Benzannelated annulenes. 8. Toward the understanding of benzannelated annulenes: synthesis and properties of [a,h]- and [a,i]-ring dibenzannelated dihydropyrenes
Bond Fixation in a [14]Annulene: Synthesis, Characterization, and ab Initio Computations of Furan Adducts of Dimethyldihydropyrene
作者:Reginald H. Mitchell、Yongsheng Chen、Vivekanantan S. Iyer、Danny Y. K. Lau、Kim K. Baldridge、Jay S. Siegel
DOI:10.1021/ja953795w
日期:1996.1.1
dimethyldihydropyrene are prepared in order to test the postulate that bicyclic annelations are generally effective at inducing bond localization in aromaticsystems. A large 2-ppm down-field shift of the 1H NMR shifts of the internal methyl signals in 15 compared to 16 provides a significant indicator of bond localization in 15. X-ray diffraction analysis of 13 displays regular bond length alternation. Ab initio
Benzannelated annulenes. 8. Toward the understanding of benzannelated annulenes: synthesis and properties of [a,h]- and [a,i]-ring dibenzannelated dihydropyrenes
作者:Reginald H. Mitchell、Richard Vaughan Williams、Thomas W. Dingle