Synthesis and characterization of SiO2-supported ruthenium complexes containing aromatic sulfonamides: as catalysts for transfer hydrogenation of acetophenoneElectronic supplementary information (ESI) available. CCDC 872787-872789 contain the supplementary crystallographic data (excluding structure factors) for the structures reported in this article. For ESI and crystallographic data in CIF or other electronic format see DOI: 10.1039/c3dt32876g

• Main Authors: Dayan, Serkan, Kalayc o lu, Nilgün Özpozan, Dayan, Osman, Özdemir, Nam k, Dinçer, Muharrem, Büyükgüngör, Orhan
• Format: Article
• Language: English
• ISSN: 1477-9226; 1477-9234
• DOI: 10.1039/c3dt32876g

3-Amino- N -aryl-benzenesulfonamides ( 1-3 ) were successfully synthesized by the reaction of m -phenylenediamine and various benzenesulfonyl chlorides. Then, a series of ruthenium complexes ( 4-6 ) were prepared from the reaction of [RuCl 2 ( p -cymene)] 2 and 1-3 . Finally, SiO 2 -supported Ru( ii ) complexes ( 7-9 ) were prepared by an impregnation method. The synthesized compounds and materials were characterized by different methods such as NMR, FT-IR, TG/DTA, nitrogen adsorption-desorption (BET), SEM and EDX. Also, the solid state structures of 4-6 were determined by single-crystal X-ray diffraction. 4-9 were used as catalysts for the transfer hydrogenation of acetophenone. 4-9 showed good catalytic activity and so the effects of the different groups were also examined. For the transfer hydrogenation of acetophenone, 7-9 had similar activity to 4-6 . However, the longer lifetime of 7-9 makes them more advantageous than the non-supported catalysts ( 4-6 ) in terms of catalytic cycle. Therefore, the effect of SiO 2 was investigated as a catalyst and the results show that excess silicon( iv ) oxide was a surprisingly active catalyst for the hydrogenation of acetophenone under these conditions. A series of novel Ru( ii ) complexes containing sulfonamide ligands were synthesized and supported on SiO 2 for TH of acetophenone.