@article{ChristlLeiningerMattauch1983, author = {Christl, Manfred and Leininger, Hartmut and Mattauch, Brigitte}, title = {The 13C NMR Spectra of Some Tricyclo[2.2.0.02,6]hexane Derivatives : Unexpected High Field Absorptions Due to Additive gamma-anti Subsituent Effects}, isbn = {x}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-41620}, year = {1983}, abstract = {By means of the BC NMR spectra of tricyclo{2.2.0~rfJ6Jhexane and thirteen of its derivatives the effects of substituents in endo-3- and endo-5-positions on the HC chemical shifts have been determined. The y-anti effects are at least as Jarge as in monosubstituted cyc1obutanes, where the shielding values of second-row hetero substituents exceed those in unstrained systems by far, and higher-row and carbon substituents still cause substantial upfield shifts. In the title system the y-anti effect of a substituent in the endo-3- and endo-5-position are operative additively, and thus shift the absorption of C-J upfieJd by a maximum of 27 ppm with respect to the unsubstituted hydrocarbon.}, language = {en} } @article{ChristlLeiningerBrueckner1983, author = {Christl, Manfred and Leininger, Hartmut and Br{\"u}ckner, Dieter}, title = {On the Nature of the Bicyclo [3.2.1]octa-3,6-dien-2-yl Anion: A 13C NMR spectroscopic study}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-30060}, year = {1983}, abstract = {No abstract available}, language = {en} }