
%0 Journal Article
%A Jia, XY 
%A Bremner, JB 
%A Skelton, BW 
%A White, AH 
%A Winzenberg, KN 
%T Crystal-Structures of 2 3-Substituted 10,11-Dimethoxy-1,2,3,4,5,6-Hexahydro-7,9-etheno-3-benzazecine Derivatives
%J Australian Journal of Chemistry
%D 1989/02/01
%V 42
%N 2
%P 321-327
%K 
%R https://doi.org/10.1071/CH9890321
%U https://www.publish.csiro.au/paper/CH9890321 
%X The title compounds are 3-aza[6](1,7)-naphthalenophanes with 3-Me and 3-CO2Me substituents, C18H23NO2 and C19H23NO4; in the former the chemical shift of the naphthalene hydrogen enclosed by the medium nitrogen-containing ring is the highest yet observed in a derivative of this type ( &#963; 9.33). In order to examine the environment of this hydrogen atom and the expected associated naphthalene ring distortions in both compounds, single-crystal X-ray structure determinations have been carried out at 295 K showing the transannular H&#8230;N distance in the methyl derivative to be remarkably short at 2.08(2) Å . Crystals are triclinic, P1, a 11.683(3), b 10.846(3), c 6.729(2) Å, &#945; 90.08(2), &#946; 93.33(2), &#947; 112.88 Z 2; R was 0.041 for 1378 'observed' reflections. Crystals of the 3-CO2Me derivative are also triclinic, P1, a 12.587(9), b 10.650(4), c 6.758(3) Å , a 91.91(3), &#946; 100.51(4), &#947; 104.74(5)&#176; Z 2; R 0.067 for 1267 'observed' reflections. 
