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41Author    Z. NaturforschRequires cookie*
 Title    Synthesis  
 Abstract    o f N itrene C om plexes w ith N -T rim ethylsilylaniline I. Characterisation and Crystal Structure o f [R e(N Ph)C l3(E t2PhP)2] and [Re(N Ph)Cl3(Ph3P)2] • 1/2CHC13 U rsula W ittern, Joachim Strähle*, U lrich A bram rra»^-mt'r-Trichlorobis(diethylphenylphosphine)phenylnitrene rhenium(V), [Re(NPh)Cl3-(Et2PhP)2], has been synthesized from [ReOCl3(Et2PhP)2] and N-trim ethylsilylaniline, while rrans-ttZfr-trichlorophenylnitrenebisCtriphenylphosphine) rhenium(V), [Re(NPh)Cl3(Ph3P)2] has been obtained via a novel route, from (Bu4N)[ReOCl4] and N-trim ethylsilylanilin. The products were studied by mass spectrometry, IR spectroscopy and X-ray diffraction. rrafls-m er-[Re(NPh)Ch(Et-'PhP)2] crystallizes in the m onoclinic space group P2i/n with a = 1498.5(3), b = 1068.6(1), c = 1784.0(4) pm and ß = 91.28(1)°, Z = 4. The rhenium atom exhibits a distorted octahedral coordination with the phosphine groups in trails positions, and the Cl ligands in a meridional arrangement. The R e = N -C moiety is linear with a bond angle o f 169,4(5)°and a R e = N bond length o f 171.8(6) pm. [ R e (N P h) C h (P h 3 P) i ] 0.5 C H C I 3 c r y s t a l l i z e s in th e t r i c l i n i c s p a c e g r o u p P i w i t h a = 1232.1 (4), b= 1431.6(5), c = 2236.6(8) pm, a = 89.19(2)°, ß = 80.50(2)°and 7 = 88.26(2)°, Z = 4. The asymmetric unit contains two symmetry independent complex m olecules o f approxima­ tely the same structure, with Cl atoms meridionally arranged and the phosphine groups in trans positions. The coordination geometry is a distorted octahedron. The almost linear R e = N -C m oieties have R e = N bond lengths o f 170.2(7) and 170.8(7) pm, respectively, and R e -N -C angles o f 173.3(6)°and 175.0(7)°. 
  Reference    Z. Naturforsch. 50b, 997 (1995); eingegangen am 15. Februar 1995 
  Published    1995 
  Keywords    Rhenium(V) C om plexes, Phenylnitrene Com plexes, Crystal Structure, Mass Spectra 
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 TEI-XML for    default:Reihe_B/50/ZNB-1995-50b-0997.pdf 
 Identifier    ZNB-1995-50b-0997 
 Volume    50 
42Author    Frederick Kurzer, Dennis ChapmanRequires cookie*
 Title    The Oxidation of Partially Acylated Myoinositols  
 Abstract    1,3,4,6-Tetrakis-and 1,3,4,5,6-pentakis-acylmyoinositols are obtained by the controlled cat­ alyzed acylation of myoinositol. The extent of the substitution depends both on the reaction conditions and the structure o f the acylating agent, including steric factors. Chromic acid oxidation converts the acylmyoinositols into the corresponding 2-ketones. Under electron impact, the compounds undergo stepwise deacylation. 
  Reference    (Z. Naturforsch. 51b, 68—7 [1996]; received May 17 1995) 
  Published    1996 
  Keywords    Tetrakisacylmyoinositols, Pentakisacylmyoinositols, Acylated M yoinososes-2, Mass Spectra, M yoinositol Esters 
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 TEI-XML for    default:Reihe_B/51/ZNB-1996-51b-0068.pdf 
 Identifier    ZNB-1996-51b-0068 
 Volume    51 
43Author    Jochen Ellermann, Adolf VeitRequires cookie*
 Title    Chemie polyfunktioneller Moleküle, 90 [1] Antimon-, sauerstoff-, schwefel-und selenhaltige Käfigverbindungen mit Adamantan-, Noradamantan-und Nortricyclan-Struktur Chemistry of Polyfunctional Molecules, 90 [1] Cage Compounds with Adamantane-, Noradamantane-and Nortricyclane-Structure Containing Antimony, Oxygen, Sulfur and Selenium  
 Abstract    R eactions o f l,l,l-tris(d ich lorostib in om eth yl)eth an e, CH 3C (C H 2SbCl2)3 (1), with water afford, depending on the molar ratios o f the com ponents, the adamantane structured C H 3C (C H 2SbO)3 (2) or Sb40 6, whereas with H 2S only the heteroadam antane CH 3C (C H 2SbS)3 (3) is obtained. With N aSeH com pound 1 forms C H 3C (C H 2SbSe)3 (4) accom panied by the heteronoradamantane C H 3C (C H 2Sb)3Se2 (5). Several attem pts to prepare an antimony and tellurium containing adam antane or noradamantane failed, as 1 was reduced by Na2Te yielding the heteronortricyclane CH 3C (C H 2Sb)3 (6). O xidation o f the latter in tetrahydrofuran by air gives Sb40 6. The new com pounds have been characterized by m ass, infrared, Ram an, and as far as possible, by 'H N M R spectroscopy. 
  Reference    Z. Naturforsch. 40b, 948 (1985); eingegangen am 9. April 1985 
  Published    1985 
  Keywords    H etero Cage Com pounds, A ntim ony, Mass Spectra, 'H NM R Spectra, Vibrational Spectra 
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 TEI-XML for    default:Reihe_B/40/ZNB-1985-40b-0948.pdf 
 Identifier    ZNB-1985-40b-0948 
 Volume    40 
44Author    Rolf Minkwitz, Jens Jakob, Andreas Kornath, Hans PreutRequires cookie*
 Title    Uber die Darstellung, spektroskopische Charakterisierung und Kristallstruktur von Trifluormethylazosulfbn-N,N-dimethylamid (CH3)2N S (0)2NNCF3 On the Preparation, Spectroscopic Characterization and Crystal Structure of Trifluoromethylazosulfon-N,N-dimethylamid (C H 3)2N S (0 )2NNCF3  
 Abstract    The reaction of Trifluoronitrosomethan with (CH3)2NS(0)2N H 2 in T H F and Na2C 0 3 as 
  Reference    Z. Naturforsch. 51b, 557—562 (1996); eingegangen am 10. O ktober 1995 
  Published    1996 
  Keywords    Trifluormethylazosulfon-N, N-dimethylamid, Vibrational Spectra, NM R Spectra, Mass Spectra, Crystal Structure 
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 TEI-XML for    default:Reihe_B/51/ZNB-1996-51b-0557.pdf 
 Identifier    ZNB-1996-51b-0557 
 Volume    51 
45Author    R. Olf Minkwitz, Jens JakobRequires cookie*
 Title    Uber die Bildung von N,N-Bistrifluormethylhydroxylammoniumsalzen (CF3)2N(X)OX+MF6-(X = H, D; M = As, Sb) On the Formation o f N,N-Bistrifluoromethylhydroxylammonium Salts (CF3)2N(X)O X+MF6-(X = H, D; M = As, Sb)  
 Abstract    The preparation of the N,N-Bistrifluoromethylhydroxylammonium hexafluorometallates (CF3)2N(X)OX+MF6~ (X = H, D; M = As, Sb) is reported. The new compounds were cha­ racterized by IR, Raman, Mass, 'H , ,9F and l3C NM R spectroscopy. In addition we present our approach to the preparation of H-subsituted N,N-Bistrifluoromethylhydroxylammonium hexafluorometallates (C F ^ N (Y)O H +M F6~ (Y = C H 3, Cl, F; M = As, Sb). 
  Reference    Z. Naturforsch. 52b, 958—964 (1997); eingegangen am 12. Mai 1997 
  Published    1997 
  Keywords    N, N-Bistrifluoromethylhydroxylammonium Hexafluoroarsenate, N, N-Bistrifluoromethylhydr-oxylammonium Hexafluoroantimonate, Vibrational Spectra, NMR Spectra, Mass Spectra 
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 TEI-XML for    default:Reihe_B/52/ZNB-1997-52b-0958.pdf 
 Identifier    ZNB-1997-52b-0958 
 Volume    52 
46Author    Requires cookie*
 Title      
 Abstract    The reaction of trifluoromethylchlorosulfane with an excess of hydrogensulfide yields trifluoromethyldisulfane. The new compound has been characterised by its IR, Raman, 19F and NMR, UY and mass spectrum, melting and boiling point and by vapour pres­ sure data. The result of some chemical reactions are reported. Furthermore, previously unreported NMR and mass spectral data of CF3SH, CF3S3CF3 and CF3S4CF3 are given. 
  Reference    (Z. Naturforsch. 30b, 169—174 [1975]; eingegangen am 12. Dezember 1974) 
  Published    1975 
  Keywords    Sulfur-fluorine Chemistry, NMR Spectra, IR Spectra, Raman Spectra, Mass Spectra 
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 TEI-XML for    default:Reihe_B/30/ZNB-1975-30b-0169.pdf 
 Identifier    ZNB-1975-30b-0169 
 Volume    30 
47Author    Manfred Weidenbruch, Helge PeselRequires cookie*
 Title    Tri-Jert-butylsiliciumpseudohalogenide Silicon Compounds with Strong Intramolecular Steric Interactions, VII [1] Tri-ferf-butylsilicon Pseudohalides  
 Abstract    Tri-£eri-butylchlorosilane reacts with potassium pseudohalides in the presence of catalytic amounts of the crown ether 18-crown-6 to give the tri-£er£-butylsilicon pseudo-halides (*-C4H9)3SiX (X = CN, NCO, NCS, N3) in good yields. These new compounds are characterized by IR, *H NMR, and mass spectra. In the absence of the crown ether no reaction occurs. Treating tri-£er£-butylsilane with AgX (X = CN, SCN) gives the silicon pseudohalides in low yields. 
  Reference    Z. Naturforsch. 33b, 1465—1467 (1978); eingegangen am 4. August 1978 
  Published    1978 
  Keywords    Tri4er£-butylsilicon Pseudohalides, Steric Hindrance, Crown Ether Catalysis, IR, Mass Spectra 
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 TEI-XML for    default:Reihe_B/33/ZNB-1978-33b-1465.pdf 
 Identifier    ZNB-1978-33b-1465 
 Volume    33 
48Author    Werner Zeiss, Kleomenis Barlos, 7. ^.Requires cookie*
 Title    Cyclotri(/ 5 -phospliazane) Cyclotri(A 3 -phosphazanes)  
 Abstract    P-perhalogenated cyclotri(A 3 -phosphazanes) 3 a, b are obtained from the reaction of 1 or 2 with excess PX3 (X = Cl, Br). Under mild reaction conditions 4—7 are found to be intermediates. The existence of a six-membered ring trimer is proven by NMR and mass spectroscopy. No dimer (XPNMe)2 could be detected. Nachdem uns kürzlich die Darstellung zweier per-alkylierter Cyclo£efra(/l 3 -phosphazane) (RPNMe)4, R = Me und Et, gelang [1], berichten wir hier über am Phosphor halogensubstituierte Cyclo tri(X z -phosphazane). Die PN-Verknüpfung erfolgt dabei in an sich längst bekannter Weise [2] durch Abspal-tung von Halogensilan aus Silylamin und Halogen-phosphan. 3 a, b sind aus dem Cyclotrisilazan (1) und dem Heptamethyldisilazan (2) jeweils mit einem Über-schuß von PX3 zugänglich. (MeNSiMe2)3 • 3 PX3 1 ~--<3Me2SiX2 3 PX-; Me I X 3 (Me3Si)2NMe 2 3a, X= Cl b, X= Br Unterbricht man die Umsetzung von PX3 mit 1 nach Abklingen der exothermen Reaktion, so findet man NMR-spektroskopisch hauptsächlich die Phos-phorverbindungen 4 und 5 neben geringen Mengen längerkettiger Verbindungen. Unter milden Bedin-gungen und in Dichlormethan als Lösungsmittel ge-lingt es jeweils, 7 nachzuweisen. Me Me 1 I X2P —N-SiMe2X X2P-N —PX2 4 5 X2P-N -SiMe3 6 Me Br Me 
  Reference    Z. Naturforsch. 34b, 423—425 (1979); eingegangen am 9. 0ktober/20. November 1978 
  Published    1979 
  Keywords    Cyclotri(A 3 -phosphazanes), Reaction Intermediates, Mass Spectra, NMR Spectra 
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 TEI-XML for    default:Reihe_B/34/ZNB-1979-34b-0423.pdf 
 Identifier    ZNB-1979-34b-0423 
 Volume    34 
49Author    Jochen Ellermann, Martin Lietz, Peter Merbach, Gerhard Thiele, Gerd ZoubekRequires cookie*
 Title    Chemie polyfunktioneller Liganden, 53 [1] Über methyl-substituierte Triarsa-trioxa-, Triarsa-trithia- und Triarsa-triaza-adamantane und über den stark aufgeweiteten Adamantan-Käfig im Schwefel-Derivat Chemistry of Polyfunctional Ligands, 53 [1] About Methyl-substituted Triarsa-trioxa-, Triarsa-trithia-and Triarsa-triaza-adamantanes and about the Strongly Spread Adamantane Cage in the Sulfur Derivative  
 Abstract    The reaction of l,l,l-tris(diiodarsinomethyl)ethane, CH3C(CH2Asl2)3 (1), with H2O, H2S and CH3NH2 in THF gives the adamantane cage compounds CH3C(CH2ASO)3 (4), CH3C(CH2ASS)3 (5) and CH3C(CH2ASNCH3)3 (6) in high yields. The crystal structure of 5 has been determinated by X-ray diffraction. The unit cell (space group P2i/w) contains 4 isolated molecules in a cubic closest packing. The heteroadamantane 5 has an enlarged cage structure with extremely spread C-C(H2)-As bond angles of 124° at the methylene carbon atoms. Some pharmacological properties of the adamantane derivatives 4 and 5 have been studied. All compounds have been characterized by mass spectrometry and infrared, Raman and X H NMR spectroscopy. 
  Reference    Z. Naturforsch. 34b, 975—982 (1979); eingegangen am 26. März 1979 
  Published    1979 
  Keywords    Heteroadamantanes, Vibrational Spectra, Mass Spectra, X H NMR, Molecular and Crystal Structure 
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 TEI-XML for    default:Reihe_B/34/ZNB-1979-34b-0975.pdf 
 Identifier    ZNB-1979-34b-0975 
 Volume    34 
50Author    J. Behrensdorf, W. PreetzRequires cookie*
 Title    Darstellung und Eigenschaften von ira7is-Dihalogeno-tetrakis(pyridin)osmium(II)-Komplexen Preparation and Properties of £raws-Dihalo-tetrakis(pyridine)osmium(II) Complexes  
  Reference    (Z. Naturforsch. 35b, 71—73 [1980]; eingegangen am 24. September 1979) 
  Published    1980 
  Keywords    £rans-Dihalo-tetrakis(pyridine)osmium(II), Adducts, IR, Raman Spectra, Mass Spectra 
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 TEI-XML for    default:Reihe_B/35/ZNB-1980-35b-0071.pdf 
 Identifier    ZNB-1980-35b-0071 
 Volume    35 
51Author    Emmanuel Chukwuemeka OkaforRequires cookie*
 Title    Structures of l-Phenyl-3-methyl-pyrazolone-5 and its Benzoyl Derivatives +  
  Reference    Z. Naturforsch. 35b, 1019—1023 (1980); received September 20/December 17 1979 
  Published    1980 
  Keywords    Benzoylated l-Phenyl-3-methyl-pyrazolones-5, NMR Spectra, Mass Spectra, IR Spectra 
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 TEI-XML for    default:Reihe_B/35/ZNB-1980-35b-1019.pdf 
 Identifier    ZNB-1980-35b-1019 
 Volume    35 
52Author    Jochen Eilermann, Martin LietzRequires cookie*
 Title    Chemie polyfunktioneller Liganden, 60 [1] Über Käfigverbindungen mit den Heteroelementen Arsen und Selen Chemistry of Polyfunctional Ligands, 60 [1] On Cage Compounds with the Heteroelements Arsenic and Selenium  
 Abstract    The reaction of l,l,l-tris(diiodoarsinomethyl)ethane, CH3C(CH2Asl2)3 (1) with NaAs(CeH5)2 in the molar ratio of 1:3 gives 4-methyl-l,2,6-triarsa-tricyclo[2,2,l,0 2 -6 ]-heptane, CH3C(CH2As)3 (2). The previously synthesized CH3C(CH2AsS)3 (4) can be de-sulphurated with triphenylphosphine to yield also 2. The reaction of 1 with NaSeH gives the new cage compound 6-methyl-l,3,4-triarsa-2,8-diselena-tricyclo[3,3,l,0 3 > 4 ]-nonane, CH3C(CH2As)3Se2 (5). 
  Reference    Z. Naturforsch. 35b, 1514—1517 (1980); eingegangen am 5. August 1980 
  Published    1980 
  Keywords    Hetero Cage Compounds, Synthesis, Vibrational Spectra, Mass Spectra, 1 H NMR Spectra 
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 TEI-XML for    default:Reihe_B/35/ZNB-1980-35b-1514.pdf 
 Identifier    ZNB-1980-35b-1514 
 Volume    35 
53Author    Jochen Ellermann, Martin LietzRequires cookie*
 Title    Chemie polyfunktioneller Liganden, 69 [1] Über drei Organo-Arsen-Käfigverbindungen mit Noradamantanstruktur Chemistry of Polyfunctional Ligands, 69 [1] Three Organo-Arsenic Cage Compounds with Noradamantane Structure  
 Abstract    The reaction of l.l.l-tris(diiodarsinomethyl)ethane, CH3C(CH2Asl2)3 (1), with H 2 C(COOC 2 H 5)2, H 2 C(COOCH 3)2 and H 2 C(COC 6 H 5)2 in presence of the auxiliary base (C 2 Hs)3N gives the noradamantane structured compounds CH3C(CH2As)3E2 [E = C(COOC 2 H 5)2 (2), C(COOCH 3) 2 (3) and C(COC 6 H 5) 2 (4)]. The new compounds have been characterized by mass spectrometry and infrared, Raman and X H NMR spectroscopy. 
  Reference    Z. Naturforsch. 36b, 1532—1537 (1981); eingegangen am 5. August 1981 
  Published    1981 
  Keywords    Arsenic Cage Compounds, Synthesis, Vibrational Spectra, Mass Spectra, X H NMR Spectra 
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 TEI-XML for    default:Reihe_B/36/ZNB-1981-36b-1532.pdf 
 Identifier    ZNB-1981-36b-1532 
 Volume    36 
54Author    W. Olfgang, S. G. Maass, AlfredW. HansonRequires cookie*
 Title    Wrightiin, a New Chlorinated Depside from Erioderma wrightii Tuck (Ascolichenes)  
 Abstract    The structure of wrightiin, a depside m etabolite of E rioderm a wrightii is shown by X-ray crystalo-graphy to be 2. The mass spectrum is anomalous. 
  Reference    Z. Naturforsch. 41b, 1589—1592 (1986); received January 8 1986 
  Published    1986 
  Keywords    Erioderm a wrightii, Lichen D epside, Methyl 3-Chloroevernate, Crystal Structure, Mass Spectra 
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 TEI-XML for    default:Reihe_B/41/ZNB-1986-41b-1589_n.pdf 
 Identifier    ZNB-1986-41b-1589_n 
 Volume    41 
55Author    Roland Köster, Günter SeidelRequires cookie*
 Title    Borverbindungen, LXXXI [1] Neue Organobor-Sulfide — Herstellung und Anwendung Boron Compounds, LXXXI [1] New Organoboron Sulfides — Preparation and Uses  
  Reference    Z. Naturforsch. 43b, 687—693 (1988); eingegangen am 2. Dezember 1987 
  Published    1988 
  Keywords    Bis(l, 5-cyclooctanediylboryl)sulfides, Monosulfide/Disulfide Conversions, Mass Spectra, NMR Spectra, Sulfidation Reagent 
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 TEI-XML for    default:Reihe_B/43/ZNB-1988-43b-0687.pdf 
 Identifier    ZNB-1988-43b-0687 
 Volume    43 
56Author    WilfriedA. Königa, Holger Faascha, Holger Heitsch3, Cornelia Colberga, BjörnM H AusenRequires cookie*
 Title    Synthese von seitenkettenmodifizierten Analogen des Allergens Primin Synthesis of Side-Chain-Modified Analogues of the Allergen Primin  
 Abstract    Benzoquinones such as primin (2-methoxy-6-pentyl-l ,4-benzoquinone) from Primula ob-conica H A N C E (Primulaceae) are known to be strong sensitizers and thus the source of severe allergic contact derm atitis (cell-mediated type of allergy). In order to determine the relation­ ship between sensitizing capacity and chemical structure the synthesis of 19 side-chain-modi-fied analogues of primin was carried out. With each of these primin derivatives 10 guinea pigs were sensitized using a modified FCA-m ethod (FCA = Freund's complete adjuvant). Elicita­ tion was done open epicutaneously with 0.001 molar concentrations. In these sensitization ex­ periments 2-methoxy-6-alkyl-l ,4-benzoquinones (chain length C , -C 15) showed ascending sen­ sitizing potency with increasing number of the side chain carbon atom s reaching maximum activity at an alkyl chain of 10 to 11 carbons. Beyond this point a decrease o f the sensitizing potency in correlation with a further prolongation of the side chain was observed. 
  Reference    Z. Naturforsch. 48b, 387—393 (1993); eingegangen am 13. Juli 1992 
  Published    1993 
  Keywords    Primin, 6-Alkyl-2-methoxy-l, 4-benzoquinones, Allergens, 'H N M R Spectra, Mass Spectra 
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 TEI-XML for    default:Reihe_B/48/ZNB-1993-48b-0387.pdf 
 Identifier    ZNB-1993-48b-0387 
 Volume    48 
57Author    LutzD. Ahlenburg, A.Lexander WolskiRequires cookie*
 Title    Oligophosphan-Liganden, XXXIX*  
 Abstract    (lS,2S)-fraw s-C yclopentan-l,2-diyl-bis(phosphan), C5H 8(P H 2)2? durch Reduktion eines diastereomerenreinen Cyclopentandiyl-bis(dioxaphospholans) O ligophosphine Ligands, X X X IX . (1 5,25')-rra/t5-C yclopentane-l,2-diyl-bis(phosphine), C5FI8(P H 2)2, by R eduction of a D iastereom erically Pure C yclopentanediyl-bis(dioxaphospholane) C hristine E ckert, The title compound (S, S)-2, has been obtained by reduction with Li[A lH 4] o f the cyclopen-tane-l,2-diyl-bis(l',3',2'-dioxaphospholane) (1 5 ,2 S)-frans-C5H 8[P (0 C H (C 0 2Pr-/)-(/ ?) -)2]2, (S, 5")-l, which itself was isolated in diastereomerically pure form (X-ray structure analysis) from the reaction between rac, /rfl«s-CsH8(PCl2)2 and (2 /? ,3 /?)-(+)-d iiso p ro p y l tartrate. C l e a v a g e o f (S ,.S)-1 w i t h P C U y i e l d e d a n u n s e p a r a b l e m i x t u r e o f (1 S , 2 S W r a n s -C 5 H 8(P C l 2) 2 a n d (4 R .5 R) -C l P [ 0 C H (C 0 2P r -t) -]2. 
  Reference    Z. Naturforsch. 50b, 1004—1008 (1995); eingegangen am 30. N ovem ber 1994 
  Published    1995 
  Keywords    Chiral Bis(phosphine) Reduction of P -O, X-Ray, Mass Spectra, NM R Spectra 
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 TEI-XML for    default:Reihe_B/50/ZNB-1995-50b-1004.pdf 
 Identifier    ZNB-1995-50b-1004 
 Volume    50 
58Author    T. Sc HRequires cookie*
 Title    Departm ent o f Chemistry, The U niversity, Leicester LEI 7RH, England and  
  Reference    (Z. Naturforsch. 30b, 969 [1975]; received June 19 1975) 
  Published    1975 
  Keywords    Acetylisocyanate, Chlorosulfonylisocyanate, NMR, Mass Spectra, 3-Chlorosulfonyl-6-methyl-2 H-l, 3, 5-oxadiazine-2, 4-(3 H)-dione 
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 TEI-XML for    default:Reihe_B/30/ZNB-1975-30b-0969_n.pdf 
 Identifier    ZNB-1975-30b-0969_n 
 Volume    30 
59Author    Michael Binnewies, Joseph Grobe, Duc Le VanRequires cookie*
 Title    Reaktive E = C (p—p);r-Systeme, IV [1]: Retro-Dienspaltung von Diels-Alder-Addukten des Phosphaalkens F3CP=C F2 Reactive E = C (p-p)Tr-Systems, IV [1]: Retro Diene Cleavage of Diels-Alder Adducts of the Phosphaalkene F3CP=CF2  
  Reference    Z. Naturforsch. 40b, 927 (1985); eingegangen am 6. März 1985 
  Published    1985 
  Keywords    Retro D ien e R eactions, P hospha-H eterocycles, Mass Spectra, Therm ochem ical D ata, NM R Spectra 
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 TEI-XML for    default:Reihe_B/40/ZNB-1985-40b-0927.pdf 
 Identifier    ZNB-1985-40b-0927 
 Volume    40 
60Author    Joseph Grobe, Duc Le Van, Joachim SchulzeRequires cookie*
 Title    Diels-Alder Adducts of the Diphosphene F3CP=PCF3  
 Abstract    The heterocycles 3 to 6 are formed in a one-pot procedure by reacting trifluoromethyl phosphorus diiodide F3CPI2 with tin dichloride SnCl2 in the pre­ sence of the corresponding 1,3-dienes. The reac­ tions proceed via [2+4] cycloaddition of the diphos­ phene intermediate F3C P=PC F 3 (1) as suggested by the high yields obtained (50 to 100%) and the for­ mation of the cyclic tetraphosphane (F3CP)4 (2) as the only by-product. Cycloreversion occurs at moderate temperatures as demonstrated by the reaction of 6 with 2,3-dimethylbutadiene to give 3 and cyclohexadiene. The products have been characterized by N M R and mass spectra. 
  Reference    Z. Naturforsch. 40b, 1753—1755 (1985); eingegangen am 30. Juli 1985 
  Published    1985 
  Keywords    Perfluoromethyl Diphosphene, Preparation (in situ), [2+4] Cycloaddition, Mass Spectra, N M R Spectra 
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 TEI-XML for    default:Reihe_B/40/ZNB-1985-40b-1753_n.pdf 
 Identifier    ZNB-1985-40b-1753_n 
 Volume    40 
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