Preparation and properties of some benzotropylium perchlorates
作者:Robert E. Harmon、Robert Suder、S. K. Gupta
DOI:10.1039/p19720001746
日期:——
variety of substituted benzotropyliumperchlorates, 6,8-polymethylenebenzotropylium perchlorates, and 6,6′:8,8′-bispolymethylenedi(benzotropyliumperchlorate)s are described. In addition, evidence for the existence of 1a,3-polymethylenebenzohomotropylium cations is presented. By n.m.r. spectroscopy it has been shown that the positive charge (or charges) in these benzotropylium ions is delocalized over