Go toArchive
Browse byFacets
Bookbag ( 0 )
Facet   section ZfN Section B:Volume 034  [X]
Results  382 Items
Sorted by   
Publication Year
1979 (382)
101Author    J. M. Tsangaris, S. Perlepes, A. G. GalinosRequires cookie*
 Title      
 Abstract    N,N'-(Dipicolyl) 1,8-naphthylenediamine, [N,N'-(Dipicolyl)l,8-naphthylenediamidato]copper(II), [N, N' -(Dipicoly 1) 1,8 -naphthylenediamidato] nickel(II) 
  Reference    Z. Naturforsch. 34b, 456—458 (1979); received October 30 1978 
  Published    1979 
  Similar Items    Find
 DEBUG INFO      
 TEI-XML for    default:Reihe_B/34/ZNB-1979-34b-0456.pdf 
 Identifier    ZNB-1979-34b-0456 
 Volume    34 
102Author    B. P. Baranwal, G. K. Parashar, R. C. MehrotraRequires cookie*
 Title    Chemistry of Alkoxo Complexes, Part III * Synthesis and Characterization of Some Mono(carboxylato)mono (alkoxo)nickel(II) Complexes  
 Abstract    A number of mono(carboxylato)mono(alkoxo)nickel(II) complexes of the general for-mula, Ni(OR)(OOCR'), (with R' = C13H07, C15H31 and C17H35) have been synthesized (where R = Me and Pr») by the reactions of nickel methoxide and isopropoxide with the respective carboxylic acids in equimolar ratio and (where R = Et and Bu<) by alcohol interchange reactions. A study of the molecular weight, infra-red and electronic reflect-ance spectra and magnetic susceptibility in addition to elemental analyses has been carried out to throw some light on the probable structure of these derivatives. Extensive studies have been carried out on metal carboxylates and several reviews [1-4] have been published during the last two decades. Following the first successful synthesis of aluminium tri-carboxylates from aluminium isopropoxide [5], the mixed alkoxy carboxylates of a number of metals [6] have also been studied from synthetic as well as structural points of view. A perusal of the literature revealed that while a considerable amount of work has been carried out on the interesting alkoxy carboxylates of earlier transition elements [viz. Ti, Zr and V) [7-9], almost no work has been done on similar derivatives of the latter ones. In view of the above, it was considered of interest to investigate the reactions of nickel (a typical latter transition element) alkoxides with carboxylic acids. It has been found that these reactions are quite facile and yield mixed alkoxy carboxylates of the general formula, Ni(OR)(OOCR') and the anhydrous dicarboxylates, Ni(OOCR')2 according to the molar ratio of the reactants taken. All these compounds have been characterized by elemental analyses, infrared, electronic reflectance spectra, magnetic susceptibility and molecular weight determinations. Experimental 
  Reference    Z. Naturforsch. 34b, 459—473 (1979); received November 29 1978 
  Published    1979 
  Keywords    Nickel Alkoxides, Carboxylic Acids, Nickel Alkoxo Carboxylates, Molecular Weights, IR 
  Similar Items    Find
 DEBUG INFO      
 TEI-XML for    default:Reihe_B/34/ZNB-1979-34b-0459.pdf 
 Identifier    ZNB-1979-34b-0459 
 Volume    34 
103Author    Reiner Luckenbach, Nikolaus MüllerRequires cookie*
 Title    Zur elektrocyclischen Ringöffnung von Cyclopropylhalogeniden bei der Reaktion mit Natriumiodid in Aceton Electrocyclic Ring Opening of Cyclopropyl Halides in the Course of their Reaction with Sodium Iodide in Acetone  
 Abstract    Reaction of cyclopropyl halides with sodium iodide in acetone [i.e. under typical Sis-2-conditions), proceeds via ring opening to allylic systems finally yielding 1,5-hexadienes upon dimerisation; ring-retained products were not detected. Application of the Wood-ward-Hoffmann rules lends strong support to a cationic synchronous mechanism. This is also confirmed by kinetic measurements proving this reaction to be first order over all. The kinetic data are shown to fit the Hammett equation using cr-values for cyclopropyl bromides and o + -values for geminal cyclopropyl dichlorides, respectively. The validity of the Woodward-Hoffmann-De Puyrule (according to which in synchronous reactions leaving groups situated endo are strongly favored over those situated exo) is tested in corresponding experiments involving condensed ring systems. I. Zum Problem der nukleophilen Substitution an Cyclopropylsystemen In der vorliegenden Arbeit werden die Reaktionen von 2-phenylsubstituierten Cyclopropylhalogeniden unter typischen SN2-Bedingungen (Umsetzung mit Natriumiodid in Aceton) untersucht. Zunächst 
  Reference    Z. Naturforsch. 34b, 464—480 (1979); eingegangen am 10. August/19. Dezember 1978 
  Published    1979 
  Keywords    Ring Opening, Woodward-Hoffmann Rules, Allylic Cations, Dimerisation, 1, 5-Hexadienes 
  Similar Items    Find
 DEBUG INFO      
 TEI-XML for    default:Reihe_B/34/ZNB-1979-34b-0464.pdf 
 Identifier    ZNB-1979-34b-0464 
 Volume    34 
104Author    RadhakrishnanRequires cookie*
 Title      
  Reference    Z. Naturforsch. 34b, 481—487 (1979); received August 15 1978 
  Published    1979 
  Keywords    Solvolysis, Methylnorbornyl Systems, Norbornan-3, 6-dione, 2-exo-Methylnorbornan-6-one 
  Similar Items    Find
 DEBUG INFO      
 TEI-XML for    default:Reihe_B/34/ZNB-1979-34b-0481.pdf 
 Identifier    ZNB-1979-34b-0481 
 Volume    34 
105Author    Karsten Levsen, RichardD. Bowen, DudleyH. WilliamsRequires cookie*
 Title      
 Abstract    The non-decomposing molecular ions of methyl cyclopropanecarboxylate (14) are found to rearrange to ionised methyl but-3-enoate (15). For ions with sufficient internal energy to decompose, this isomerization is in competition with -OCH3 loss, via direct cleavage of the ester group. Collisional activation spectroscopy may be used to distinguish between the C3HsCO + ions formed by "OCH3 loss from the molecular ions of 14, 15 and other isomeric precursors. Four distinct C3HsCO+ species (18-21) can be identified in this way; these C3H5CO+ ions may themselves decompose, via CO elimination. Consideration of the metastable peak shape for CO loss, in conjunction with collisional activation spectroscopy on the resulting C3H5 4 -ions, leads to two main conclusions, (i) Two C3H5+ ions (22 and 27) exist in potential energy wells. The very narrow metastable peaks for CO loss from 19 and 21 (leading to 22 and 27, respectively) show that these processes are continuously endo-thermic. In contrast, CO loss from either 18 or 20 gives rise to much broader metastable peaks. This suggests that rate-determining rearrangement of the incipient C3Hs+ cations, to a more stable isomer, occurs prior to decomposition, (ii) Elimination of CO from the [M--OCH3]+ fragment of 14 gives rise to a composite metastable peak, thus indicating the occurrence of two competing channels for dissociation. These channels are assigned to CO loss from 18 (larger kinetic energy release) and CO loss from 19 (smaller kinetic energy release). Die interessanten chemischen Eigenschaften klei-ner Ringe werden seit vielen Jahren intensiv stu-diert [1]. Besondere Beachtung haben substituierte Cyclopropane (1 und 3) gefunden, für die Hoffmann [2] aufgrund von Molekülorbitalrechnungen das folgende Reaktivitätsmuster vorhergesagt hat: Elektronenliefernde Substituenten B schwächen die C(2)-C<3)-Bindung und sollten bei einer chemischen Reaktion (wie z.B. Hydrogenolj'se) zu C-verzweigten Produkten der allgemeinen Konstitution 2 führen. Für elektronenziehende Substituenten A gilt das Umgekehrte: Sie verstärken die C(2)-C(3>-und labili-sieren die C(i)-C(2)-Bindung mit dem Resultat, daß Produkte mit einer unverzweigten C3-Einheit ent-stehen. Tatsächlich konnte Musso [3] beweisen, daß 
  Reference    Z. Naturforsch. 34b, 488—494 (1979); eingegangen am 27. November 1978 
  Published    1979 
  Keywords    Unimolecular Isomerization, Ion Lifetime, Ion Structure, Collisional Activation, Kinetic Energy Release 
  Similar Items    Find
 DEBUG INFO      
 TEI-XML for    default:Reihe_B/34/ZNB-1979-34b-0488.pdf 
 Identifier    ZNB-1979-34b-0488 
 Volume    34 
106Author    C. Wesdemiotis, H. Schwarz, C. C. Van De Sande, F. Van GaeverRequires cookie*
 Title    Transalkylierung und protonenkatalysierte C-C-Spaltung bei n-Butyl-und irc-Pentylbenzol in der Gasphase Transalkylation and Proton Catalyzed C-C-Cleavage of Gaseous n-Butyl and w-Pentyl Benzenes  
 Abstract    The investigation of several 13 carbon and deuterium labelled n-butyl and n-pentyl benzenes demonstrate that chemical ionization (reagent gas: methane) induces specific carbon-carbon bond cleavages of the alkyl group. The extent of competing reaction channels as for instance direct alkene elimination versus dealkylation/reprotonation is analyzed. Partial hydrogen exchange processes between reagent ions and substrate molecules are restricted to the phenyl ring. Intramolecular exchange reactions between the side chain and the aromatic ring which are typical for the open shell molecular ions of alkyl benzenes are not observed for analogous closed shell cations. Die von Munson und Field [1] in die Massen-spektrometrie eingeführte Methode der Chemischen Ionisation (CI) hat sich nach einer längeren Induk-tionsperiode innerhalb weniger Jahre als ein wir-kungsvolles Instrument bei der Lösung vielfältigster Problemstellungen in der Chemie erwiesen [2]. Bei diesem Verfahren werden durch Elektronenstoß-ionisation (EI) aus einem gegebenen Reaktandgas diverse Ionen erzeugt, die dann ihrerseits mit Sub-stratmolekülen M z.B. im Sinne von Säure/Base-Reaktionen reagieren. Verwendet man beispiels-weise Methan als Reaktandgas, so liegen als reaktive Species hauptsächlich [CHs] + , [C2Hö] + und [C3H5] + vor; diese ionisieren die Substratmoleküle M in schnellen Ion/Molekülreaktionen [3], wobei u.a. Ionen vom Typ [MX]+ entstehen (X = H, C2H5, C3H5). Die reaktiven Eigenschaften solcher "closed 
  Reference    Z. Naturforsch. 34b, 495—501 (1979); eingegangen am 8. Dezember 1978 
  Published    1979 
  Keywords    Chemical Ionization, Carbocations, Hydrocarbons 
  Similar Items    Find
 DEBUG INFO      
 TEI-XML for    default:Reihe_B/34/ZNB-1979-34b-0495.pdf 
 Identifier    ZNB-1979-34b-0495 
 Volume    34 
107Author    El-Sayed Afsah, AbdelKader Fathy, Hassan Amer, EtmanRequires cookie*
 Title    Synthesis of 2-Cinnamoyl-l,3-indandione Derivatives and their Reactions with Hydrazine, Hydroxylamine Hydrochloride, Thiourea, Secondary Amines and Diethyl Oxalate  
 Abstract    2-Cinnamoyl-1,3-indandione Derivatives A series of 2-cinnamoyl-l,3-indandiones (2a-e) were obtained by condensing 1 with aldehydes. Treatment of 2 a with hydrazine or hydroxylamine hydrochloride gave 2-(5-phenyl-2-pyrazolinyl or -isoxazolinyl)-1,3-indandione (3 and 5) respectively, and when treated with thiourea gave 2-(6-phenyl-2-thioxo-4-pyrimidinyl)-l,3-indandione (6). The formation of 2-(/3-piperidino-, -morpholino-and -arylmercaptohydrocinnamoyl)-1,3-indandiones (7a-b and 8a-b) from 2 a was investigated. Compound 7 b when treated with hydrazine gave 9. The 2-(a,/?-dimorpholinohydrocinnamoyl) derivative (11) was obtained by the action of morpholine on the dibromo derivative (10). The Michael condensation of 2 a with ethyl acetoacetate or acetyl acetone was investigated. Treatment of 1 with benzaldehyde in (3:1) molar ratio gave 14, which reacted with diethyl oxalate to give 15. Cyclization of 15 with polyphosphoric acid lead to the formation of 16. In view of the reported biological activity of 2-aryl-l,3-indandione derivatives in treatment of thrombosis [1-3], as antiinflammatory agents [4], and miticides [5]. 2-Cinnamoyl-l,3-indandiones [6] (2) represent an adaptable starting material for the 
  Reference    Z. Naturforsch. 34b, 502—506 (1979); received October 25 1978 
  Published    1979 
  Similar Items    Find
 DEBUG INFO      
 TEI-XML for    default:Reihe_B/34/ZNB-1979-34b-0502.pdf 
 Identifier    ZNB-1979-34b-0502 
 Volume    34 
108Author    NazmiA. Kassab, Sanaa0. Abd, Allah, SaidA. ElbahaiiRequires cookie*
 Title    Arylhydrazonothiazolidinones: Ring Cleavage and Alkylation of the 5-Arylhydrazono Derivatives of Rhodanine and Isorhodanine  
 Abstract    The 5-arylhydrazono derivatives of rhodanine and isorhodanine were subjected to the action of hydrazine hydrate to afford the arylhydrazonomercaptomethyl-triazolinones (3) and -triazolinthiones (3) respectively. Treatment of 1 with benzylamine afforded thioxalic acid dibenzylamide (5). On the other hand treatment of 2 with the same reagent afforded the corresponding benzylimino derivatives (6). Alkylation of 1 and 2 with ethyl bromoacetate and chloroacetamide yielded the corresponding S-alkyl derivatives (7) and (8), respectively. The behaviour of the thiazolidinone ring system toward a variety of nucleophilic reagents has been extensively described in the literature [1-6]; reports on the behaviour of the 5-arylhydrazono derivatives of the thiazolidinone ring system remain relatively few. In continuation to our interest in the chemistry of heterocyclic imines [7-9], it was thought worth-while to extend our study to the 5-arylhydrazono derivatives of rhodanine [10-12] and isorhodanine [13] to compare the effect of the presence of the arylhydrazono group on the behaviour of the thia-zolidinone ring. The 5-arylhydrazono derivatives of rhodanine (la-d) and isorhodanine (2a-d) were subjected to the action of hydrazine hydrate at room tempera-ture, whereby an exothermic reaction took place, to ¥ Ar-N-N=C—C=0 I I S NH V la-d 4 Ar-N-N = C—C—N-H i Ii I SH N N-H V 3a-d A H Ar-N-N=C—C=S 2a-d S NH V Ar-N-N=C—C—N-H i SH 4a-d N N-H Y 0 1, 2, 3 and 4 Ar a: C6H5 b: C6H4CH3-O c: C6H4CH3-J9 D: C6H4C1 -p 
  Reference    Z. Naturforsch. 34b, 507—510 (1979); received September 28 1978 
  Published    1979 
  Keywords    Arylhydrazonorhodanines, Arylhydrazonoisorhodanines, Ring Cleavage, Triazolinones, Alkylation 
  Similar Items    Find
 DEBUG INFO      
 TEI-XML for    default:Reihe_B/34/ZNB-1979-34b-0507.pdf 
 Identifier    ZNB-1979-34b-0507 
 Volume    34 
109Author    George Sosnovsky, JamesA. KroghRequires cookie*
 Title    in the Conversion of Aldoximes to Nitriles  
 Abstract    The comparative usefulness of six sulfur, sulfenyl, selenenyl, and seleninyl chlorides towards aldoximes in the presence of a base were examined under similar reaction condi-tions. The reactions of aromatic aldoximes with either sulfur dichloride (1), sulfur mono-chloride (2), or trichloromethane sulfenyl chloride (3) in either ether or chloroform at 23-35 °C after one hour resulted in 60-84% yields of nitriles. Under the same conditions, the reactions of aliphatic aldoximes with either 1, 2, or 3 gave mixtures of products, while at —40 to —30 °C, 15-22% yields of aliphatic nitriles were obtained. The reactions of aliphatic and aromatic oximes with either benzenesulfenyl chloride (4), benzene-selenenyl chloride (5), or benzeneseleninyl chloride (6) produced after fifteen minutes to three hours the corresponding nitriles in 71-96% yields at 23-35 °C. In recent years a variety of reagents liave been considered for the transformation of aldoximes to nitriles [1], Due to deficiencies in some respects, such as, low yields, expensive or not readily available reagents, harsh reaction conditions, or, perhaps, most importantly, a lack of generality for both aliphatic and aromatic aldoximes, the search for mild, generally applicable methods continues. Recently, we reported [1-3] two such methods, using selenium dioxide in chloroform [1], and phosphorus imidazolides [2-3]. In connection with this work we have also investigated the scope and limitations of a number of readily accessible sulfur and selenium chlorides in the conversion of aldoximes to nitriles. In the literature one finds only a few reports on the use of chlorinated sulfur compounds in the transformation of aldoximes to nitriles. Thus, thionyl chloride was used successfully in only one case to produce 3-cyanoindole from the correspond-ing aldoxime [4]. The reactions of arylsulfonyl chlorides with substituted aromatic aldoximes resulted in mixtures of nitriles and isonitriles [5]. The reaction of para-chlorophenyl chlorothiofor-mate [6] gave high yields of aromatic nitriles. Chlorosulfonium salts [7], andphenylchlorosulfite [8] appear to be generally applicable, but are not readily available. 
  Reference    Z. Naturforsch. 34b, 511—515 (1979); received November 28 1978 
  Published    1979 
  Keywords    Sulfur Chlorides and Disulfides, Conversion of Aldehydes to Nitriles, Selenium Chlorides and Diselenides, Nitriles, Aldoximes 
  Similar Items    Find
 DEBUG INFO      
 TEI-XML for    default:Reihe_B/34/ZNB-1979-34b-0511.pdf 
 Identifier    ZNB-1979-34b-0511 
 Volume    34 
110Author    I. Mester, D. Bergenthal, Zs Rózsa, J. ReischRequires cookie*
 Title    3 C-NMR-Spektren einiger Acridon-Derivate [1] 13 C NMR Spectra of Some Acridone Derivatives [1]  
 Abstract    The 13 C NMR spectra of acridone derivatives 3-5, 8-12, melicopicine (14), melicopidine (15) and melicopine (16) are presented. The substituent parameters for OH and OCH3 groups in acridone derivatives have also been given. Hydroxylierte und alkoxylierte Acridone (9.10-Dihydroacridin-9-one) finden sich sowohl unter den Rutaceen-Alkaloiden [2] als auch unter den tieri-schen Stoffwechselprodukten einiger Arzneistoffe [3, 4]. Darüber hinaus mehren sich die Hinweise auf ihre Bedeutung als Grundstrukturen biologisch akti-ver Substanzen wie Phytonzide und Arzneistoffe [4, 5], In diesen Zusammenhängen hat die Analytik der Acridone in den letzten Jahren eine intensive Bearbeitung erfahren [6,7]; allein über die 13 C-NMR-Spektroskopie, die erst jüngst Gegenstand von 
  Reference    Z. Naturforsch. 34b, 516—519 (1979); eingegangen am 16. November 1978 
  Published    1979 
  Keywords    Hydroxyacridones, Methoxyacridones, 13 C NMR, Hydroxy Substituent Parameters, Methoxy Substituent Parameters 
  Similar Items    Find
 DEBUG INFO      
 TEI-XML for    default:Reihe_B/34/ZNB-1979-34b-0516.pdf 
 Identifier    ZNB-1979-34b-0516 
 Volume    34 
111Author    Ekkehard Lindner, Sigurd Hoehne, Kurt-Wolfram RodatzRequires cookie*
 Title    The Behaviour of Mono and Diorganyl- phosphane Sulphides towards Metal Carbonyl Systems, XXI [1]  
 Abstract    Preparation and Properties of Di[//-{(di-carbonyl-h 5 -cyelopentadienylmanganese)-climethylphosphine}thio]-bis(tetra-carbonylrhenium), (OC)4Re[h5-C5H5Mn(CO)2P(CH3)2S]2Re(CO)4 Rhenium Sulphur Heterocycle, IR. NMR (OC)4Re[h5-C5H5Mn(CO)2P(CH3)2S]2Re(CO)4 (1) containing a four-membered heterocycle with rhenium sulphur bonds is obtained from Na[h5-C5H5Mn(CO)2P(CH3)2S] and ClRe(CO)5 in THF at 60 °C. The *H, sip NMR and IR spectra are discussed. On the basis of x-ray pre-cession photographs both h 5 -C5H5Mn(CO)2P(CH3)2 groups in 1 are in an anti position. 
  Reference    Z. Naturforsch. 34b, 520—521 (1979); eingegangen am 28. November 1978 
  Published    1979 
  Similar Items    Find
 DEBUG INFO      
 TEI-XML for    default:Reihe_B/34/ZNB-1979-34b-0520_n.pdf 
 Identifier    ZNB-1979-34b-0520_n 
 Volume    34 
112Author    Natriumperchlorats Nac104, HansJoachim Berthold, BrigitteGabriele Kruska, Rudolf WartchowRequires cookie*
 Title    der orientierungsfehlgeordneten kubischen Hochtemperaturphase des The Crystal Structure of the Orientationally Disordered, Cubic High-temperature Phase of Sodium Perchlorate NaC104  
 Abstract    The crystal structure of the orientationally disordered, cubic high-temperature phase of NaC104 has been investigated using single crystal X-ray diffraction data. Space group Fm3m-Oj>, Z = 4, sodium and chlorine as in NaCl, oxygen in position 96 j (occupation factor 1/6). 
  Reference    Z. Naturforsch. 34b, 522—523 (1979); eingegangen am 22. Dezember 1978 
  Published    1979 
  Keywords    Sodium Perchlorate, Crystal Structure, Orientationally Disordered High-temperature Phase 
  Similar Items    Find
 DEBUG INFO      
 TEI-XML for    default:Reihe_B/34/ZNB-1979-34b-0522_n.pdf 
 Identifier    ZNB-1979-34b-0522_n 
 Volume    34 
113Author    Jürgen Evers, Gilbert Oehlinger, Armin WeissRequires cookie*
 Title    Kristallstruktur von SrGe2 bei hohen Drücken Crystal Structure of SrGea at High Pressures  
 Abstract    After a high pressure -high temperature treatment of orthorhombic SrGe2 (BaSi2 type of structure) a trigonal polymorph (EuGe2 type of structure) is obtained: space group P3ml; a — 410.4 pm, c — 516.5 pm; Z — 1; zee = 0.406. 
  Reference    Z. Naturforsch. 34b, 524 (1979); eingegangen am 7. Dezember 1978 
  Published    1979 
  Similar Items    Find
 DEBUG INFO      
 TEI-XML for    default:Reihe_B/34/ZNB-1979-34b-0524_n.pdf 
 Identifier    ZNB-1979-34b-0524_n 
 Volume    34 
114Author    K. Hustert, J. Schmitzer, H. Parlar, F. KörteRequires cookie*
 Title    Zur Synthese von 2.5-und 2.6-verbrückten Tetrahydromethanoindanen Synthesis of 2,5-and 2,6-Crosslinked Tetrahydromethanoindanes  
 Abstract    A direct synthetic method for some 2,5-and 2.6-crosslinked chlorinated tetrahydromethano-indanes, which are the most important conver-sion products of cyclodiene insecticides under abiotic conditions, is described. The structures of the resulting compounds are confirmed with the aid of MS and m NMR. 
  Reference    Z. Naturforsch. 34b, 525—527 (1979); eingegangen am 7. Dezember i978 
  Published    1979 
  Keywords    Cyclodien Insecticides, UV Photolysis, Cross-linked Chlorinated Tetrahydromethanoindanes 
  Similar Items    Find
 DEBUG INFO      
 TEI-XML for    default:Reihe_B/34/ZNB-1979-34b-0525_n.pdf 
 Identifier    ZNB-1979-34b-0525_n 
 Volume    34 
115Author    AdamantaneRafet Aydin, Harald GüntherRequires cookie*
 Title    3 C, ^-Spin-Spin Kopplungskonstanten, Teil IV Adamantan 13 C,*H Spin-Spin Coupling Constants, Part IV  
 Abstract    One-bond, geminal, and vicinal 13 C, 1 H cou-pling constants have been determined for ada-mantane using a-and /S-[D]adamantane and the relation »JpC^H) = 6,5144 "J(13 C, 2 H) for the conversion of the measured "J(13 C, 2 H) values. It is shown that the magnitude of 3 Jtrans is strongly influenced by the substitution pattern. Relative H,D isotope effects for 13 C chemical shifts are given. 
  Reference    Z. Naturforsch. 34b, 528—529 (1979); eingegangen am 11. Dezember 1978 
  Published    1979 
  Similar Items    Find
 DEBUG INFO      
 TEI-XML for    default:Reihe_B/34/ZNB-1979-34b-0528_n.pdf 
 Identifier    ZNB-1979-34b-0528_n 
 Volume    34 
116Author    R. Hargreaves, Andl Mcdougall, Rabari, -MerRequires cookie*
 Title     
 Abstract    -captodihydrocarvone (True Carbone Hydrosul-phide) and (lS,4S,5S)-4,7,7-Trimethyl-6-thia-l,5-bicyclo-[3,2,l]-octan-3-one. 
  Reference    Z. Naturforsch. 34b, 530 (1979) 
  Published    1979 
  Similar Items    Find
 DEBUG INFO      
 TEI-XML for    default:Reihe_B/34/ZNB-1979-34b-0530_e.pdf 
 Identifier    ZNB-1979-34b-0530_e 
 Volume    34 
117Author    Joachim MüllerRequires cookie*
 Title    5 N—NMR-Spektroskopische Untersuchung von Dimethylaluminiumazid, Dimethylgalliumazid und Dimethylarsenazid 15 N NMR Spectra of the Azides of Dimethylaluminium, Dimethylgallium, and Dimethylarsenic  
  Reference    Z. Naturforsch. 34b, 531—535 (1979); eingegangen am 15. November/28. Dezember 1978 
  Published    1979 
  Keywords    Azides, 15 N NMR, Vibrational Spectra 
  Similar Items    Find
 DEBUG INFO      
 TEI-XML for    default:Reihe_B/34/ZNB-1979-34b-0531.pdf 
 Identifier    ZNB-1979-34b-0531 
 Volume    34 
118Author    Z. NaturforschRequires cookie*
 Title      
 Abstract    Trimethyltin Azide, Trimethyltin Azide-Hydroxide Adduct, 13 C NMR, 15 N NMR, Vibrational Spectra (CH3)3SnN3 (1) and (CH3)3SnN3 • (CH3)3SnOH (2) were characterized by physical and spectroscopic properties. In solution the azido groups show a temperature dependent site exchange. Im Rahmen der spektroskopischen Untersuchun-gen 15 N-markierter Azide [1-3] war auch Trimethyl-zinnazid von Interesse. Das 14 N-NMR-Spektrum [4], das nur bei Zimmertemperatur aufgenommen wer-den konnte, täuschte ionisches Me3Sn+N3~ vor; dies steht im Gegensatz zu den übrigen physikalischen Eigenschaften. Die Messung der Temperaturabhän-gigkeit des 15 N-NMR-Spektrums sollte diese Frage entscheiden können. Mit Hilfe der 15 N-Markierung wird zudem die Quadrupol-Linienverbreiterung durch das 14 N-Isotop vermieden und die Zuordnung der Schwingungsspektren erleichtert. Während der hier vorliegenden Untersuchungen stellte sich heraus, daß die Beschreibungen der Dar-stellung von Trimethylzinnazid [5, 6] mangelhaft sind. Es entstehen im allgemeinen die beiden Titelverbindungen nebeneinander, und häufig wur-den die Analysenwerte der einen Verbindung und die spektroskopischen Daten der anderen mit-geteilt [6, 7]. Das Auftreten eines 1:1-Komplexes Me3SnN3 • Me3SnOH wurde mit der unterschied-lichen Probenvorbereitung vor der spektroskopi-schen Messung [7] oder der inzwischen eingetretenen Hydrolyse [8] erklärt. Die Zuordnung der Mößbauer-Parameter wurde berichtigt [9]. Im folgenden sollen die physikalischen Daten des Trimethylzinnazids (1) und des Trimethylzinn-azid • Trimethylzinnhydroxids (2) einander gegen-übergestellt werden. Darstellung und Eigenschaften 1 kann aus Trimethylzinndimethylamid durch Umsetzung mit Stickstoffwasserstoffsäure gewon-nen werden [10]. Die meisten Autoren [4-9, 11] ver-wenden zur Darstellung Trimethylzinnchlorid und 
  Reference    Z. Naturforsch. 34b, 536—540 (1979); eingegangen am 30. November 1978/5. Februar 1979 
  Published    1979 
  Similar Items    Find
 DEBUG INFO      
 TEI-XML for    default:Reihe_B/34/ZNB-1979-34b-0536.pdf 
 Identifier    ZNB-1979-34b-0536 
 Volume    34 
119Author    Reinhard Matthes, Hans-Uwe SchusterRequires cookie*
 Title    Synthese und Struktur der Phasen K2CdSn und K2CdPb Synthesis and Structure of the Phase K2CdSn and K2CdPb  
 Abstract    orthorhombically, with space group Ama2 = Cmc2, a = 645.8 pm, b = 860.2 pm, c — 1095.5 pm. The structure is built of a potassium-3D-net forming eight-edged channels parallel to the a-axis; these channels are penetrated by infinite Cd-Pb-zigzag-chains. The powder-diagram shows the homologous phase K2CdSn (a = 643.2 pm, b = 854.3 pm, c = 1087.7 pm) to be isotypic to K2CdPb. 
  Reference    Z. Naturforsch. 34b, 541—543 (1979); eingegangen am 28. Dezember 1978 
  Published    1979 
  Keywords    Ternary Phases, Potassium, Cadmium, 4B-Element, Crystal Data K2CdPb crystallizes 
  Similar Items    Find
 DEBUG INFO      
 TEI-XML for    default:Reihe_B/34/ZNB-1979-34b-0541.pdf 
 Identifier    ZNB-1979-34b-0541 
 Volume    34 
120Author    ChrL. TeskeRequires cookie*
 Title    Darstellung und Kristallstruktur von Silber-Barium-Thiogermanat(IV). Ag2BaGeS4 Preparation and Crystal Structure of Silver-Barium-Thiogermanate(IV). Ag2BaGeS4  
 Abstract    Ag2BaGeS4 was prepared for the first time and the crystal structure determined using X-ray methods, a — b = 682,g; c = 801,7 pm, Space group I 4 2 m (No. 121) tetragonal. The atomic parameters and interatomic distances are reported and the structure is discussed. 
  Reference    Z. Naturforsch. 34b, 544—547 (1979); eingegangen am 16. Januar 1979 
  Published    1979 
  Keywords    Quaternary Thiogermanates(IV), Silver, Crystal Structure 
  Similar Items    Find
 DEBUG INFO      
 TEI-XML for    default:Reihe_B/34/ZNB-1979-34b-0544.pdf 
 Identifier    ZNB-1979-34b-0544 
 Volume    34 
Prev
...
6
7
8
9
10
...
Next