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1984 (324)
181Author    H. W. ErnerRequires cookie*
 Title    M ax-Planck-Institut für K ohlenforschung, D-4330 M ülheim a.d . Ruhr  
  Reference    Z. Naturforsch. 39b, 990—9 (1984); received February 17 1984 
  Published    1984 
  Keywords    Palladium, ^3-A llyl, ?75 -Cyclopentadienyl, ?7 2-Fulvene 
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 TEI-XML for    default:Reihe_B/39/ZNB-1984-39b-0990_n.pdf 
 Identifier    ZNB-1984-39b-0990_n 
 Volume    39 
182Author    Paul Binger, TonyR. Onald, M. Artin, Reinhard Benn, Anna Rufińska, G.Erhard SchrothRequires cookie*
 Title     
 Abstract    e t a lla c y c lo a lk a n e , V I I I [1] i/5-C y c I o p e n t a d ie n y l-i72-m e t h y le n c y c lo p r o p a n -C o b a lt k o m p le x e u n d d e r e n U m w a n d lu n g in f/4-B u t a d ie n -C o b a lt k o m p le x e ü b e r C o b a lt a c y c lo p e n t a n e M etallacycloalkanes, V III [1] ^-Cyclopentadienyl-z^-M ethylenecyclopropane Complexes of Cobalt and their Transform ation into ^-B u tad ien e Complexes via Cobaltacyclopentanes /75 -C yclopentadienyl-/72-m eth y len e cy clo p ro p an eco b alt C o m p lexes, Iso m erisation , ?74-Butadiene Cobalt C om plexes, N M R Spectra 
  Reference    Z. Naturforsch. 39b, 993—1000 (1984); eingegangen am 12. März 1984 
  Published    1984 
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 Identifier    ZNB-1984-39b-0993 
 Volume    39 
183Author    Borislav Bogdanović, M. Anfred SchwickardiRequires cookie*
 Title    Katalytische Synthese von Hydridmagnesiumchlorid aus Magnesium, Wasserstoff und Magnesiumchlorid Catalytic Synthesis of Hydridomagnesium Chloride from Magnesium, Hydrogen and Magnesium Chloride  
 Abstract    , K aiser-W ilhelm -Platz 1. D -4330 M ülheim a. d. Ruhr Herrn Prof. Dr. R oland K öster zum 60. G eburtstag gew idm et Hydrom agnesium Chloride, Catalytic H ydrogenation of M agnesium , M agnesium Hydride TH F solutions of hydridomagnesium chloride (H M gC l, la) can be prepared in nearly quantita­ tive yields by hydrogenation o f magnesium in TH F solutions o f magnesium chloride at 0 °C in the presence o f a CrCl3—Mg anthracene catalyst. Concentration o f saturated H M gCl solutions, or hydrogenation of magnesium under the above m entioned conditions in M gCl2-TH F suspensions, lead to the formation o f TH F solutions o f species having the approxim ate com position HMgCl • M gH : or 2 HMgCl ■ M gH 2. 
  Reference    Z. Naturforsch. 39b, 1001 (1984); eingegangen am 24. Februar 1984 
  Published    1984 
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 TEI-XML for    default:Reihe_B/39/ZNB-1984-39b-1001.pdf 
 Identifier    ZNB-1984-39b-1001 
 Volume    39 
184Author    WilhelmV. Olker Dahlhoff, AngelikaG. Eisheim Er, G.Erhard Schrotht, RichardM. Ynott+Requires cookie*
 Title     
 Abstract    r g a n o b o r o n -M o n o s a c c h a r id e s , X I I I [1] / S -D -M a n n o f u r a n o s id e s : H ig h ly S t e r e o s e le c t iv e S y n t h e s e s a n d N M R C h a r a c t e r iz a t io n ohlenforschung, K aiser-W ilhelm-Platz 1, D -4330 M ülheim an der Ruhr D edicated to Prof. Dr. R oland K öster on the occasion o f his 60th birthday Sodium -organooxy-triethylborates, /?-D-M annofuranosides, NM R Spectra Stoichiom etric reactions o f 2,3:5,6-di-0-ethylboranediyl-a-D -m annofuranosyl bromide (1) with O -nucleophiles at room temperature give /3-D-m annofuranosides with excellent stereoselec­ tivities. The labile glycosides obtained are deboronated in quantitative yields and then converted to their tetra-O -acetates. The products are characterized by N M R spectroscopy. 
  Reference    Z. Naturforsch. 39b, 1004 (1984); received March 7 1984 
  Published    1984 
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 Identifier    ZNB-1984-39b-1004 
 Volume    39 
185Author    Karl Fischer, Klaus Jonas, Alfred Mollbach, G. Ünther WilkeRequires cookie*
 Title     
 Abstract    b e r d ie k a t a ly t is c h e U m w a n d lu n g v o n O le f in e n , V I I I [1 ] " N a c k t e s " N i c k e l a ls K a t a ly s a t o r b e i d e r U m a lk y lie r u n g v o n A lu m in iu m t r ia lk y le n m it a -O l e f i n e n The Catalytic Conversion of Olefins, V III [1] "N aked"-Nickel as a Catalyst for the Transalkylation of Aluminium Trialkyls with a-O lefins Nickel Catalysis, N ickel-O lefin C om plexes, Alum inium Alkyls Nickel(0)-olefin com plexes such as tris(ethylene)nickel(0) (4), tris(bicycloheptene)nickel(0) (6), a//-/raA75(cyclododecatriene)nickel(0) (26), tris(stilbene)nickel(0) (27) and bis(cyclooc-tadiene)nickel(O) (23) are highly active hom ogeneous catalysts for the transalkylation o f aluminium trialkyls with a-olefins. A fter com pletion o f the reaction the nickel(O) can be rem oved in the form of N i(C O) 4 by reaction with CO . Characteristic for the catalytic reaction is the formation of olefin-nickel-vr-bonds and Ni —C —A1 multi-centre-bonds. The m echanism o f the reaction is discussed with the help of m odels. 
  Reference    Z. Naturforsch. 39b, 1011 (1984); eingegangen am 23. März 1984 
  Published    1984 
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 Identifier    ZNB-1984-39b-1011 
 Volume    39 
186Author    CarlH. Abben, A. Nton MellerRequires cookie*
 Title    l,4-Dithia-2,6-diaza-3,5-diborinane: Ein neues B —N —S-Ringsystem 1.4-Dithia-2.6-diaza-3,5-diborinanes: A Novel B — N —S-Ringsystem  
 Abstract    1.4-D ithia-2.6-diaza-3.5-diborinanes, 1,2-D ithia-4-aza-3,5-diborolidines. 1.2.4-Trithia-3,5-diborolanes, Sulfurdiim ides. A zom ethines 
  Reference    Z. Naturforsch. 39b, 1022—1026 (1984); eingegangen am 14. Februar 1984 
  Published    1984 
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 TEI-XML for    default:Reihe_B/39/ZNB-1984-39b-1022.pdf 
 Identifier    ZNB-1984-39b-1022 
 Volume    39 
187Author    Wolfgang Haubold, Johann Hrebicek, Gisela Sawitzki, Herrn Prof, R. DrRequires cookie*
 Title    Diboran(4)-Moleküle mit Boratomen unterschiedlicher Koordinationszahl D iborane(4) Molecules with Boron Atom s with Different Coordination Num ber Diborane(4) Molecules, Bifunctional Bases, Synthesis, X-Ray  
 Abstract    Molecules with directly bonded boron atoms with different coordination numbers (10, 11, 12 and 13) can be prepared from suitable bifunctional bases like 6, 7, 8 or 9 and C12B — BC12 (1) in an appropriate solvent at high dilution. Properties and spectroscopic data — including '7("B-nB) — are described. The molecular structure of 10 was investigated by means of an X-ray structure analysis. 
  Reference    Z. Naturforsch. 39b, 1027—1031 (1984); eingegangen am 22. März 1984 
  Published    1984 
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 Identifier    ZNB-1984-39b-1027 
 Volume    39 
188Author    Heinz Hoberg, Klaus SümmermannRequires cookie*
 Title    Nickel(0)-katalysierte Synthese von Iminen aus Isocyanaten und Aldehyden Nickel(O) Catalysed Synthesis of Imines from Isocyanates and Aldehydes  
 Abstract    The influence of different ligands upon the nickel(0)-catalysed formation of imines from iso­ cyanates and aldehydes is reported. Carbonyl-free nickel(O) systems are found to be more active and provide a simple synthesis of imines. The catalysis proceeds via a five-membered metalla-cycle, which has been isolated and characterized. 
  Reference    Z. Naturforsch. 39b, 1032—1036 (1984); eingegangen am 2. März 1984 
  Published    1984 
  Keywords    Nickel(O), Isocyanates, Aldehydes, Imines, Reductive Elimination Process 
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 Identifier    ZNB-1984-39b-1032 
 Volume    39 
189Author    Susanna Kerschl, Bernd WrackmeyerRequires cookie*
 Title    Organoborierung von Alkinylstannanen, XIV [1]  
 Abstract    Organoborierung von Bis(alkinyl)stannanen: Mechanismus und Anwendung der 119Sn—NMR-Spektroskopie O rganoboration of Alkynylstannanes, XIV [1] O rganoboration of Bis(alkynyl)stannanes: M echanism and Application of 119Sn NM R Spectroscopy Dimethylbis(phenylethynyl)stannane (1) reacts with trialkylboranes, BR3 (2), to give bis(al-kenyl stannanes (5) (R = C2H5), l-bora-4-stanna-2,5-cyclohexadienes (6) (R = C2H5, C3H7'), 1-stanna-2,4-cyclopentadienes (7) (R = C2H5) and l-stanna-3-cyclopentenes (8) (R = CH3, C2H5). I3C and uySn NMR data prove the structure of the reaction products (5 to 8). 119Sn NMR is useful (i) for following the course of the reaction (mechanism!) and (ii) for quantitative analysis of the product distribution. Deorganoboration reactions play an important role in the formation of the various heterocyclic systems. 
  Reference    Z. Naturforsch. 39b, 1037—1041 (1984); eingegangen am 24. Februar 1984 
  Published    1984 
  Keywords    et Alkynylstannanes, Organoboration, Mechanism, 1, ySn NMR Spectra, 13C NMR Spectra 
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 Identifier    ZNB-1984-39b-1037 
 Volume    39 
190Author    Trimethylsilylalkinen, H. Artm Ut Klusik, Christine Pues, Armin BerndtRequires cookie*
 Title    ,1-EMborierung von  
 Abstract    1.1-and l,2-Bis(rm-butylchloroboryl)alkenes l,2-Di-terr-butyl-l,2-dichlorodiborane(4) (1) and l,2-dichloro-l,2-bis(dimethylamino)-diborane(4) (2) add to 1-trimethylsilylalkines 3 a —3d to yield 1 .l-bis(rm-butylchloroboryl)-alkenes (4) and 1 ,l-bis(chlorodimethylaminoboryl)alkenes (5), respectively, while reaction of 1 with acetylene, trimethylsilylacetylene, 2-butine and 3-hexine leads to 1,2-bis(fm-butyl-chloroboryl)alkenes (7). Compounds 4, 5 and 7 are characterized by MS. 'H, ,?C and UB NMR spectroscopy. 
  Reference    Z. Naturforsch. 39b, 1042—1045 (1984); eingegangen am 2. März 1984 
  Published    1984 
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 Identifier    ZNB-1984-39b-1042 
 Volume    39 
191Author    Thomas Kuhlmann, W. Alter, SiebertRequires cookie*
 Title    Bis  
 Abstract    [(i/3-allyl)nickel(|i,i/5-2,3-dihydro-l,3-diborolyl)]nickeI-Tetradecker-Komplexe mit terminalen Allylliganden [1] Bis[(/;?-allyl)nickel(i/,/;:'-2,3-dihydro-l,3-diborolyl)]nickel T etradecker Complexes with Term inal Allyl Ligands [1] 
  Reference    Z. Naturforsch. 39b, 1046—1049 (1984); eingegangen am 10. März 1984 
  Published    1984 
  Keywords    l, 23, 4, 5-Pentaalkyl-2, 3-dihydro-I, 3-diboroles, Bis(allyl)nickel Tetradecker Complexes 
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 Identifier    ZNB-1984-39b-1046 
 Volume    39 
192Author    H. Erbert, Lehm Kuhl, *. Jürgen, G. Rundke, G.Erhard Schroth+, ReinhardB., HerrnRequires cookie*
 Title    (f/2-Alken)organyIruthenium(II)-KompIexe und Ethyleninsertion in Phenyl-Ruthenium-Bindungen (?72-A lkene)organylruthenium (II) Complexes and Ethylene Insertion into Phenyl-Ruthenium Bonds  
 Abstract    The reaction of the alkyl-bis(triphenylphosphine)ruthenium complexes 1—3 with ethylene (5 0 -1 5 0 bar) at 7 0 -1 0 0 °C proceeds by initial phosphine dissociation to give the ?7:-ethylene-alkylruthenium compounds 6 —8 . The phenyl-ruthenium complex 4 reacts, under these condi­ tions, by ethylene insertion into the Ph-Ru bond. Subsequent Ru-/3H-elimination gives the dia-stereomeric /72-styrene-hydrido-ruthenium compounds 10a and b. At low ethylene pressure (5 -8 bar), 1 -3 react mainly by orthometallation of a phosphine-phenyl group followed by rapid ethylene insertion into the resulting Ph-Ru bond and Ru-/3H-elimination to give the dia-stereomeric complexes 9a and b. 
  Reference    Z. Naturforsch. 39b, 1050—1052 (1984); eingegangen am 12. Dezember 1983 
  Published    1984 
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 Identifier    ZNB-1984-39b-1050 
 Volume    39 
193Author    M. Otoc, O. Skar, E. Polansky, D.Requires cookie*
 Title    Topological Effect on MO Energies, IX1 On Topologically Related l,4-Dibora-2,3-diazarine and l,4-Dibora-2,5-diazarine  
 Abstract    Topological-effect-on-molecular-orbitals (TEMO) theorem, ab initio Calculations, Dibora-diazarines Minimal STO-NG (N = 3, 4 and 6) basis set non-empirical HF SCF MO calculations have been performed for topologically related l,4-dibora-2,3-diazarine (S) and l,4-dibora-2,5-diazarine (T). The equilibrium geometries of these S and T isomers have been computed by symmetry-constraint geometry optimizations using the STO-3G basis set. The calculations lead to the prediction that: i) the T isomer is about 48 kJ/mole less stable than the S isomer, and ii) the jr-MO energy patterns of the S and T isomers are in complete agreement with the TEMO theorem, while the bonding a-MO eigenvalues exhibit four inversion points. 
  Reference    Z. Naturforsch. 39b, 1053—1057 (1984); received March 20 1984 
  Published    1984 
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 Identifier    ZNB-1984-39b-1053 
 Volume    39 
194Author    Requires cookie*
 Title    Beiträge zur Chemie des Bors, 148 [1]  
 Abstract    Diam idobor(l+)-Kationen aus Bis(amino)borhalogeniden durch Halogenid-Abspaltung C ontributions to the Chemistry of Boron, 148 [1] D iam idobor(l +) Cations from Bis(amino)borhalogenides by Halide Abstraction H einrich N öth*, B ernhard R asthofer3 und Siegfried W eberb Herrn Prof. D r. R olan d K öster zu m 60. G eburtstag gew idm et Diethylamido-tetramethylpiperidino-boron(l +)-tetrahalometalate, Bis(tetramethylpiperidino)boron(l +)-tetrahalometalate, "B NMR Spectra 
  Reference    Z. Naturforsch. 39b, 1058—1068 (1984); eingegangen am 27. März 1984 
  Published    1984 
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 Identifier    ZNB-1984-39b-1058 
 Volume    39 
195Author    Peter Paetzold3, Christoph Von Plotho3, G. Ünter, Schmidb, R. Oland BoesebRequires cookie*
 Title    l,3>5-Tri"ter/-butyl-2,4,6-triisopropyl-3,5-diaza-l-azonia-2,6-dibora- 4-borata[2  
 Abstract    2.0]bicyclohexan, der erste Vertreter der Dewarborazine l,3,5-Tri-terf-butyl-2,4,6-triisopropyl-3,5-diaza-l-azonia-2,6-dibora-4-borata[2.2.0]bicyclohexane, the First D ew ar Borazine The iminoborane /Pr—B = N —rBu (la), metastable at —78 °C, trimerizes to form (/PrBNrBu) 3 (4a) at elevated temperatures. The determination of the molecular and crystal structure reveals 4a to be a Dewar-borazine-type molecule with two short peripheral BN-double-bonds (136 and 138 pm) and an extra-long bridge BN-single-bond (175 pm). The same trimer 4a is formed by addition of la to the diazadiboretidine-type dimer (/PrBNrBu)2, prepared independently. The ethyloboration and the azidoboration of la with BEt3 and Me3SiN3, respectively, and the cyclo-addition of PhN3 to la follow expected patterns. 
  Reference    Z. Naturforsch. 39b, 1069—1075 (1984); eingegangen am 29. Februar 1984 
  Published    1984 
  Keywords    Iminoborane, Diazadiboretidine, Borazine, Dewar Borazine 
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 Identifier    ZNB-1984-39b-1069 
 Volume    39 
196Author    KlausR. Pörschke, RichardM. Ynott, Carl Krüger, M. J. Rom, Herrn ProfRequires cookie*
 Title    Tris(phosphan)-Nickel(0)-Ethen  
 Abstract    Komplexe (dmpe)(PR3)Ni(C2H4). Molekülstruktur des (dmpe)(P0 3)Ni(C2H4) Tris(phosphane)-nickel(0)-ethene Complexes (dm pe)(PR 3)Ni(C2FI4). M olecular Structure of (d m p e)(P 0 3)Ni(C2F[4) Synthesis and properties of tris(phosphane)(ethene)nickel(0) complexes (dmpe)(PR3)Ni(C2H 4) (R = CH3 (4), c-C6H u (5), and C6H5 (6)) are reported. In solution. 4—6 are thermolabile and undergo ligand exchange reactions affording tetrakis(phosphane)nickel(0) and bis(phosphane)-(ethene)nickel(O) complexes. 1H , 13C, and 31P NMR data of 4 —6 confirm the tetrahedral geo­ metry around nickel. For 6 , the crystal and molecular structure has been determined by X-ray crystallography. 
  Reference    Z. Naturforsch. 39b, 1076—1081 (1984); eingegangen am 1. März 1984 
  Published    1984 
  Keywords    Ethene, Nickel(O), Phosphanes, NMR Characterization, X-Ray 
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 Identifier    ZNB-1984-39b-1076 
 Volume    39 
197Author    Azaborolinyl, G. Ünter Schmid, O. Ttm Ar Boltsch, D. Ieter Bläser, Roland BoeseRequires cookie*
 Title    Azaborolinyl-Komplexe, XV [1] Bis(f/5-l,2-azaborolinyI)ruthenium-Sandwichkomplexe — Darstellung und Strukturuntersuchung  
 Abstract    The synthesis of bis(l-rer?-butyl-2 -methyl-?75-l , 2 -azaborolinyl)ruthenium (1) and bis(2-methyl-l-trimethylsilyl-^5-l , 2 -azaborolinyl)ruthenium (2) succeeds when RuCL is reacted with the cor­ responding 1,2-azaborolinyl lithium compounds in THF at —70 °C. Each of the sandwich complex forms two isomers with a clockwise and an anti-clockwise conformation of the azaborolinyl rings. The anti-clockwise isomer of 1 (la) gives colourless crystals which were investigated by single­ crystal X-ray diffraction methods. The molecular structure shows the rings in an eclipsed orienta­ tion forming an interplanar angle of 8 .6 °. The isomers of 1 as well as of 2 give different 'H and "B NMR signals. 
  Reference    Z. Naturforsch. 39b, 1082 (1984); eingegangen am 4. Februar 1984 
  Published    1984 
  Keywords    Com plexes, XV [1] Bis(/;:'-l, 2-azaborolinyl)ruthenium Sandwich Complexes — Synthesis and Structure Investigation Azaborolinyl Sandwich Complex, Ruthenium, X-Ray, UB NMR Spectra, 'H NMR Spectra 
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 Identifier    ZNB-1984-39b-1082 
 Volume    39 
198Author    Wolfgang Hönle, ClausW. Ibbelmann, Wolfgang BrocknerRequires cookie*
 Title    Kristall-und Molekülstruktur von As2P2S7 Crystal and M olecular Structure of AS2P2S7  
 Abstract    Crystal Structure, M olecular Structure, Polycyclic Sulfide The crystal and molecular structures of As2P2S7 has been determ ined by single crystal X-ray diffraction (space group V2x/c; Z = 4; a = 1174.6(16) pm; b = 823.9(7) pm; c = 1140.1(10) pm; ß — 94.43(9)°; R = 0.073. The molecule is isosteric to P4S7 and possesses C2v symmetry. Mean bond lengths are: d (A s -A s) = 250.9 pm; d (A s -S) = 225.7 pm ; d(P — S) = 208.3 pm and d(P = S) = 193.2 pm. The observed A s -A s bond length agrees well with spectroscopic results. 
  Reference    Z. Naturforsch. 39b, 1088—1091 (1984); eingegangen am 28. F ebruar 1984 
  Published    1984 
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 Identifier    ZNB-1984-39b-1088 
 Volume    39 
199Author    A.R R CiRequires cookie*
 Title    CI  
 Abstract    oesky—H. H ofm ann • R eaktionen von D ithiooxam id mit Chlorm ethylsilanen 1093 Die Röntgenstrukturanalyse [3] von 5 zeigt ein völlig planares M olekül, in dem nur die sechs M e­ thylgruppen aus der Ebene herausragen. Die hohe Stabilität von 4 und 5 kann im wesentlichen durch n-Wechselwirkung des Siliciumatoms erklärt werden. Vergleichbare cyclische Dithion-Systeme [7, 8] zer­ fallen unter Schwefelabscheidung. Die Dithioqua-dratsäure und deren Derivate [9] sind dagegen wie­ der stabil. Die Präparation von 4 und 5 über eine zweistufige Reaktion und eine fraktionierte Kristalli­ sation ist unbefriedigend. Eine A lternative bietet sich mit dem Drei-Kom ponenten-System , bestehend aus 1, Bis(trimethylsilyl)amin und Dimethyldichlor-silan, an. Verwendet man 1 Mol von 1, 2 Mole Di-methyldichlorsilan und Bis(trimethylsilyl)amin als R eaktand und Lösungsmittel, so erhält man sowohl 4 als auch 6, die sich leicht voneinander trennen lassen. 
  Reference    Z. Naturforsch. 39b, 1092 (1984) 
  Published    1984 
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 Identifier    ZNB-1984-39b-1092 
 Volume    39 
200Author    Fritz Seel, N. Orbert KleinRequires cookie*
 Title    N-Methylcarbamoylphosphate, II. Thermische Zersetzung N-Methylcarbamoyl Phosphates, II. Therm al Decomposition  
 Abstract    N-Methylcarbamoyl Phosphates, Decom position The therm al decomposition of various salts of mono-N-methylcarbam oyl and bis-N-methyl-carbamoyl phosphoric acid in aprotic and protic solvents (acetonitrile, trichlorom ethane, alcohols) and in the solid state has been studied in detail. Final products are m ono-, di-, poly-, and cyclophosphates, in addition phosphoric acid esters if alcohols are used as solvents; and either sym. dim ethylurea or methyl isocyanate and methylam ine. The spontaneous decom position of sparingly soluble N-methyl carbam oyl phosphates in aque­ ous suspensions to yield slightly soluble diphosphates dem onstrates clearly that the reaction of calcium hydrogen phosphate with alkali cyanates via calcium carbam oylphosphate to give calcium diphosphate — which has been considered a prebiotic key reaction — is not a result of a special feature of the structure of the interm ediate product. 
  Reference    Z. Naturforsch. 39b, 1095—1099 (1984); eingegangen am 20. F ebruar 1984 
  Published    1984 
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 Identifier    ZNB-1984-39b-1095 
 Volume    39 
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