121st General Meeting of the KCS

Type Poster Presentation
Area Inorganic Chemistry
Room No. Event Hall
Time 4월 19일 (목요일) 11:00~12:30
Code INOR.P-192
Subject Mechanochemically induced synthesis of Ru, Rh, and Ir based macro-metallacycles via C–H activation
Authors YOUNGHUN KIM, MOON-GUN CHOI*
Department of Chemistry, Yonsei University, Korea
Abstract In recent, metalla-macrocycles have attracted great attention because of structural diversities depending on the various coordination environments surrounding metal units and multifunctional organic ligands, and its noteworthy host-guest properties. To construct metalla-macrocycles, transition metal based half sandwich fragments (e.g. Ru, Rh, or Ir) are used due to inducing simple synthetic methods and high yields. A mechanochemical reaction, which is induced by kinetic energies from milling or grinding under solvent-free conditions, has become a substitute of pre-existing syntheses in the solution in terms of green chemistry. A mechanochemical reaction usually results higher yields, faster rates of reaction, and preventing toxic wastes from any organic solvents. Especially, a mechanochemical reaction using transition metal based moiety has various applications such as catalytic reactions, mononuclear metal complexes, and multi-dimensional networked compounds (e.g. coordination polymers or metal-organic frameworks). Nevertheless, a study of mechanochemical reactions of multi-nuclear metal complexes is still rare. Our group synthesize binuclear metalla-macrocycles through the cyclometallation by C–H activation of multitopic ligand, 5-(pyridine-3-yloxy)isophthalic acid, and N-donor coordination with half sandwich fragments of [(p-cymene)Ru(OAc)2], [Cp*Ir(OAc)2] and [Cp*Rh(OAc)2]. Binuclear metalla-macrocycles were characterized by 1H NMR, Infrared spectroscopy, and elemental analysis. Consequently, the data was matched similarly with the products prepared by the reaction in the solution. The 3-D crystal structures of binuclear metalla-macrocycles were illustrated by a single crystal X-ray analysis.
E-mail younghun-kim@yonsei.ac.kr