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Abstract
The retention behaviour of various organometallic complexes in HPLC has been investigated. Three polar adsorbents (silica, a CN-bonded and a diol-bonded stationary phase) and a nonpolar adsorbent (C18-bonded stationary phase) were used in this study for normal phase LC and reversed-phase LC respectively. The retention is influenced by the type of metal atom and the type of ligand in both types of LC. The study includes complexes of iron, ruthenium, cobalt, manganese, molybdenum and nickel with di-aza-butadiene and tetra-azadiene ligands. It was found that some ruthenium complexes are not eluted from bare and chemically modified silica.