the thallium coupling constant on the nature of the metal substituents. The effects observed are discussed in terms of electronic and steric interactions. All ion pairs indicate remarkable temperature dependence of the thallium splitting and the g-factor. These results are compared with the results obtained in alkali metal ion pairs using a model described in the literature. Einführung 
  Reference    Z. Naturforsch. 33b, 237—240 (1978); eingegangen am 4. November 1977 
  Published    1978 
  Keywords    Ion Pairs, ESR, Radicals, Thallium Organic Compounds 
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 TEI-XML for    default:Reihe_B/33/ZNB-1978-33b-0237.pdf 
 Identifier    ZNB-1978-33b-0237 
 Volume    33 
55Author    Egbert Gehle, Horst SabrowskyRequires cookie*
 Title    First Alkali Metal Thallium(I) Sulfides  
 Abstract    Alkali Metal Thallium(I) Sulfides The new hexagonal red compounds K4TI2S3 (o = 1060, c = 711.0 pm), Rb4Tl2S3 (a = 1074, c = 767.4 pm) and the monoclinic red K7TIS4 (a = 1225, b = 1646, c = 1408 pm, ß = 103.2°) were characterized by DTA and X-ray in-vestigations. 
  Reference    Z. Naturforsch. 33b, 241 (1978); eingegangen am 29. August 1977 
  Published    1978 
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 TEI-XML for    default:Reihe_B/33/ZNB-1978-33b-0241_n.pdf 
 Identifier    ZNB-1978-33b-0241_n 
 Volume    33 
56Author    HansJoachim BreunigRequires cookie*
 Title    Synthese von Tri-fert-butylstibin und Tetra-fert-butylcyclotetrastiban durch Reaktion von Di-tert-butylantimonchlorid mit Magnesium Synthesis of Tri-£er£-butylstibine and Tetra-ferf-butylcyclotetrastibane by Reaction of Di-terf-butylantimonychloride with Magnesium  
 Abstract    Tri-£er£-butylstibine, Tetra-Jert-butylcyclotetrastibane Di-terJ-butylantimonychloride reacts with magnesium to tri-teri-butylstibine and tetra-£er£-butylcyclotetrastibane. 
  Reference    Z. Naturforsch. 33b, 242—243 (1978); eingegangen am 27. Mai 1977 
  Published    1978 
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 TEI-XML for    default:Reihe_B/33/ZNB-1978-33b-0242_n.pdf 
 Identifier    ZNB-1978-33b-0242_n 
 Volume    33 
57Author    HansJoachim BreunigRequires cookie*
 Title    Synthese von Tetrakis(trimethylgermyl)- distiban Synthesis of Tetrakis (trimethylgermyl)- distibane  
 Abstract    Tetrakis (trimethylgermyl)distibane Tris(trimethylgermyl)stibine reacts with al-kylhalides with formation of tetrakis (trimethyl -germyl)distibane. 
  Reference    Z. Naturforsch. 33b, 244—245 (1978); eingegangen am 18. Nov./12. Dez. 1977 
  Published    1978 
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 TEI-XML for    default:Reihe_B/33/ZNB-1978-33b-0244_n.pdf 
 Identifier    ZNB-1978-33b-0244_n 
 Volume    33 
58Author    Axel Blecher, Bernd MathiaschRequires cookie*
 Title    Zinn-Chalkogenheterocyclen, Mil [1] Dimethylzinntellurid, ein Sechsring Tin-Chalcogen Heterocycles, VIII [1] Dimethyltin Telluride, a Six-membered Ring  
 Abstract    The first tin-tellurium six-membered ring, tris(dimethvltin telluride) is obtained by the reaction of dimethylstannane with tellurium. The trimeric character of this compound is proved by molecular weight determination and mass spectral data. Additional vibrational data are given. 
  Reference    Z. Naturforsch. 33b, 246 (1978); eingegangen am 11. November/8.Dezember 1977 
  Published    1978 
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 TEI-XML for    default:Reihe_B/33/ZNB-1978-33b-0246_n.pdf 
 Identifier    ZNB-1978-33b-0246_n 
 Volume    33 
59Author    Henri Brunner, Manfred MuschiolRequires cookie*
 Title    Optisch aktive Übergangsmetall-Komplexe  
 Abstract    , LV [1]. Darstellung und Stereochemie von [C5H5Mo(CO)2 NN'jPFe mit NTS'=Ethylen-diamin und Propylendiamin Optically Active Transition Metal Complexes, LV [1] Preparation und Stereochemistry of [C5H5Mo(CO)2NN']PF6 with NN'=Ethylenediamine and Propylene -diamine In the reaction of CsHsMotCO^Cl with ethylenediamine and propylenediamine, ab-breviated with NN', the square pyramidal cations [C5H5Mo(C0)2NN'] + are formed. The diastereoisomeric pairs of enantiomers of the propylenediamine derivative are separated by fractional crystallization. The epimerization at the asymmetric Mo atom (n,2 = 30 min, 75 °C, CD3OD solution) can be followed by NMR spectroscopy. 
  Reference    Z. Naturforsch. 33b, 247—248 (1978); eingegangen am 12. Oktober 1977 
  Published    1978 
  Keywords    Diastereoisomeric Pairs of Enantiomers, Separation, Epimerization 
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 TEI-XML for    default:Reihe_B/33/ZNB-1978-33b-0247_n.pdf 
 Identifier    ZNB-1978-33b-0247_n 
 Volume    33 
60Author    N.P S Bisht, Ranbir Singh, R. K. Bansal, Pahup SinghRequires cookie*
 Title    Isolation of n-Triacontane, Aliphatic Alcohols and Sitosterols from Convolvulus Microphyllus Sieb  
 Abstract    n-Triacontane, n-Hexacosanol, n-Octacosanol, /^-Sitosterol, Convolvulus microphyllus Sieb From the petroleum ether extract of Convol-vulus microphyllus n-triacontane, a mixture of higher aliphatic primary alcohols -w-hexa-cosanol, n-octacosanol, n-triacontanol and n-dotriacontanol, ß-and e-sitosterols were obtained and characterised by IR, NMR and mass spectral studies and normal methods. Convolvulus microphyllus 
  Reference    Z. Naturforsch. 33b, 249 (1978); received September 26 1977 
  Published    1978 
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 TEI-XML for    default:Reihe_B/33/ZNB-1978-33b-0249_n.pdf 
 Identifier    ZNB-1978-33b-0249_n 
 Volume    33 
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