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
The preparation and the spectroscopic properties of 2,7-polymethylene-4, 5-benzotropones are described. The trends in these properties with decreasing number of methylene groups in the polymethylene ring are due to the steric inhibition of the benzotropylium resonance.
Preparation of 2,7-polymethylene-4,5-benzotropylium perchlorates
作者:Robert E. Harmon、Robert Suder、S. K. Gupta
DOI:10.1139/v70-030
日期:1970.1.1
The first synthesis of 2,7-polymethylene-4,5-benzotropylium perchlorates has been achieved by reduction of the carbonyl function in 2,7-polymethylene-4,5-benzotropones and subsequent treatment with perchloric acid.