Copper (II) chelates of tetradentate beta-ketomaines as mixed stationary phases for gas chromatography

Copper (II) chelates of tetradentate beta-ketoamines bis(acetylacetone) ethylenediimine (H(2)AA(2)en), bis (acetylacetone)-propylenediimine (H(2)AA(2)Pn), bis(acetylacetone) dl-stilbenedimine-(dl-H(2)AA(2)S) and bis(acetylacetone) meso-stilbenediimine (meso-H(2)AA(2)S) together with OV-101 have been examined as mixed stationary phase for gas chromatography (GC). ?he copper chelates (5%) and OV-101 (3%) were coated on Chromosorb G/NAW 60-80 mesh size. Thermoanalytical studies were carried out to ascertain the operating temperatures for stationary phases. The materials packed in stainless steel column s(3m x 3 mm i.d.) was examined for relative elution and separation of different organic compounds, including aliphatic hydrocarbons, aromatic hydrocarbons, heteroaromatic compounds, aldehydes, ketones and alcohols. The elution and resolution were compared with a column packed with OV-101 3% on Chromosorb G/NAW 60-80 mesh size. An increase in retention times, and kovats indices were observed with improvement in the resolution of alcohols, ketones and heteroaromatics on mixed stationary phases as compared to OV-101 using the same operating conditions. ?he mixed stationary phases OV-101, 3% with 5% AA(2)enCu or dl-AA(2)SCu have high promise for the separation of alcohols, ketones, hetroaromatics.

M I BHANGER ,A A MEMON ,M Y KHUHAWAR ,