@article{ChristlSchreck1987, author = {Christl, Manfred and Schreck, M.}, title = {7-Arylbicyclo[4.2.0]oct-1-ene - Synthese durch [2+2]-Cycloadditionen von 1,2-Cyclohexadien sowie 1-Methyl-1,2-cyclohexadien und thermische {\"A}quilibrierung der exo/endo-Isomeren}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-58352}, year = {1987}, abstract = {Das exo/endo--lsomerenverh{\"a}ltnis Ja: Jb bei der bekannten [2 + 2]-Cycloaddition von Styrol an 1,2-Cyclohexadien (2) wurde als tempcraturabhingiaaefunden. Der Einsatz von (Z)-Dcutcriostyrollicfene den Beweis der Zweistufiakeit dieser Reaktion, und das Diradikal 4 wird als wahrscheinlichste Zwischenstufe anaesehen. Erhitzen von Jb auf 140-170°C f{\"u}hrte zur Binstellung des thermodynamischen Gleichgewichts mit Ja (Ja:3b = 93:7), wobei wieder das Diradikal4 als Zwischenstufe fungieren d{\"u}rfte. Mit Hilfe kinetischer Messungen ermittelte man die Aktivierungsparameter f{\"u}r das System Ja~ 3b. - Aus 2 und den Abfangreagenzien p-Methoxystyrol, 1,1-Diphenylethylen sowie 1-Phenylpropen gingen mit bescheidenen Ausbeuten die Titelverbindungen 6a, b, 7 bzw. 8 hervor. Analoa zu 2 wurde sein l-Methylderivat 13 aus 6,6-Dibrom-1-methylbicyclo[3.1.0]hexan (9) durch Methyllithium freigesetzt. In Gegenwart von Styrol entstand neben den Abfanaprodukten 14a, b auch das Dimere 12 von lJ. - Die 1H-NMR-Spektren der Titelverbindungen belegen eine starre Halbsesselkonformation des Cyclohexentcils mit {\"a}quatorial anellienem Cyclobutanring.}, subject = {Organische Chemie}, language = {de} } @article{ChristlLeininger1979, author = {Christl, Manfred and Leininger, Hartmut}, title = {7-Azatetracyclo[4.1.0.02,4.03,5]heptan - ein neues Valenzisomeres des Azepins}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-30034}, year = {1979}, abstract = {No abstract available}, language = {de} } @article{ChristlBrunnRothetal.1989, author = {Christl, Manfred and Brunn, E. and Roth, W. R. and Lennartz, H.-W.}, title = {7-Methyl- and 7-Phenylcyclohepta-1,3,5-trienes from Benzvalene Via 3,3a,4,5,6,6a-Hexahydro-4,5,6-methenocyclopentapyrazoles and Tetracyclo[4.1.0.0\(^{2,4}\).0\(^{3,5}\)]heptanes}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-58471}, year = {1989}, abstract = {No abstract available}, subject = {Organische Chemie}, language = {en} } @article{ChristlBuchner1978, author = {Christl, Manfred and Buchner, Wolfgang}, title = {13C-NMR-Spektren von Tetracyclo[4.1.0.02,4.03,5]heptanen, Tetracyclo[5.1.0.02,4.03,5]octanen und Tricyclo[4.1.0.02,7]hept-3-enen. Ungew{\"o}hnliche beta- und gamma-Substituenteneffekte}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-30087}, year = {1978}, abstract = {No abstract available}, language = {de} } @article{Christl1975, author = {Christl, Manfred}, title = {\(^{13}\)-NMR-Spektren von Bicyclo[n.1.0]kohlenwasserstoffen}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-57977}, year = {1975}, abstract = {No abstract available}, subject = {Organische Chemie}, language = {de} } @article{ChristlWarrenHawkinsetal.1973, author = {Christl, Manfred and Warren, J. D. and Hawkins, B. L. and Roberts, J. D.}, title = {\(^{13}\)C and \(^{15}\)N Nuclear Magnetic Resonance Spectroscopy of Nitrile Oxides and Related Reaction Products : Unexpected \(^{13}\)C and \(^{15}\)N Nuclear Magnetic Resonance Parameters of 2,4,6-Trimethylbenzonitrile Oxide}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-57894}, year = {1973}, abstract = {No abstract available}, subject = {Organische Chemie}, language = {en} } @article{ChristlHerzog1986, author = {Christl, Manfred and Herzog, C.}, title = {\(^{13}\)C-NMR-Spektroskopie: Besondere Hochfeldeffekte in Bicyclo[4.1.1]- und Tricyclo[5.1.0.0\(^{2,8}\)]octan-Systemen (1,3-Cycloheptadien-Effekt) und besondere Tieffeldeffekte in Dihalogenbicyclo[2.1.1]hex-2-enen (Cyclopenten-Effekt)}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-58334}, year = {1986}, abstract = {No abstract available}, subject = {Organische Chemie}, language = {de} } @article{BastChristlHuisgenetal.1972, author = {Bast, K. and Christl, Manfred and Huisgen, R. and Mack, W.}, title = {Additionen der Nitriloxide an CN-Mehrfachbindungen}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-57879}, year = {1972}, abstract = {No abstract available}, subject = {Organische Chemie}, language = {de} } @article{BastChristlHuisgenetal.1973, author = {Bast, K. and Christl, Manfred and Huisgen, R. and Mack, W. and Sustmann, R.}, title = {Additionen des Benzonitriloxids an olefinische und acetylenische Dipolarophile}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-57905}, year = {1973}, abstract = {No abstract available}, subject = {Organische Chemie}, language = {de} } @article{ChristlMattauchIrngartingeretal.1986, author = {Christl, Manfred and Mattauch, B. and Irngartinger, H. and Goldmann, A.}, title = {Additionen von Benzvalen an Nitriloxide. Eine Synthese f{\"u}r Benzvalen-3-carbonitril}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-58269}, year = {1986}, abstract = {No abstract available}, subject = {Organische Chemie}, language = {de} } @article{ChristlHuisgen1968, author = {Christl, Manfred and Huisgen, R.}, title = {Alte und neue Cycloadditionen der Nitriloxide}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-30237}, year = {1968}, abstract = {No abstract available}, language = {de} } @article{Christl1981, author = {Christl, Manfred}, title = {Benzvalen - Eigenschaften und Synthesepotential}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-30041}, year = {1981}, abstract = {No abstract available}, language = {de} } @article{HerbertChristl1979, author = {Herbert, R. and Christl, Manfred}, title = {Bicyclo[2.1.1]hexane aus Tricyclo[3.1.0.0\(^{2,6}\)]hexanen}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-58042}, year = {1979}, abstract = {No abstract available}, subject = {Organische Chemie}, language = {de} } @article{ChristlHerzogNusser1986, author = {Christl, Manfred and Herzog, C. and Nusser, R.}, title = {Bicyclo[4.1.1]octa-2,4-dien, -oct-2-en, -oct-3-en und -octan aus Norpinen}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-58326}, year = {1986}, abstract = {No abstract available}, subject = {Organische Chemie}, language = {de} } @article{Christl1975, author = {Christl, Manfred}, title = {Carbon-13 Chemical Shifts and 13C-15N Coupling Constants of 3,4-Dihydroisoquinoline-15N, its 15N-Oxide and their Conjugate Acids}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-30071}, year = {1975}, abstract = {No abstract available}, language = {en} } @article{ChristlLeiningerBrunn1982, author = {Christl, Manfred and Leininger, Hartmut and Brunn, Erich}, title = {Carbon-13 Nuclear Magnetic Resonance Spectra of 7-Heterotetracyclo[4.1.0.02,4.03,5]heptanes. Annelation Effects of Aziridine, Oxirane, and Thiirane Rings. Unusual gamma and delta Substituent Effects}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-30010}, year = {1982}, abstract = {No abstract available}, language = {de} } @article{ChristlRoberts1972, author = {Christl, Manfred and Roberts, John D.}, title = {Carbon-13 Nuclear Magnetic Resonance Spectroscopy : Conformational Analysis of Methyl-Substituted Cycloheptanes, Cycloheptanols, and Cycloheptanones}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-41663}, year = {1972}, abstract = {The 130 chemical shifts were determined of the carbons in 12 cycloheptanes, 21 cycloheptanols, and 8 cycloheptanones. In some cyc1oheptanols and cyc1oheptanones, the assignments have been obtained unambiguously by the synthesis of deuterated derivatives and the use of paramagnetic-shift reagents. Substituent effects for the different types of groups have been calculated. The most informative data about the cyc10heptane conformations were provided by the relatively well understood I' effects. The results are generally in,good agreement with predictions based on the twist-chair form, which has been predicted by Hendrickson to be the most stable conformation. Pairs of cis-trans isomers are found to have rather characteristic differences in their 130 spectra. This fact was used to assign the resonances found for cis-trans mixtures of methyl-substituted cyc1oheptanols to specific isomers.}, language = {en} } @article{KimChristlKochl1990, author = {Kim, E. and Christl, Manfred and Kochl, J. K.}, title = {Charge-Transfer Cycloaddition of Homobenzvalene with Tetracyanoethylene}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-58537}, year = {1990}, abstract = {The transient yellow color observed in the cycloaddition of homobenzvalene (HB) with tetracyanoethylene (TCNE) is associated with the charge-transfer complex [HB, TCNE). The deliberate photoexcitation of [HB,TCNE) affords a mixture of charge-transfer cycloadducts (1, 2, and 3) that differs from that obtained in thermal cycloaddition. The relationship of {HB t TCNE•) radical-ion pair (as the critical reactive intermediate in charge-transfer cycloaddition) to the activation process for thermal cycloaddition is discussed.}, subject = {Organische Chemie}, language = {en} } @article{HegmannChristlPetersetal.1988, author = {Hegmann, Joachim and Christl, Manfred and Peters, Karl and Peters, Eva-Maria and Schnering, Hans Georg}, title = {Conjugated and Nonconjugated Cyclopentenones by a Reaction Cascade from Methyl 6-0xo-5-phenyl-1,3,4-oxadiazine-2-carboxylate and 1,3-Butadienes}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-30207}, year = {1988}, abstract = {No abstract available}, language = {en} } @article{Christl1973, author = {Christl, Manfred}, title = {Cycloaddition an Benzvalen}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-30217}, year = {1973}, abstract = {No abstract available}, language = {de} } @article{ChristlLanzendoerferGroetschetal.1990, author = {Christl, Manfred and Lanzend{\"o}rfer, U. and Gr{\"o}tsch, M. M. and Ditterich, E. and Hegmann, J.}, title = {Cycloadditionen von 1,3,4-0xadiazin-6-onen (4,5-Diaza-alpha-pyronen), 9 - 6-Oxo-5-phenyl-1,3,4-oxadiazin-2-carbons{\"a}ure-methylester - Synthese und Reaktionen mit Norbornen, Norbornadien, Cyclopropenen, Cyclobuten und Benzvalen}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-58569}, year = {1990}, abstract = {No abstract available}, subject = {Organische Chemie}, language = {de} } @article{ChristlLanzendoerferHegmannetal.1985, author = {Christl, Manfred and Lanzend{\"o}rfer, F. and Hegmann, J. and Peters, K. and Peters, E.-M. and Schnering, H. G. von}, title = {Cycloadditionen von 6-0xo-l,3,4-oxadiazinen (4,5-Diaza-α-pyronen), 3 : Reaktionen von 6-Oxo-2,5-diaryl-1,3,4-oxadiazinen mit Alkenen}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-58191}, year = {1985}, abstract = {Das bekannte 6-0xo-2,5-diphenyl-6H-l,3,4-oxadiazin (1 a) und die neuen 2,5-Diarylderivate 1 b - g lagern Alkene an, und es entstehen stickstofIfreie Produkte. Im Falle von Cyclopropenen und Cyclobuten bilden sich die a,p-unges{\"a}ttigten Siebenring-Enollactone 42 -45 bzw. das a,ß-unges{\"a}ttigte Achtring-Enollacton 47. 42a und d erleiden an basischem Aluminiumoxid die H-Verschiebung zu den ß,y-unges{\"a}ttigten Siebenring-Enollactonen 46a bzw. d. Bei weiteren Olefinen wurden die 'Y-Ketoketene des Typs 33 als Zwischenprodukte nachgewiesen oder sind aufgrund der Konstitution der Endprodukte wahrscheinlich. Aus 1 a werden mit Norbomen, Norbornadien, Cyc1openten, trans-Cycloocten und Styrol die Sechsring-Enollactone 10, 13, 15, 19 bzw. 21 und 22 erhalten. 10 isomerisiert mit Kalium-tert-butoxid zu 34, und die Methanolyse dieser Enollactone erbringt die diastereomeren Methy]ester 12 bzw. 35. Das y-Ketoketen 16 aus trans-Cycloocten nimmt schneller Wasser und Methanol zu 17 bzw. 18 auf als es zum Enollacton 19 cyclisiert. cis,trans-l,5-Cyc1ooctadien erbringt {\"u}ber die Stufe des nachgewiesenen y-Ketoketens 40 in einer intramolekularen [2 + 2J-Cyc1oaddition den Tricyclus 41. Tetracyclische Verbindungen des Typs 4 gehen aus der Umsetzung von Benzvalen (2) mit 1 hervor. Durch R{\"o}ntgenstrukturanalysen wurden Konstitution und Konfiguration von 10, 19 und 41 aufgekl{\"a}rt}, subject = {Organische Chemie}, language = {de} } @article{ChristlLanzendoerferGroetschetal.1993, author = {Christl, Manfred and Lanzend{\"o}rfer, U. and Gr{\"o}tsch, M. M. and Hegmann, J. and Ditterich, E. and H{\"u}ttner, G. and Peters, K. and Peters, E.-M. and Schnering, H. G. von}, title = {Cycloadditionen von 6H-1,3,4-0xadiazin-6-onen (4,5-Diaza-α-pyronen), 12 - Dieckmann-Kondensationen ohne Basen}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-58665}, year = {1993}, abstract = {No abstract available}, subject = {Organische Chemie}, language = {de} } @article{FeineisSchwarzHegmannetal.1993, author = {Feineis, E. and Schwarz, H. and Hegmann, J. and Christl, Manfred and Peters, K. and Peters, E.-M. and Schnering, H. G. von}, title = {Cycloadditionen von 6H-1,3,4-0xadiazin-6-onen (4,5-Diaza-α-pyronen), 13 - Diels-Alder-Reaktionen mit 6H-1,3,4-Oxadiazin-6-onen als Dienophil}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-58673}, year = {1993}, abstract = {No abstract available}, subject = {Organische Chemie}, language = {de} } @article{JelinekFinkChristlPetersetal.1991, author = {Jelinek-Fink, H. and Christl, Manfred and Peters, K. and Peters, E.-M. and Schnering, H. G. von}, title = {Cycloallene, 7 : Ein Siebenringallen-Dimer: Darstellung aus einem 7,7-Dibromnorcaran-Derivat und Thermolyse}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-58603}, year = {1991}, abstract = {No abstract available}, subject = {Organische Chemie}, language = {de} } @article{ChristlBraunWolzetal.1994, author = {Christl, Manfred and Braun, Martin and Wolz, E. and Wagner, W.}, title = {Cycloallene, 9 - 1-Phenyl-1-aza-3,4-cyclohexadien, das erste Isodihydropyridin: Erzeugung und Abfangreaktionen}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-58714}, year = {1994}, abstract = {No abstract available}, subject = {Organische Chemie}, language = {de} } @article{StanglJelinekFinkChristl1992, author = {Stangl, R. and Jelinek-Fink, H. and Christl, Manfred}, title = {Darstellung phenylsubstituierter Derivate des Tricyclo[4.1.0.0\(^{2,7}\)]heptans und des 1,2,3,4-Tetrahydro-1,2,3-methenonaphthalins}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-58610}, year = {1992}, abstract = {No abstract available}, subject = {Organische Chemie}, language = {de} } @article{ChristlLangReimannetal.1984, author = {Christl, Manfred and Lang, R. and Reimann, W. and Irngartinger, H.}, title = {Darstellung und R{\"o}ntgenstrukturanalyse des Diels-Alder-Addukts von 4-Phenyl-4H-1,2,4-triazol-3,5-dion an Octavalen}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-58162}, year = {1984}, abstract = {No abstract available}, subject = {Organische Chemie}, language = {de} } @article{BruentrupChristl1973, author = {Br{\"u}ntrup, Gisela and Christl, Manfred}, title = {Darstellung und Thermolyse der Hexamethyldewarbenzol-Cycloaddukte aromatischer Nitriloxide und des Diphenylnitrilimins}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-30257}, year = {1973}, abstract = {No abstract available}, language = {en} } @article{ChristlFreitag1976, author = {Christl, Manfred and Freitag, G.}, title = {Das Tricyclo[4.1.0.0\(^{2,7}\)]heptenyl-Kation, ein neues Isomer des Tropylium-Ions}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-57985}, year = {1976}, abstract = {No abstract available}, subject = {Organische Chemie}, language = {de} } @article{ChristlFreitagBruentrup1978, author = {Christl, Manfred and Freitag, G. and Br{\"u}ntrup, G.}, title = {Der Aufbau des Tetracyclo[4.1.0.0\(^{2,4}\).0\(^{3,5}\)]heptan-Systems durch Addition halogensubstituierter Carbene an Benzvalen}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-58019}, year = {1978}, abstract = {No abstract available}, subject = {Organische Chemie}, language = {de} } @article{ChristlHerbert1979, author = {Christl, Manfred and Herbert, R.}, title = {Der Einfluß anellierter Ringe auf die \(^{13}\)C-NMR-chemischen Verschiebungen von Tricyclo[3.1.0.0\(^{2,6}\)]hexan- und Bicyclo[2.1.1]hexan-Derivaten}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-58058}, year = {1979}, abstract = {No abstract available}, subject = {Organische Chemie}, language = {de} } @article{ChristlBrueckner1986, author = {Christl, Manfred and Br{\"u}ckner, D.}, title = {Der Einfluß von Phenylgruppen auf die Homokonjugation im Bicyclo[3.2.1]octa-3,6-dien-2-yl-Anion. Eine \(^{13}\)C-NMR-Studie}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-58288}, year = {1986}, abstract = {No abstract available}, subject = {Organische Chemie}, language = {de} } @article{ChristlLanzendoerferPetersetal.1983, author = {Christl, Manfred and Lanzend{\"o}rfer, F. and Peters, K. and Peters, E.-M. and Schnering, H. G. von}, title = {Die Reaktionen von 2,5-Diaryl-1,3,4-oxadiazin-6-onen mit trans-Cycloocten, cis,trans-Cyclooctadien und Cyclopropenen}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-58156}, year = {1983}, abstract = {The transient [4+2]-cycloadducts from the title components eliminate nitrogen to form a 3,4-dihydro-2-pyrone derivative, a tricyclic cyclobutanone derivative and 2,5-dihydrooxepin-2-one derivatives, respectively.}, subject = {Organische Chemie}, language = {de} } @article{HegmannChristlPetersetal.1988, author = {Hegmann, Joachim and Christl, Manfred and Peters, Karl and Peters, Eva-Maria and Schnering, Hans Georg von}, title = {Die Reaktionskaskade von 6-Oxo-5-phenyl-1,3,4-oxadiazin-2-carbons{\"a}ure-methylester und 1,3-Butadienen zu konjugierten und nichtkonjugierten Cyclopentenonen}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-58421}, year = {1988}, abstract = {F{\"u}nfgliedrige Carbocyclen sind Bauelemente zahlreicher NaturstofTe und daher attraktive Syntheseziele. Da bisher kein Syntheseverfahren mit großer Anwendungsbreite bekannt ist, sind neue Methoden willkommen. Wir berichten hier {\"u}ber Umsetzungen des Titelheterocyclus 1 mit l,3-Butadienen 1; diese Reaktionen, obwohl vielstufig, liefern im Eintopfverfahren konjugierte und nichtkonjugierte Cyclopentenone und gestatten auch die F{\"u}nfringanellierung.}, subject = {Organische Chemie}, language = {de} } @article{ChristlBruentrup1974, author = {Christl, Manfred and Br{\"u}ntrup, Gisela}, title = {Diimine Reduction and Ozonolysis of Benzvalene}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-57953}, year = {1974}, abstract = {Via reduction of benzvalene (1) with diirnine tricyclo[3.1.0.02•6]hexane is obtained in good yield. The procedure renders 3, which has already been synthesized by Lemal and Shim, accessible much easier and in larger quantities. IH and 13C n.m.r. spectroscopic data are discussed. Both the thermal and the AgBF4-catalyzed rearrangernent of 3 yield 1,3-cyclohexadiene (8). - The ozonolysis of 1 with subsequent LiAIH4-reduction results in cis-I,3- bis(hydroxyrnethyl)cyclobutane (13a).}, subject = {Organische Chemie}, language = {en} } @article{ChristlLueddeckeNagyreviNeppeletal.1977, author = {Christl, Manfred and L{\"u}ddecke, H.-J. and Nagyrevi-Neppel, A. and Freitag, G.}, title = {Einige Diels-Alder-Additionen des Benzvalens}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-57992}, year = {1977}, abstract = {No abstract available}, subject = {Organische Chemie}, language = {de} } @article{ChristlLechner1982, author = {Christl, Manfred and Lechner, M.}, title = {Einige Reaktionen des 8,8-Dibromtetracyclo[5.1.0.0\(^{2,4}\).0\(^{3,5}\)]octans}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-58108}, year = {1982}, abstract = {No abstract available}, subject = {Organische Chemie}, language = {de} } @article{ChristlKrimmKraft1990, author = {Christl, Manfred and Krimm, Stefan and Kraft, Arno}, title = {Einige Valene von benzanellierten f{\"u}nfgliedrigen Heteroarenen - Synthesen und NMR-Spektren}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-31559}, year = {1990}, abstract = {No abstract available}, language = {de} } @article{IrngartingerReimannLangetal.1990, author = {Irngartinger, H. and Reimann, W. and Lang, R. and Christl, Manfred}, title = {Electron Density Distribution in a Bicyclo[l.l.0]butane}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-31576}, year = {1990}, abstract = {No abstract available}, language = {en} } @article{GleiterBischofChristl1986, author = {Gleiter, Rolf and Bischof, Peter and Christl, Manfred}, title = {Electronic Structure of Octavalene : Photoelectron Spectroscopic Investigations}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-31588}, year = {1986}, abstract = {The He I photoelectron (PE) spectra of octavalene (5) as weil as its hydrogenated products 6-8 have been investigated. The assignment given is based on an empirical comparison of 5-8 with related compounds, a ZDO model, and semiempirical and ab initio calculations. Within the ZDO model the interaction between the buta.diene moiety and the bicyclobutane fragment of 5 is described by a resonance integral of -2.3 eV. The orbitalsequence of 5 is found tobe 2a\(_2\) (\(\pi\)-\(\sigma\)), 9a\(_1\) (\(\sigma\)), 3b1 (\(\pi\) - \(\sigma\)), 1a\(_2\) (\(\sigma\) + \(\pi\)), 2b\(_1\) (\(\sigma\) + \(\pi\)).}, subject = {Chemie}, language = {en} } @article{ChristlGerstnerKemmeretal.1994, author = {Christl, Manfred and Gerstner, E. and Kemmer, R. and Llewellyn, G. and Bentley, T. W.}, title = {Elektrophile Additionen an das Bicyclo[1.1.0]butan-System von 1-Phenyl- und 1-(4-Anisyl)tricyclo[4.1.0.0\(^{2,7}\)]heptan: S{\"a}ure-katalysierte Reaktionen mit Wasser und Methanol, Anlagerung von Essigs{\"a}ure und Oxymercurierung}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-58696}, year = {1994}, abstract = {No abstract available}, subject = {Organische Chemie}, language = {de} } @article{GerstnerKemmerChristl1994, author = {Gerstner, E. and Kemmer, R. and Christl, Manfred}, title = {Elektrophile Additionen an das Bicyclo[1.1.0]butan-System von Tricyclo[4.1.0.0\(^{2,7}\)]-heptan-Derivaten: Halogen-Elektrophile}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-58700}, year = {1994}, abstract = {No abstract available}, subject = {Organische Chemie}, language = {de} } @article{ChristlBraun1989, author = {Christl, Manfred and Braun, Martin}, title = {Freisetzung und Abfangreaktionen von 1-Oxa-2,3-cyclohexadien}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-58517}, year = {1989}, abstract = {Umsetzung von 6,6-Dichlor-2-oxabicyclo[3.1.0)hexan (4a) in Styrol mit n-Butyllithium lieferte neben Polystyrol und t-Chlor-1- pbenylhexan (6) in geringer Ausbeute die Tet~hydrocyclobutapyrane 5, die Abfangprodukte des aus 4a generierten t-Oxa-2,3- cyclobexadiens (3). Das unbest{\"a}ndige 6,6-Dibrom-2-oxabicyclo( J.l.O]hexan (4b) wurde bei -60°C erzeugt un~ bei -30°C mit Methyllithium in Gegenwart von Styrol umgesetzt, woraus die Produkte 5 mit 24\% Ausbeute hervorgingen. Als bei 20°C best{\"a}ndige Quelle f{\"u}r 3 erwies sich exo-6-Brom-e~o-6-fluor-2-oxabicyclo[ J.t.O]bexan (9), das aus 2,3-Dihydrofuran und Bromßuorcarben mit 25\% Ausbeute bereitet wurde. Behandlung von 9 in Styrol,