Pradhumn Singh, Monika Singh, A. Singh
Nov 15, 2009
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Influential Citations
39
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Journal
Journal of Organometallic Chemistry
Abstract
The reactions of PhSe − , PhS − and Se 2− with N -{2-(chloroethyl)}pyrrolidine result in N -{2-(phenylseleno)ethyl}pyrrolidine ( L1 ), N -{2-(phenylthio)ethyl}pyrrolidine ( L2 ), and bis{2-pyrrolidene- N -yl)ethyl selenide ( L3 ), respectively, which have been explored as ligands. The complexes [PdCl 2 ( L1 / L2 )] ( 1 / 7 ), [PtCl 2 ( L1 / L2 )] ( 2 / 8 ), [RuCl(η 6 -C 6 H 6 )( L1 / L2 )][PF 6 ] ( 3 / 9 ), [RuCl(η 6 - p -cymene)( L1 / L2 )][PF 6 ] ( 4 / 10 ), [RuCl(η 6 - p -cymene)(NH 3 ) 2 ][PF 6 ] ( 5 ) and [Ru(η 6 - p -cymene)( L1 )(CH 3 CN)][PF 6 ] 2 ·CH 3 CN ( 6 ) have been synthesized. The L1 – L3 and complexes were found to give characteristic NMR (Proton, Carbon-13 and Se-77). The crystal structures of complexes 1 , 3 – 6 , 9 and 10 have been solved. The Pd–Se and Ru–Se bond lengths have been found to be 2.353(2) and 2.480(11)/2.4918(9)/2.4770(5) A, respectively. The complexes 1 and 7 have been explored for catalytic Heck and Suzuki–Miyaura coupling reactions. The value of TON has been found up to 85 000 with the advantage of catalyst’s stability under ambient conditions. The efficiency of 1 is marginally better than 7 . The Ru-complexes 3 and 9 are good for catalytic oxidation of primary and secondary alcohols in CH 2 Cl 2 in the presence of N -methylmorpholine- N -oxide (NMO). The TON value varies between 8.0 × 10 4 and 9.7 × 10 4 for this oxidation. The 3 is somewhat more efficient catalyst than 9 .