Structure of the binuclear 3,7-dimethylene-bicyclo[3.3.1]nonane-silver nitrate- Eu(fod)3 complex by PMR spectroscopy

The reactions of 3,7-dimethylenebicyclo[3.3.1]nonane, norbornadiene and cis,cis-1,5-cyclooctadiene with pentafluoro-λ6-sulfanyl chloride

“…According to the Fukui's orbital mixing rule [45], the favorable steric arrangement for transannular cyclization is not only spatial closeness of the two p-bonds, but also their position in the same plane. Thus, UV and photo-electronic spectra data prove interaction of double bonds and splitting of p-levels for the dienes 1 [46] and 3 [47], that favors their transannular cyclization. On the contrary, the conformational mobility of the diene 8 proved by unlimited number of conformations and in particular twist-boat form for its close analogue 1,7-dibromocis,cis-cycloocta-1,5-diene determined by X-Ray structural analysis [48] hampers transannular cyclization of cis,cis-1,5-cyclooctadiene.…”

Bound shifts and association constants of olefins and aromatics with silver-ytterbium binuclear shift reagents

“…There is very little available structural data for complexes of unsaturated hydrocarbons with binuclear shift reagents. Krasutski et al have reported the X-ray crystal structure of the complex between AgN03 and 3,7-dimethylenebicyclo[3.3.1]nonane (25), and they studied the effects of AgN03-Eu(fod)3 and AgEu(fod)4 on the NMR spectrum of the diene (25)(26)(27). They also investigated the interaction of norbornadiene with AgEu(fod)4 (28).…”