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1980 (345)
201Author    Albrecht MewisRequires cookie*
 Title    Zur Struktur der Verbindungen SrZn2As2, SrCd2As2 und YbMnCuP2 AB2X2 Compounds with the CaAl2Si2 Structure, VII [1] The Crystal Structure of SrZn2As2, SrCd2As2, and YbMnCuP2  
 Abstract    The compounds SrZn2As2, SrCd2As2, and YbMnCuP2 have been prepared and their structures determined. They are isotypic and crystallize trigonally in a CaAl2Si2-type structure (space group P3ml) with the lattice constants: 
  Reference    Z. Naturforsch. 35b, 939—941 (1980); eingegangen am 24. März 1980 
  Published    1980 
  Keywords    Ternary Compounds, Arsenides, Phosphide, Crystal Structure 
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 TEI-XML for    default:Reihe_B/35/ZNB-1980-35b-0939.pdf 
 Identifier    ZNB-1980-35b-0939 
 Volume    35 
202Author    Albrecht MewisRequires cookie*
 Title    Darstellung und Struktur der Verbindung CaCu4P2 Preparation and Crystal Structure of CaCu4P2  
 Abstract    of the system Ca-Cu-P resulted in the discovery of CaCu4P2. The compound crystallizes in a trigonal-rhombohedral structure (hexagonal axes: a = 403.6(1) pm, c = 2227.2(2) pm; space group R3m) which contains structural elements of the compound CU3P. 
  Reference    Z. Naturforsch. 35b, 942—945 (1980); eingegangen am 27. März 1980 
  Published    1980 
  Keywords    Ternary Calcium Compound, Copper, Phosphide, Crystal Structure Investigations 
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 TEI-XML for    default:Reihe_B/35/ZNB-1980-35b-0942.pdf 
 Identifier    ZNB-1980-35b-0942 
 Volume    35 
203Author    Siegmar Gäb, Johannes Schmitzer, WalterV. Turner, Friedhelm KorteRequires cookie*
 Title    Mineralization of CC14 and CC12F2 on Solid Surfaces  
 Abstract    The mineralization of 14 CCl4 and 14 CC12F2 in the dark is shown to be greatly dependent on the nature of the solid surfaces to which they are exposed, alumina being more effective than silica gel and a number of natural sands. Activation of the solids by drying or mechanically by tumbling leads to increased mineralization rates. 
  Reference    Z. Naturforsch. 35b, 946—952 (1980); received April 23 1980 
  Published    1980 
  Keywords    Radioactive Halocarbons, Solid Surfaces, Dark Degradation, Mechanical Activation 
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 TEI-XML for    default:Reihe_B/35/ZNB-1980-35b-0946.pdf 
 Identifier    ZNB-1980-35b-0946 
 Volume    35 
204Author    Hans-Jörg DeiserothRequires cookie*
 Title    Rb6In2S6 und Rb4In2S5, zwei neue Thioindate mit isolierten und verknüpften [In2S6] fi ~ Anionen Rbßl^Se and Rb4ln2Ss, Two NEW Thioindates with Isolated and Connected [I^Se] 6-Anions Respectively  
 Abstract    The hitherto unknown title compounds were prepared by a disproportionation reaction starting from elementary rubidium and indium monosulfide. Rb4ln2Ss crystallizes in the triclinic system (P 1) with the lattice constants a = 931.7(2); d> = 1097.6(3);c = 761.2(2)pm; a = 111.32°(2); ß = 94.70°(2); y = 103.70°(2) (Z = 2) and Rb6In2S6 in the monoclinic system (C2/m) with the lattice constants a = 895.3(2); b = 1356.9(2); c = 791.8(2) pm; ß = 101.53°(2) (Z = 2). The quasi molecular [I^Se] 6-group which is isoelectronic with the gas phase molecule I^Clg consists of two edge sharing InS4 tetrahedra and is the basic unit of Rb4ln2Sö as well as of RbgL^Se. The formation process, structural relationships between the two compounds and their possible role in the phase diagram of the components Rb2S and L12S3 are discussed. 
  Reference    Z. Naturforsch. 35b, 953—958 (1980); eingegangen am 18. März 1980 
  Published    1980 
  Keywords    Crystal Structures, Indium Compounds, Rubidium Compounds, Ternary Sulfides, Thioindates 
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 TEI-XML for    default:Reihe_B/35/ZNB-1980-35b-0953.pdf 
 Identifier    ZNB-1980-35b-0953 
 Volume    35 
205Author    Werner Zeiß, Wolfgang Schwarz, Heinz HessRequires cookie*
 Title    995  
 Abstract    W. Zeiß et al. • (MePNMe)4S3, ein Cyclotetra(A 3 ,A 5 ,A 5 ,A 5 -phosphazan) (MePNMe)4S3, a Cyclotetra(A 3 ,A 5 ,A 5 ,A 5 -phosphazane) 31 P} Decoupling Octamethylcyclotetra(A 3 -phosphazane) (1) reacts with three mole equivalents of sulfur, added either in excess or in deficite, to give 2, the first cyclotetra(A 3 ,A 5 ,A 5 ,A 5 -phosphazane). Its crystal structure determination shows a completely unsymmetrical molecule, which does not undergo ring inversion in solution. Thus an ABMX spin system with remarkably different AM and BM coupling constants is observed in the 31 P{ 1 H} NMR spectrum. By means of selective { 31 P} decoupling, all CH3 proton signals could be assigned in the 1 H NMR spectrum. 
  Reference    Z. Naturforsch. 35b, 959—963 (1980); eingegangen am 29. Februar 1980 
  Published    1980 
  Keywords    Cyclotetraphosphazane, Crystal Structure, NMR Spectra, Selective { 
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 TEI-XML for    default:Reihe_B/35/ZNB-1980-35b-0959.pdf 
 Identifier    ZNB-1980-35b-0959 
 Volume    35 
206Author    Dirk Dahmann, Hans Rose, Wolfgang WalzRequires cookie*
 Title    Darstellung und Struktur von Phosphazenylcyclophosphazenen Synthesis and Structure of Phosphazenylcyclophosphazenes  
 Abstract    Various phosphazenylcyclophosphazenes N3P3Xn(N = PA3)e-n with X = Cl, F, A = Me, Ph, NMe2, OEt, OPr», OBut" and n = 1-3 were obtained by desilylation methods. Chemical and spectroscopical properties dependent on the substituents are discussed. Isomers of di-and tri-substituted compounds were isolated and their structures elucidated by NMR spectroscopy. 
  Reference    Z. Naturforsch. 35b, 964—969 (1980); eingegangen am 14. Dezember 1979 
  Published    1980 
  Keywords    Phosphazenylcyclophosphazenes, Molecular Structure, Synthesis 
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 TEI-XML for    default:Reihe_B/35/ZNB-1980-35b-0964.pdf 
 Identifier    ZNB-1980-35b-0964 
 Volume    35 
207Author    HansJoachim Berthold, Wolfgang LudwigRequires cookie*
 Title    Thermische Zersetzung nichtstöchiometrischer Cäsium-Silber-Gold(III)-Chloride und Darstellung von Mischkristallen zwischen Cs2AgAuCl6 und Cs2Au T Au rri Cl6 Thermal Decomposition of Nonstoichiometric Cesium-Silver-Gold(III)-Chloride and Preparation of Mixed Crystals of Cs2AgAuCl6 and Cs2Au I Au III Cl6  
 Abstract    The thermal decomposition of cesium-silver-gold(III)-chloride Cs2Agi_2Aui+2:/3CI6 with 0 <x < 0.63 at temperatures between 250 and 350 °C yields, under evolution of chlorine, mixed crystals of Cs2AgAuCl6 and Cs2Au I Au III Cl6. The composition of the latter can be described by the formula Cs2Agi_j,Au1/ I Au III Cl6 with y = 2a;/ (3—x). Apart from the formation of the mixed crystals the reaction leads to CsCl as a further phase, and in the case of x < 0.35 also to some Cs2AgAuCl6. Mixed crystals with 0.23 < y < 1, free from additional solid phases, can be obtained from strong hydrochloric acid solutions of Cs2AgAuCl6 and Cs2Au I Au III Cl6, which contain an excess of cesium ions. The mixed crystals are isostructural with Cs2Au I Au III Cl6 (space group I4/mmm). The variation of the lattice constants with increasing silver content confirms that the univalent silver, in contrast to the univalent gold, shows no tendency toward the formation of linear dichloro complexes. Our investigations show that the "tetragonal modification of Cs2AgAuCle", described by Elliott and Pauling and obtained by them by heat treatment of cubic cesium-silver -gold(III)-chloride, is, in fact, C , S2Agi_2/Au2/ I Au III Cl6. 
  Reference    Z. Naturforsch. 35b, 970—975 (1980); eingegangen am 17. April 1980 
  Published    1980 
  Keywords    Cesium-Silver-Gold(III)-Chloride, Thermal Decomposition, Preparation, Lattice Constants 
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 TEI-XML for    default:Reihe_B/35/ZNB-1980-35b-0970.pdf 
 Identifier    ZNB-1980-35b-0970 
 Volume    35 
208Author    Abdel-Fattah Shihada, Rehab MajedRequires cookie*
 Title    Darstellung und spektroskopische Untersuchungen von Me3SiOP(S)Cl2, Me3SiOP(S)Br2 sowie Me3Si0P(0)Br2 Preparation and Spectroscopic Properties of Me3SiOP(S)Cl2, Me3SiOP(S)Br2 and Me3Si0P(0)Br2  
 Abstract    Trimethylsilyl dichlorothiophosphate (Me3SiOP(S)Cl2) and trimethylsilyl dibromothio-phosphate (Me3SiOP(S)Br2) are prepared by reactions of (Me3Si)2S with P0C13 and POBr3, respectively. The reaction of POBr3 with Me3SiOCOCH3 in the mol ratio 1:1 gives Me3Si0P(0)Br2, a molar ratio of 1:3 leads to (Me3SiO)3PO. The vibrational spectra have been used to elucidate the structures of the compounds. It was found that -0P(S)C12 as well as -OP(S)Br2 are linked to the trimethylsilyl group through the oxygen atom. 
  Reference    Z. Naturforsch. 35b, 976—980 (1980); eingegangen am 7. März 1980 
  Published    1980 
  Keywords    Preparation, Properties, Vibrational Spectra, 31 P NMR Spectra 
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 TEI-XML for    default:Reihe_B/35/ZNB-1980-35b-0976.pdf 
 Identifier    ZNB-1980-35b-0976 
 Volume    35 
209Author    DavidW. AllenRequires cookie*
 Title    Reactions of Ferrocenyldiphenylphosphine. Effects of the Ferrocenyl Group at Phosphorus on the Course of Decomposition of Phosphonium Betaines and Vinylphosphonium Salts  
 Abstract    The reaction of ferrocenyldiphenylphosphine with styrene oxide in ethanol gives, as the major product, ferrocenyl(phenyl)(l,2-diphenylethyl)phosphine oxide (5, R = Ph), the result of a rearrangement involving phenyl migration from phosphorus to adjacent carbon in the decomposition of a vinylphosphonium ion arising from protonation and subsequent elimination of water from the initially-formed phosphonium betaine. A related phenyl migration occurs in the reaction of the phosphine with ethyl propiolate in wet THF. The presence of a ferrocenyl group at phosphorus in Wittig reactions of semistabilised ylides causes the expected decrease in the cis-trans ratio of the resulting alkenes, consistent with its behaviour as an electron-donating substituent. 
  Reference    Z. Naturforsch. 35b, 981—984 (1980); received February 18 1980 
  Published    1980 
  Keywords    Phosphonium Salt Hydrolysis, Aryl Migration, Wittig Reaction 
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 TEI-XML for    default:Reihe_B/35/ZNB-1980-35b-0981.pdf 
 Identifier    ZNB-1980-35b-0981 
 Volume    35 
210Author    Klaus Schloter, Wolfgang BeckRequires cookie*
 Title    Starke metallorganische Lewis-Säuren, III [1]  
 Abstract    Reaktionen von Tricarbonyl-^-cyclopentadienylmolybdäntetrafluoroborat mit cyclischen Ethern (CH2)nO (n = 2,3,4) und Dioxan Strong Organometallic Lewis Acids, III [1] Reactions of Tricarbonyl-r/ 5 -cyclopentadienyl Molybdenum Tetrafluoroborate with Cyclic Ethers (CH2)nO (n = 2, 3, 4) and Dioxane Tetrafluoroborate in (^-CsHsKOC^MoFBFa is easily substituted by cyclic ethers (CH2)NO (n = 2,3,4)at -30°C inCH2Cl2togive cationic complexes[(J? 5 -C5H5)(OC)3MOO(CH2)"]+BF4-. With dioxane mononuclear and dinuclear dioxane bridged cationic complexes have been obtained. Ring opening of oxirane in [(^ 5 -C5H5)(OC)3MoO(CH2)2] + occurs at low tem-peratures; in the presence of oxirane or acetone formation of dioxane or 2,2-dimethyl-1,3-dioxolane, respectively, has been observed. The dioxolane has been obtained also in high yield by direct cyclisation of oxirane and acetone using [(^ 5 -CöH5)(OC)3Mo(acetone)] + as catalyst. 
  Reference    Z. Naturforsch. 35b, 985—989 (1980); eingegangen am 8. April 1980 
  Published    1980 
  Keywords    Organometallic Lewis Acids, Tricarbonyl Cyclopentadienyl Molybdenum Tetrafluoroborate, Ether Complexes, Ring Opening of Oxirane 
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 TEI-XML for    default:Reihe_B/35/ZNB-1980-35b-0985.pdf 
 Identifier    ZNB-1980-35b-0985 
 Volume    35 
211Author    H. Schmidbaur, A. MörtlRequires cookie*
 Title    Ein spiro-bicyclisehes Phosphor-ylid und sein korrespondierendes Phosphoniumkation A Spiro-bicyclic Phosphorus Yhde and its Corresponding Phosphonium Cation  
  Reference    Z. Naturforsch. 35b, 990—993 (1980); eingegangen am 19. Mai 1980 
  Published    1980 
  Keywords    Ylides, Phosphorus Ylides, Phosphonium Salts, Spiro-bicyclic Compounds 
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 TEI-XML for    default:Reihe_B/35/ZNB-1980-35b-0990.pdf 
 Identifier    ZNB-1980-35b-0990 
 Volume    35 
212Author    G. Peters, W. PreetzRequires cookie*
 Title    Geometrische Isomerie bei bindungsisomeren Hexakis(thiocyanatoisothiocyanato)osmaten(III) Geometrie Isomerism of Bond Isomerie Hexakis(thiocyanatoisothiocyanato)osmates (III)  
 Abstract    Geometrie Isomers, Bond Isomerie Hexakis(thiocyanato-isothiocyanato)osmates(III), Raman Spectra, IR Spectra From the system of isomeric complex ions [Os(NCS)n(SCN)6-n] 3 ~> 9 of 10 possible species, n = 1-6, are isolated, including for n = 2, 3, 4 the first representatives of pure geometric bond isomers. By reaction of K2[OsCl6] with aqueous KSCN solution at reflux temperature, <ran«(mer)-complexes, and on treatment at 60 °C exclusively cis(fac)-complexes are formed. By ion exchange chromatography on diethylaminoethyl-cellulose columns, from mixtures of pairs of geometric isomers the pure £rans(mer)-compounds are enriched in front, the cis(fac)-species at the end of the zones. Characterization and assignment of the configuration of the geometric isomers is based upon the reproducible differences in the IR and Raman spectra. 
  Reference    Z. Naturforsch. 35b, 994—999 (1980); eingegangen am 5. Mai 1980 
  Published    1980 
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 TEI-XML for    default:Reihe_B/35/ZNB-1980-35b-0994.pdf 
 Identifier    ZNB-1980-35b-0994 
 Volume    35 
213Author    Adonis Georgiades, H. P. LatschaRequires cookie*
 Title    Reaktion von Triphenylbismutan mit aliphatischen Dicarbonsäuren Reactions of Triphenylbismuthan with Aliphatic Dicarbonic Acids  
 Abstract    By the reaction of Bi(C6Hs)3 with oxalic, malonic, succinic and maleic acids, five-, six-and seven-membered heterocycles with Bi-and O-atoms are formed. During the reaction two phenyl groups are cleaved off. 
  Reference    Z. Naturforsch. 35b, 1000—1001 (1980); eingegangen am 18. Dezember 1979/8. April 1980 
  Published    1980 
  Keywords    Heterocycles, Triphenylbismuthan, Aliphatic Dicarbonic Acids 
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 TEI-XML for    default:Reihe_B/35/ZNB-1980-35b-1000.pdf 
 Identifier    ZNB-1980-35b-1000 
 Volume    35 
214Author    Willy FriedrichsenRequires cookie*
 Title    Entwicklung der Systeme und Untersuchungen am 1-Oxo-lH-pyrazolo [1.2-a] pyrazol-4-ium-3-olat-Typ Mesoionic 4n7r-Heterocycles, I Mesoionic 4 n Five-Membered Heterocycles and 8 jr-Heteropentalenes. Development of the Systems and Investigations on the 1-Oxo-lH-pyrazolo[l,2-a]pyrazol-4-ium-3-olate Type  
 Abstract    Mesoionic 8 rc-Heteropentalenes, Synthesis, Reactions 4n7i-Mesoionic heterocycles are -with one exception -a hitherto unknown class of compounds. In this paper the possible 4 jr-five-membered mesoionic heterocycles, their ring anellated derivatives and the corresponding heteropentalenes are derived. Reactions of the l-oxo-lH-pyrazolo[l,2-a]pyrazol-4-ium-3-olate system with tetrachloro-o-benzo-quinone are described. la lb 2a A. Entwicklung der Systeme \ / \ / 
  Reference    Z. Naturforsch. 35b, 1002—1008 (1980); eingegangen am 24. Februar 1980 
  Published    1980 
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 TEI-XML for    default:Reihe_B/35/ZNB-1980-35b-1002.pdf 
 Identifier    ZNB-1980-35b-1002 
 Volume    35 
215Author    Omer SayginRequires cookie*
 Title    Nonenzymatie Formation of Energy Rich Phosphates in the Course of Imidazole Oxidation with Fenton's Reagent  
 Abstract    Oxidation of substituted imidazoles with modified Fenton's reagent (Fe(II), ascorbic acid, EDTA and H2O2) in aqueous solution at pH 5-7 in the presence of inorganic ortho-phosphate gives high yields of an unknown bound phosphate, in the case of 2-methyl-imidazole up to 35% based on inorganic phosphate. The dependence of the yields on reaction parameters and the hydrolytic behaviour of the compound was studied. The products are unstable in alkaline medium and fairly stable in acid solution (half-life period ca. 1 h at 25 °C in IN perchloric acid). Similar bound phosphate was also observed using autoxidation with O2 instead of H2O2. 
  Reference    Z. Naturforsch. 35b, 1009—1014 (1980); received February 29 1980 
  Published    1980 
  Keywords    Bioids, Oxidative Phosphorylation, Photophosphorylation, Fenton's Reaction, Imidazole Oxidation 
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 TEI-XML for    default:Reihe_B/35/ZNB-1980-35b-1009.pdf 
 Identifier    ZNB-1980-35b-1009 
 Volume    35 
216Author    Werner Winter, Hanspeter Bühl, Herbert MeierRequires cookie*
 Title    Structure Determination of 3,5-Biscyclohexylidene-l,2,4-trithiolane  
  Reference    Z. Naturforsch. 35b, 1015—1018 (1980); eingegangen am 14. März 1980 
  Published    1980 
  Keywords    Fragmentation of 1, 2, 3-Thiadiazoles, 1, 2, 4-Trithiolanes, X-ray 
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 TEI-XML for    default:Reihe_B/35/ZNB-1980-35b-1015.pdf 
 Identifier    ZNB-1980-35b-1015 
 Volume    35 
217Author    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 
218Author    Grzegorz Grynkiewicz, Aleksander ZamojskiRequires cookie*
 Title    Electrophilic Substitution of Aromatic Compounds by Unsaturated Sugar Derivatives  
 Abstract    Hexenopyranosyl Carbocations, Pent-2-enopyranos-4-ulosyl Carbocations Glycals 1 and 2 react with methoxybenzene in the presence of SnCLj forming ^-substi-tuted C-glycosyl compounds 4 and 5 + 6 respectively. Under similar conditions l-O-benzoyl-or methyl pent-2-enopyranos-4-uloses (7) and (8) react with electron rich aromatic compounds furnishing either C-glycosyl compounds or C-2 aryl substituted products depending on the nature of the aromatic component as well as the kind of substituent at C-l. 
  Reference    Z. Naturforsch. 35b, 1024—1027 (1980); received March 20 1980 
  Published    1980 
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 Identifier    ZNB-1980-35b-1024 
 Volume    35 
219Author    MichaelC. Böhm, Rolf GleiterRequires cookie*
 Title    The Electronic Structure and the He(I) Photoelectron Spectrum of Tricarbonylcyclooctatetraene-iron [1]  
 Abstract    The highest occupied molecular orbitals of tricarbonylcyclooctatetraene-iron (1) have been derived from those of tricarbonyl-butadiene-iron and butadiene. Based on this MO diagram and an INDO-type calculation the He(I) photoelectron (PE) spectrum of 1 could be interpreted. Using the A SCF and the transition operator method (TOM) the first five bands of the PE spectrum of 1 could be assigned. 
  Reference    Z. Naturforsch. 35b, 1028—1030 (1980); received February 22 1980 
  Published    1980 
  Keywords    INDO Calculations, Cationic States, PE Spectra 
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 TEI-XML for    default:Reihe_B/35/ZNB-1980-35b-1028.pdf 
 Identifier    ZNB-1980-35b-1028 
 Volume    35 
220Author    Gernot Frenking, Jochen Schmidt, Helmut SchwarzRequires cookie*
 Title    MNDO-Rechnungen zur unimolekularen CO-Abspaltung aus Isomeren C3H5CO + -Ionen MNDO Calculations on the Unimolecular CO Loss from Isomerie C3HsC0 + Ions  
 Abstract    In agreement with experimental results MNDO calculations indicate that unimolecular CO loss from the isomeric ions CH2 = CHCH2-CO+ (1), C-C3H5-CO+ (2), and CHsCH = CH-CO + (3), gives exclusively allyl cation (4). It is shown that, whereas CO loss from 1 is a continuously endothermic process, the analogous reaction from 2 and 3 follows relatively complicated pathways. For 2, the energetically most feasible reaction involves an isomerization of 2 to 1 via the intermediate a-oxo-and /?-oxocyclobutyl cations (8) and (9). This reaction sequence is 10 kcal • mol -1 lower in energy than direct CO loss from 2 coupled with isomerization of the incipient cyclopropyl cation (7) to allyl cation (4). For 3 it is shown that this ion undergoes isomerization to 2 prior to CO loss. The alternative reaction, i.e. direct CO elimination giving rise to 1-propenyl cation (11) or isomerization to 1 were 35 and 43 kcal • mol -1 higher in energy than the process 3 -* • 2. 
  Reference    Z. Naturforsch. 35b, 1031—1034 (1980); eingegangen am 21. März 1980 
  Published    1980 
  Keywords    Carbocation Chemistry, Quantum Mechanical Calculations, Potential Energy Surfaces 
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 TEI-XML for    default:Reihe_B/35/ZNB-1980-35b-1031.pdf 
 Identifier    ZNB-1980-35b-1031 
 Volume    35 
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