Optical Exaltation in Aromatic Compounds

Abstract

IT is known that the molecular refraction, as defined by Lorenz–Lorentz, of liquid (non-aromatic and non-conjugated) organic compounds may be calculated with fair accuracy by summation of the atomic refractions and the contributions to structural influences which may play a part (for example, olefinic double bonds). For aromatic compounds this additive character of the molecular refraction does not apply. Here the value measured is nearly always greater than the sum of the atomic refractions and contributions due to double bonds.