The aim of this thesis work was to investigate the solvatochromic properties of two molecules, namely 6-hydroxy-2-phenylpyridazin-3(2H)-one (A1) and N-(5,6-diphenylfuro[2,3-d]pyrimidin-4-yl)benzamine (A2), received from Ain Shams University at Roxy-Cairo, Egypt. Theoretical calculations were indicated a high dipole moment for both molecules, therefore a strong solvatochromic behavior was expected because of the easy polarizability.