Bridged [18]annulenes. 12b,12c,12d,12e,12f,12g-Hexahydrocoronene and its mono- and dibenzo analogs. Ring-current contribution to chemical shifts as a measure of degree of aromaticity
Bridged [18]annulenes. 12b,12c,12d,12e,12f,12g-Hexahydrocoronene and its mono- and dibenzo analogs. Ring-current contribution to chemical shifts as a measure of degree of aromaticity