tailieunhanh - Synthesis and structural characterization of palladium(ii) complexes with tetradentate n2o2 and bidentate no-donor salicylaldehyde schiff base ligands

In this study, a salen-type (R)- and (S)-N-5-tert-butyl-salicylidene-1-phenylethylamine Schiff base ligands and their Pd(II) complexes were synthesized and characterized by ESI-MS, IR and NMR spectroscopies. The ligands were synthesized from the condensation of ethylenediamine with 5-fluoro-salicylaldehyde and (R)- or (S)-1-phenylethylamine with 5-tertbutyl-salicylaldehyde with high yields of 96, %. Their corresponding Pd(II) complexes were formed with yields around 76 %. | Vietnam Journal of Science and Technology 55 (5B) (2017) 86-93 SYNTHESIS AND STRUCTURAL CHARACTERIZATION OF PALLADIUM(II) COMPLEXES WITH TETRADENTATE N2O2 AND BIDENTATE NO-DONOR SALICYLALDEHYDE SCHIFF BASE LIGANDS Lam Quang Hai1, Nguyen Van Tuyen2, *, Nguyen Quang Trung2, Nguyen Thi Bich Huong3, Dang Thi Tuyet Anh2 Oil and gas production division - Joint venture “Vietsovpetro”, 17 Le Quang Dinh street, Thang Nhat ward, Vung Tau city 1 2 Institute of Chemistry -VAST, 18 Hoang Quoc Viet street, Cau Giay district, Ha Noi city 3 Department of Chemistry, Faculty of Science - Military Academy of Logistics, Ngoc Thuy precinct, Long Bien district, Ha Noi city * Email: Received: 15 August 2017, Accepted for publication: 5 October 2017 ABSTRACT In this study, a salen-type (R)- and (S)-N-5-tert-butyl-salicylidene-1-phenylethylamine Schiff base ligands and their Pd(II) complexes were synthesized and characterized by ESI-MS, IR and NMR spectroscopies. The ligands were synthesized from the condensation of ethylenediamine with 5-fluoro-salicylaldehyde and (R)- or (S)-1-phenylethylamine with 5-tertbutyl-salicylaldehyde with high yields of 96, %. Their corresponding Pd(II) complexes were formed with yields around 76 %. Keywords: Pd(II)-complexes, synthesis, characterization. 1. INTRODUCTION Schiff bases are an important class of ligands in coordination chemistry and typically prepared by the condensation of a primary amine with an aldehyde or ketone. They have been studied extensively because of their selectivity and sensitivity towards various metal ions [1]. Schiff bases have been widely used in many fields ., as chelating ligands in coordination chemistry, as catalysts in catalytic reactions, as anti-oxidative, anti-bacterial, anti-biotics, antiinflammatory agents in biological activities, etc. A large number of Schiff base complexes have been reported so far, and their catalytic and biological properties have also been studied intensively. .