Proceedings of the NATO Advanced Research Workshop, Debrecen, Hungary, August 29--September 1, 1994Preface. NATO Advanced Research Workshop on aqueous organometallic chemistry and catalysis in Debrecen, Hungary; L.T. Horv?th. The catalytic properties of water soluble phosphine complexes; M.T. Beck. Early work on catalysis by water soluble transition metal phosphine complexes; F. Jo?. Summery of the round table discussion of the state of the art and future directions of aqueous organometallic chemistry and catalysis; L.T. Horv?th, F. Jo?. Transition metal catalyzed reactions of olefins in water: olefin metathesis and isomerization; R.H. Grubbs. Aqueous organometallic chemistry: effects of a reactive solvent; F. Jo?, et al. Aqueous chemistry and catalytic activity of organometallic iridium complexes; J.S. Merola, et al. Organometallic radical chemistry in aqueous solution; D.R. Tyler. The use of 1,3,5-triaza-7-phosphaadamantane (PTA), a water-soluble, air stable ligand, in organometallic chemistry and catalysis; D.J. Darensbourg, et al. Recent developments in metal catalyzed biphasic reactions; V. Grushin, A. Alper. Counter phase transfer catalysis by water-soluble phosphine complexes; T. Okano. Metal-catalyzed hydrophosphination as a route to water-soluble phosphines; P.G. Pringle, et al. Aqueous media in the intramolecular Heck reaction; D.B. Grotjahn, X. Zhang. New efficient water-soluble catalysts for two-phase olefin hydroformylation; W.A. Herrmann, et al. Rhodium and Palladium water-soluble complexes in the carbonylation reactions. Improvements in the transfer between the organic and aqueous phases; F. Monteil, et al. New water soluble phosphines for organometallic chemistry and catalysis in the aqueous phase; B.E. Honson, et al. Hexaaquaruthenate(II) as a catalyst precursor in aqueous organometallic catalysis; A. C. B?yei. Ruthenium-catalyzedoxidation of chlorinated hydrocarbons in aqueous medium; M. Bressan. Hydrosoluble ligands l9