... Please enable JavaScript to use all the features on this page. Tetrahedron. Volume 27, Issue 1, 1971, Pages 3-18. Cover image. ... " C D. Ncnitzescu, Carbonium Ions (Edited by GA Olah and P. v. R. Schleyer). Vol. II, p. 463. ... Chem. Commun. 426(1967); Tetrahedron 24. 5361. ...