In 1890, Bamberger proposed that it was associated with six residual valencies in each molecule, an idea which was given an electronic interpretation by Robinson. According to molecular orbital theory, it requires a planar molecule with a cyclic pi orbital having four n plus two pi electrons, and the measure of it is the extent of pi electron delocalization. FTP, identify 
In 1890, Bamberger proposed that it was associated with six residual valencies in each molecule, an idea which was given an electronic interpretation by Robinson. According to molecular orbital theory, it requires a planar molecule with a cyclic pi orbital having four n plus two pi electrons, and the measure of it is the extent of pi electron delocalization. FTP, identify this term from organic chemistry, which refers to compounds like pyridine, napthalene and benzene, and which was given because the oils they constituted had a pleasant smell.
In 1890, Bamberger proposed that it was associated with six residual valencies in each molecule, an idea which was given an electronic interpretation by Robinson.
{aromatic}ity