@article{ChristlReichRoberts1971, author = {Christl, Manfred and Reich, H. J. and Roberts, J. D.}, title = {Nuclear Magnetic Resonance Spectroscopy. Carbon-13 Chemical Shifts of Methylcyclopentanes, Cyclopentanols, and Cyclopentyl Acetates}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-57862}, year = {1971}, abstract = {No abstract available}, subject = {Organische Chemie}, language = {en} } @article{ChristlRoberts1972, author = {Christl, Manfred and Roberts, J. D.}, title = {Nuclear Magnetic Resonance Spectroscopy : Carbon-13 Chemical Shifts of Small Peptides as a Function of pH}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-57885}, year = {1972}, abstract = {No abstract available}, subject = {Organische Chemie}, language = {en} } @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{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{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{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{ChristlHeinemannKristof1975, author = {Christl, Manfred and Heinemann, U. and Kristof, W.}, title = {Thermal Rearrangement of Some Endo-Endo'-Bridged Bicyclo[1.1.0]butanes}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-57967}, year = {1975}, abstract = {No abstract available}, subject = {Organische Chemie}, language = {en} } @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{VolzShinPrinzbachetal.1978, author = {Volz, H. and Shin, J.-H. and Prinzbach, H. and Babsch, H. and Christl, Manfred}, title = {Stability of Tricyclo[4.1.0.0\(^{2,7}\)]heptenyl-Cations}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-58001}, year = {1978}, abstract = {No abstract available}, subject = {Organische Chemie}, language = {en} } @article{ChristlHerbert1979, author = {Christl, Manfred and Herbert, R.}, title = {Unusual Carbon Shielding Effects of Cyclopropanes and Double Bonds in Strained Bicyclo[3.1.0]hexanes and Cyclopentenes}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-58038}, year = {1979}, abstract = {Carbon-13 shieldings and one-bond \(^{13}\)C-H coupling constants of bicydo[2.1.1]hexane, bicydo[2.l.l]hex- 2-ene, tricydo[3.1.1.0\(^{2.4}\)]heptane and benzvalene are presented and compared. to the data of related. compounds. H a bicydo[3.1.0]hexane system is part of a rigid skeleton, the cydopropane ring exerts spedfk: 'Y substituent eflects of two ldnds. In the case of the bicyclobexane boat form an upfield shift of the C-3 signal is observed and in tbe esse of the chair form a downfield shift of 15-20 ppm. Compared to the corresponding cydopentanes the double bond in strained cydopentenes causes downfield shifts of the C-4 absorption. 1bis eftect increases witb increasing strain, reaching 8 45.9 ppm maximum in benzvalene. Hence it is tbe only known bicydo[l.l.O]butane baving 8 reversed order of carbon shieldings. The downfield shifts are e:xplained by means of simple orbital interaction schemes.}, subject = {Organische Chemie}, language = {en} }