In the 1-azonia-acenaphthene salts 6b and 9, the N+-Cperi bond is modestly elongated. While no clear-cut influence of the peri-stress is obvious, incorporation of Cperi in a triarylmethyl structure has a bond-lengthening effect. However, the stretching forces are insufficient to restore the ideal geometry of the naphthalene skeleton.
A simple, efficient, and mild method for the selective bromination of some activated aromatic compounds using N-benzyl N,N dimethyl anilinium peroxodisulfate in the presence of potassium bromide in non-aqueous solution is reported. The results obtained revealed good to excellent selectivity between the ortho and para positions of phenols and methoxyarenes.