TY  - JOUR
A1  - Christl, Manfred
A1  - Leininger, Hartmut
A1  - Mattauch, Brigitte
T1  - The <sup>13</sup>C NMR Spectra of Some Tricyclo[2.2.0.0<sup>2,6</sup>]hexane Derivatives : Unexpected High Field Absorptions Due to Additive gamma-anti Subsituent Effects
N2  - 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.
Y1  - 1983
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-41620
SN  - x
ER  - 
TY  - JOUR
A1  - Christl, Manfred
A1  - Leininger, Hartmut
A1  - Brückner, Dieter
T1  - On the Nature of the Bicyclo [3.2.1]octa-3,6-dien-2-yl Anion: A <sup>13</sup>C NMR spectroscopic study
N2  - No abstract available
Y1  - 1983
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-30060
ER  -