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Facet   section ZfN Section B:Volume 030  [X]
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1975 (239)
81Author    Requires cookie*
 Title    Darstellung und Struktur der Phase Li13Sn5 und die strukturelle Verwandtschaft der Phasen in den Systemen L i-Sn und Li-Pb The Preparation and Crystal Structure of L i13Sn5 and the Structural Relations Between the Phases of the Systems L i-Sn and L i-P b  
 Abstract    U r s u l a F r a n k u n d W i k i n g M ü l l e r A bteilung II für Anorganische Chemie, E d u ard -Z in tl-In stitu t der T echnischen H ochschule D arm stadt L ithium Stannide, Interm etallic Compound A new com pound L i13Sn5 has been prepared and its crystal structure has been determ ined, It_crystallizes trigonal, a = 4.70 ± 0.01 Ä, c = 17.12 ^ 0.04 Ä , c/a = 0.2745, space group P 3 m l -D |d, in an ordered bcc d erivative structure. Structural relations to other com pounds o f th e system s L i-S n and L i-P b w ith sim ilar atom ic arrangem ents are shown. The S n -S n and P b -P b -d ista n ces are discussed in connection w ith th e valence rule18. 
  Reference    (Z. Naturforsch. 30b, 316—322 [1975]; eingegangen am 6. Februar 1975) 
  Published    1975 
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 Identifier    ZNB-1975-30b-0316 
 Volume    30 
82Author    Requires cookie*
 Title    Reaktionen von Pentafluorbenzolsulfen  
 Abstract    , -sulfin-und -sulfonsäurechlorid mit Natrium -bis(trim ethylsilyl)-am id Reactions of Pentafluorobenzenesulfenyl, -sulfinyl, and -sulfonyl Chlorides with Sodium-bis(trimethylsilyl) Amide D i e t e r R i n n e u n d A r m a n d B l a s c h e t t e L ehrstuhl A und In stitu t für Anorganische Chem ie der T echnischen U n iv ersitä t B raunschw eig Pentafluorobenzenesulfenic a cid -bis (trim eth ylsilyl) -am ide, Pentafluorobenzenesulfinic acid-bis(trim ethylsilyl)-am ide, Sodium -pentafluorobenzenesulfinate B y reaction w ith N aN [Si(C H 3)3]2, th e chlorides C6F 5SC1, C6F sS(0)C1, and C6F 5S 0 2C1 are converted into C6F 6SN [Si(C H 3)3]2, C6F 5S (0)N [S i(C H 3)3]2, and N a+[C6F 5S 0 2]~, respec­ tively. In this instance the reactivity p attern o f th e pentafluorophenyl com pounds does n ot differ from th a t o f similar phenyl derivatives. 
  Reference    (Z. Naturforsch. 30b, 323—326 [1975]; eingegangen am 3. Januar/20. Februar 1975) 
  Published    1975 
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 Identifier    ZNB-1975-30b-0323 
 Volume    30 
83Author    Requires cookie*
 Title    Phosphoryl-und Thiophosphoryl-schwefeloxiddifluoridimide Phosphoryl-and Thiophosphoryl-sulfuroxidedifluorideimides  
 Abstract    M a n f r e d F e s e r , R a i n e r H ö f e r u n d O s k a r G l e m s e r Anorganisch-Chem isches In stitu t der U n iversität G öttingen Phosphorylsulfuroxidedifluorideim ides, Thiophosphoryl-sulfuroxidedifluorideim ides The phosphorylhalides O P F 2Cl, O PFCl2 and OPCl3 react w ith A g + N S (0)F 2-(1) to yield 
  Reference    (Z. Naturforsch. 30b, 327—329 [1975]; eingegangen am 27. Januar 1975) 
  Published    1975 
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 Identifier    ZNB-1975-30b-0327 
 Volume    30 
84Author    Requires cookie*
 Title    Elektrochemische Synthesen, I I 1 Die elektrochemische Reduktion von chemisorbiertem CO Electrochemical Syntheses, I I 1 The Electrochemical Reduction of Chemisorbed CO  
 Abstract    G e o r g B o c k m a i r und H e i n z P. F r it z A norganisch-chem isches In stitu t der T echnischen U niversität M ünchen E lectrochem ical R eduction, Carbon-m onoxide I t was shown b y cyclovoltam m etry th a t carbon-m onoxide dissolved in organic electrolyte can be reduced irreversibly at N i-, Co-, and T i-electrodes. A dependance o f th e potential on the m etal w as evid en t, corresponding to chem isorption and subsequent reduction o f CO. 
  Reference    (Z. Naturforsch. 30b, 330—333 [1975]; eingegangen am 7. März 1975) 
  Published    1975 
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 Identifier    ZNB-1975-30b-0330 
 Volume    30 
85Author    Requires cookie*
 Title    Polyphosphato van adates  
 Abstract    F r i t z P r e u s s u n d H e i n r i c h S c h u g Fachbereich Chemie der U n iversität K aiserslautern und In stitu t für A norganische Chemie der F reien U n iv ersitä t Berlin P olyphosphatovanadates, *H NM R Spectra, IR Spectra Y ellow phosphatovanadates M20 • V 20 5 • P 20 5 • H 20 (M = Iv, R b, Cs, N H 4), 2 K 20 • V 20 5 • P 20 5 and M20 • 2 V 20 5 • P 20 5 • aq (M = K , R b , N H 4) are prepared; their properties studied b y chem ical reactions, *11 N M R and IR spectroscopy in d icate a polym eric con stitu tion o f these com pounds. N o polyp h osp h atovan ad ic acid can be isolated ; condensation reactions in highly containing an excess o f sodium dihydrogei V P 0 5 • 2 H 20 . 
  Reference    (Z. Naturforsch. 30b, 334—339 [1975]; eingegangen am 30. Januar/6. März 1975) 
  Published    1975 
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 Identifier    ZNB-1975-30b-0334 
 Volume    30 
86Author    Requires cookie*
 Title    Beiträge zur Chemie des Phosphors, 601 Zur Kenntnis des a-Tetraphosphor-trithio-dijodids Contributions to the Chemistry of Phosphorus, 601 A bout a-Tetraphosphorus-trithio-diiodide  
 Abstract    M a r i a n n e B ä u d l e r , B e r n h a r d K l o t h , D i e t e r K o c h u n d E l m a r T o l l s In stitu t für Anorganische Chemie der U n iv ersitä t K öln P hosphorus-thioiodides, Phosphorus Sulfur B icyclus, 31P N M R Param eter, IR Spectrum The 'broad single lin e' a t — 127 ppm (from 85% H 3P 0 4), reported in th e literature for th e 31P NM R spectrum o f a-P 4S 3J 2, could be resolved in to 10 lines w hich form together w ith also d etected outer signals o f low in ten sity an A A 'B B ' sy stem w ith 24 observable lines. Therefore, a -P 4S3J 2 has th e sam e bicyclic m olecular structure 1 in solution as in th e solid state. T he chem ical sh ifts o f the atom s P a and P B, determ ined b y analysis o f th e spectrum , have th e very sm all difference o f 3.68 ppm , which m ay be caused b y an accidental com p en ­ sation o f su b stitu en t and ring tension effects. The infrared spectrum o f a-P 4S 3J 2 is co n sist­ en t w ith form ula 1 too. 
  Reference    (Z. Naturforsch. 30b, 340—342 [1975]; eingegangen am 13. Februar 1975) 
  Published    1975 
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 Identifier    ZNB-1975-30b-0340 
 Volume    30 
87Author    Requires cookie*
 Title    Beiträge zur Chemie des Bors, L X X II1 Einige Untersuchungen an Arsin-Boranen Contributions to the Chemistry of Boron, L X X II1 Some Studies on Arsine Boranes  
 Abstract    R i c e a r d G o e t z e u n d H e i n r i c h N ö t h In stitu t für A norganische Chemie der U n iversität München Triphenylarsine Boranes, D iphenylarsine Boranes Tetrartiethyldiarsine Borane, T rim ethylsilyl-diorganylarsine Boranes, 1X B N M R D ata 
  Reference    (Z. Naturforsch. 30b, 343—349 [1975]; eingegangen am 14. März 1975) 
  Published    1975 
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 Identifier    ZNB-1975-30b-0343 
 Volume    30 
88Author    S.Requires cookie*
 Title    Polarographie Study of the Electrode Reaction of Z n (II) in Formamide and Dim ethyl - formamide  
 Abstract    u d h i n d r a S w a r u p S h a r m a a n d M u k h t a r S i n g h Z inc(II), Form am ide, D im ethylform am ide, Polarographie S tu d y The reduction o f Zn(II) at th e d. m. e. has been studied in aqueous m ixtu res o f form am ide and dim ethylform am ide. The general polarographic characteristics h a v e been determ ined, using 0.1 M X a X O , 3 as th e supporting electrolyte. T he reduction o f Z n(II) in these organic solven ts is irreversible and diffusion controlled. The kinetic param eters, ana and h have been calculated separately b y K o u t e c k y and D e l a h a y treatm en ts. The change o f polarographic characteristics and kinetic param eters is explained in term s of solvation of th e m etal ion in these solvents. The electrocapillary curves in th e presence o f these solven ts h ave also been studied. 
  Reference    (Z. Naturforsch. 30b, 350—354 [1975]; received December 3 1974) 
  Published    1975 
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 Identifier    ZNB-1975-30b-0350 
 Volume    30 
89Author    Requires cookie*
 Title    Photoaquation of Carbonylpentacyanoferrate(II)  
 Abstract    A r n d V o g l e r a n d H o r s t K u n k e l y In stitu t für Chemie, U niversität R egensburg C yanoferrate(II) Com plexes, A bsorption Spectra, P hotochem istry U pon ligand field excitation (300 n m -370 nm irradiating w avelengths) aqueous F e(C N)5C 0 3~ underw ent a p h otosu bstitu tion under release o f CO and form ation o f F e(C N)5H 20 3~ w ith the quantum yield 0.9. 
  Reference    (Z. Naturforsch. 30b, 355—357 [1975]; eingegangen am 18. März 1975) 
  Published    1975 
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 Identifier    ZNB-1975-30b-0355 
 Volume    30 
90Author    Requires cookie*
 Title    Neue Methoden zur spektrophotometrischen pK-Wertbestimmung, III Dreistufige Titrationssysteme New Methods for Spectrophotometric Determ ination of pK -Values, I I I T itration of Trivalent Protolytes  
 Abstract    R ü d i g e r B l u m e u n d J ü r g e n P o l s t e r P hysikalisch-chem isches In stitu t der U n iversität Tübingen Spectrophotom etric T itration, Absorbance Diagram s, pK -V alues, P olyp rotolytes The spectrophotom etric titration o f three-step sequential dissociation equilibria is a n a ­ lyzed b y m eans o f tw o dim ensional absorbance diagrams. The evaluation o f p K x and p K 3 as w ell as o f th e absorbance coefficients o f both am pholytes is m ade by th e uniform segm ents a t th e beginning and end o f th e titration. N ew m ethods o f evalu atin g th e valu e o f p K 2 precisely and w ith o u t difficulty even at sm all pK-differences are described. B y m eans o f several independent criteria th e pK -valu es and th e absorbance coefficients o f th e am p h olytes can be exam ined. The titration o f (l,2,4)-benzenetricarboxylic acid illustrates th e new m ethod. 
  Reference    (Z. Naturforsch. 30b, 358—372 [1975]; eingegangen am 20. Dezember 1974) 
  Published    1975 
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 Identifier    ZNB-1975-30b-0358 
 Volume    30 
91Author    1h NmRequires cookie*
 Title    H-NM R-und IR-spektroskopische Untersuchungen zur Konformation von Hydroxy - methyl-Substituenten in 2.3-Stellung an Hexachlorbicycloheptenen  
 Abstract    -an d IR -S pectroscopic C onform ational Studies on H ydro x y m eth y l S u b stitu en ts in th e 2,3 P ositions of H exachlorobicycloheptenes H e l l m u t S i n g e r *, I n g o l f S c h u p h a n ** u n d K a r l h e i n z B a l l s c h m i t e r Mono Hexachloro-bicycloheptenes and heptadienes with hydroxym ethyl-substituents in the 2 and 3 position show non-equivalence of the methylene protons in their NMR spectra. This is caused both by hindered rotation and the asymmetry of the molecules. For some molecules the spectroscopic data allow conclusions to be made concerning the con­ formation of the substituents. 
  Reference    (Z. Naturforsch. 30b, 373—377 [1975]; eingegangen am 9. Dezember 1974) 
  Published    1975 
  Keywords    -hydroxymethyl-bicycloheptenes, Bis-hydroxymethyl-bicycloheptenes, Heptadienes, Hindered Rotation, Hydrogen Bonding 
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 Identifier    ZNB-1975-30b-0373 
 Volume    30 
92Author    Requires cookie*
 Title    Darstellung und Eigenschaften von Phosphidbromiden des Calciums, Strontiums und Bariums Preparation  
 Abstract    P re p a ra tio n an d P roperties of Phosphide B rom ides o f Calcium, S tro n tiu m , an d B arium C l a u s H a d e n f e l d t u n d W i l f r i e d K o s i o l The phosphide bromides M2PBr with M = Ca, Sr, Ba were prepared by reaction of metal, red phosphorous, and metal bromide corresponding a molar ratio M : P : Br = 2 :1 :1 . In the system s "Ca3P 2"-CaBr2 and "Sr3P 2"-SrB r2 phase analytical investigations were made by varying the molar ratio M : P : Br. A cubic and a rhombohedral Ca2PBr-and Sr2PBr-phase as well as rhombohedral B a2PBr were obtained. The cubic phases are stabilized by an excess of MBr2, the rhombohedral phases of Ca2PBr and Sr2PBr by an excess of "M3P 2" beyond the molar ratio 2:1:1. Analytical results, densities and lattice constants of the phases are given. 
  Reference    (Z. Naturforsch. 30b, 378—384 [1975]; eingegangen am 10. Februar 1975) 
  Published    1975 
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 Identifier    ZNB-1975-30b-0378 
 Volume    30 
93Author    Requires cookie*
 Title    Metallkomplexe mit Tetrapyrrol-Liganden, XIV1 * Eisenporphodimethene: Sterisch und elektronisch modifizierte Häme und Hämine  
 Abstract    M etal Complexes of T etrapyrrole Ligands, X IV 1 Iro n P o rp h o d im eth en es: Sterically and E lectronically Modified H em es an d H em ins J o h a n n W. B u c h l e r u n d K . L am L a y Iron An air-stable porphodimethene, namely a, y-dimethyl-a, y-dihydrooctaethylporphyrin [H 2(OÄPMe2)*; (1)] is metalated with Fe(CO)5/I2 in toluene to yield an air-stable binuclear iron(III) porphodimethene, /i-oxobis(a, y-dimethyl-a, 
  Reference    (Z. Naturforsch. 30b, 385—392 [1975]; eingegangen am 27. Februar 1975) 
  Published    1975 
  Keywords    Porphyrins, Iron Porphodimethenes, Hemes, Hemins 
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 Identifier    ZNB-1975-30b-0385 
 Volume    30 
94Author    Requires cookie*
 Title    Kinetik und Mechanismus der Substitutionsreaktionen von Komplexverbindungen, X L v m * Einfluß der Wasserstoffionenkonzentration auf die Aquotisierungskinetik des Nitro-aquo- bis-dim ethylglyoxim ato-kobalt(III)-Nichtelektrolytes Cobalt(III) Complexes, Dim ethylglyoxim e Derivatives, Nitro-cobalt(III) complexes, Aquation of Nitro Complexes  
 Abstract    K inetics and M echanism o f th e S u b stitu tio n R eactions o f Complexes, X L V III. Influence of th e H ydrogen Io n C oncentration on th e A q u atio n K inetics of th e N itro-aquo-bis-dim ethylglyoxim ato-cobalt(III)nonelectrolyte J . Z s a k ó, C s. V á r h e l y i , Z . F i n t a u n d J . K i s s -J a k a b 
  Reference    (Z. Naturforsch. 30b, 393—398 [1975]; eingegangen am 27. Januar 1975) 
  Published    1975 
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 Identifier    ZNB-1975-30b-0393 
 Volume    30 
95Author    Requires cookie*
 Title    The UV Photolysis (x = 185 n m ) o f Liquid Methyl rc-Propyl Ether  
 Abstract    H e i n z -P e t e r S c h u c h m a n n a n d Cl e m e n s v o n S o n n t a g Methyl The main products of the 185 nm photolysis of liquid methyl n-propyl ether (quantum yields in parentheses) are n-propanol (0.70), m ethane (0.29), «ec-butyl methyl ether (0.20), methanol (0.16), propionaldehyde (0.13), 3,4-dimethoxyhexane (0.09), ethane (0.08), and ethyl n-propyl ether (0.08). The quantum yields of further 24 minor products have been measured. The quantum yield of the sum of primary photochemical processes, the main ones of which are the homolytic scissions of the C -0 bonds (reactions i and ii), is close to unity. 
  Reference    (Z. Naturforsch. 30b, 399—403 [1975]; received January 27 1975) 
  Published    1975 
  Keywords    n-Propyl Ether, UV Photolysis, Quantum Yields, Radicals, Molecular Elimination Processes 
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 Identifier    ZNB-1975-30b-0399 
 Volume    30 
96Author    C.Requires cookie*
 Title    Die Einwirkung von Bromierungsmitteln auf Cyclopropenone  
 Abstract    yclopropenone C hem istry, V I Conversion of Cyclopropenones w ith B rom inating Agents S ig r id S. D e h m l o w u n d E c k e h a r d V. D e h m l o w Addition The synthesis of m ethyl-phenylcyclopropenone (la) is decribed. Bromination of this and of diphenylcyclopropenone yields saltlike complexes 2 which are in equilibrium with their components. Di-w-propylcyclopropenone and bromine give the ring opened product 3d. l a and N-bromosuccinimid give 4 and 5, phenyl brominated derivatives, in sulfuric acid. W ith cupric bromide substituted /S-bromoacrylic acids are formed along with cyclopropenone dimers (7). 
  Reference    (Z. Naturforsch. 30b, 404—408 [1975]; eingegangen am 26. November 1974) 
  Published    1975 
  Keywords    Complex, Ring Opening, Catalized Dimerization 
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 Identifier    ZNB-1975-30b-0404 
 Volume    30 
97Author    S.Requires cookie*
 Title    Kinetics and Possible Mechanisms o f the Ce(IY) Oxidation of EDTA, CDTA, DTPA and NTA in Perchloric Acid Media  
 Abstract    a m ir B. H a n n a , W i l l i a m R . C a r r o l l , S a l e m A. A t t i g a , a n d W i l l i a m H . W e b b The rates of oxidation of four chelating agents with Ce(IV) in HC104 solutions, have been studied by the stopped-flow technique. The rates first increase with increasing acidity, reach maxima which are characteristic of the chelating agent and the medium, then progressively decrease with further increasing acid concentration. A t their maximum reactivities, the tendencies for oxidation decrease in the following order: 2rans-l,2-dia-minocyclohexane tetraacetic acid (CDTA) > ethylenedinitrilotetraacetic acid (EDTA) > diethylenetriaminepentaacetic acid (DTPA) > nitrilotriacetic acid (NTA). A mech­ anism for the oxidation of EDTA, involving Ce4+ and Ce(OH)3+ and both unprotonated and monoprotonated chelating agent, is proposed. 
  Reference    (Z. Naturforsch. 30b, 409—415 [1975]; received December 27 1974) 
  Published    1975 
  Keywords    Oxidation, Amino Acids, Kinetics, Mechanisms, Cerium(IY) 
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 Identifier    ZNB-1975-30b-0409 
 Volume    30 
98Author    Requires cookie*
 Title    Radiation Chemistry o f Carbohydrates, VI* y-Radiolysis o f Glucose in Deoxygenated N20 Saturated Aqueous Solution  
 Abstract    M ir a l D i z d a r o g l u , D i e t e r H e n n e b e r g , G e r h a r d S c h o m b u r g , a n d Cl e m e n s v o n S o n n t a g In the y -radiolysis of deoxygenated N 20 -saturated aqueous solutions of D-glucose (10-2 M, 1 • 1019 — 4 • 1019 eV/g, dose rate 4.3 • 1018 eV/g • h at 25 °C), the following products have been identified: Gluconic acid (1), 2-deoxy-gluconic acid (2), arabinose (3), 2-deoxy-ribose (4), 5-deoxy-gluconic acid (5), glucosone (6), 3-deoxy-glucosone (7), 3-keto-glucose (8), [2-deoxy-3-keto-glucose (9), 4-deoxy-3-keto-glucose (10)]3, 4-keto-glucose (11), 3-deoxy-4-keto-glucose (12), 5-deoxy-4-keto-glucose (13), 5-keto-glucose (14), 2-deoxy-5-keto-glucose (15), 4-deoxy-5-keto-glucose (16), 6-deoxy-5-keto-glucose (17), glueo-hexodialdose (18), 5-deoxy-xylo-hexodialdose (19), ribose (20), xylose (21), erythrose (22), threose (23), 3-deoxy-pentulose (24), 2-butanone-(l,4)-diol (25), and dihydroxy-acetone (26). G-values were also determined. In the primary processes OH radicals and H atoms from the radiolysis of the solvent water abstract carbon bound hydrogen atoms from D-glucose to give all six possible primary glucosyl radicals. The observed products are formed in disproportionation reactions of the primary glucosyl radicals (1, 6, 8, 11, 14, 18) or of sugar radicals which originate from the primary glucosyl radicals by water elimination (2,, rearrangements (5, 14, 15), or loss of carbon monoxide (3, 4, 20). Products 1-5 and probably 20 have primary glucosyl radicals with the odd electron at C-l as precursors. Radicals with the free spin at C-2 give rise to the products 6 and 7. Attack at C-3 yield products 8-10, at C-4 products 11-13, at C-5 products 14-17, and an attack at C-6 products 18 and 19. Products 21-26 are formed in very low yields and hence are of minor importance. Their mechanism of formation has not been investigated. 
  Reference    (Z. Naturforsch. 30b, 416—425 [1975]; received January 28 1975) 
  Published    1975 
  Keywords    D-Glucose, y-Radiolysis, Glucosyl Radicals, Deoxy-sugars, Keto-glucoses 
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 Identifier    ZNB-1975-30b-0416 
 Volume    30 
99Author    P.Requires cookie*
 Title    Furoquinolines, V III1 Synthesis of 2,3-Dihydro-3-m ethoxyfuro(2,3-b)qiiinolines 3-Vinyl-2-quinolones, 2,3-Dihydro-3-methoxyfuro(2,3-b)quinolines  
 Abstract    L a k s h m i n a r a y a n a , K . K a n a k a r a j a n , a n d P. S h a n m u g a m 
  Reference    (Z. Naturforsch. 30b, 426—429 [1975]; received December 27 1974) 
  Published    1975 
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 Identifier    ZNB-1975-30b-0426 
 Volume    30 
100Author    A. O., W.J SRequires cookie*
 Title    Axial Preference of Methylthio Substituent in Dioxaphosphorinanyl Ring System  
 Abstract    The spatial disposition of a 2-methvlthio group in the 4-m ethyl-1,3,2-dioxaphosphorin­ anyl ring system was studied by stereochemical correlation, X H, 13C and 31P NMR. It has been established that a CH3S-group prefers an axial orientation much more strongly than does a m ethoxy group. 
  Reference    (Z. Naturforsch. 30b, 430—436 [1975]; received February 4 1975) 
  Published    1975 
  Keywords    ) 2-Methylthio-l, 3, 2-dioxaphosphorinans, Synthesis, Spectral Characteristics, Conformation 
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 Identifier    ZNB-1975-30b-0430 
 Volume    30 
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