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Ruthenium(II) complexes of hybrid 8‐hydroxyquinoline–thiosemicarbazone ligands: synthesis, characterization and catalytic applications
Author(s) -
Nirmala M.,
Manikandan R.,
Prakash G.,
Viswanathamurthi P.
Publication year - 2014
Publication title -
applied organometallic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.53
H-Index - 71
eISSN - 1099-0739
pISSN - 0268-2605
DOI - 10.1002/aoc.3052
Subject(s) - chemistry , ruthenium , semicarbazone , medicinal chemistry , catalysis , stereochemistry , organic chemistry
A series of new hexa‐coordinated ruthenium(II) hydroxyquinoline–thiosemicarbazone complexes of the type [Ru(CO)(EPh 3 )(B)(L)] (E = P or As; B = PPh 3 , AsPh 3 or Py; L = hydroxyquinoline–thiosemicarbazone) were synthesized by reacting ruthenium precursor complexes [RuHCl(CO)(EPh 3 ) 2 (B)] (E = P or As; B = PPh 3 , AsPh 3 or Py) with hydroxyquinoline–thiosemicarbazone ligands in ethanol. The new complexes were characterized by analytical and spectroscopic (FT‐IR, UV–visible, NMR ( 1 H, 13 C and 31 P) and fast atom bombardment (FAB)–mass spectrometric methods. Based on the spectral results, an octahedral geometry was assigned for all the complexes. The new complexes showed good catalytic activity for the conversion of aldehydes to amides in the presence of hydroxylamine hydrochloride–sodium bicarbonate and for the oxidation of alkanes into their corresponding alcohols and ketones in the presence of m ‐chloroperbenzoic acid. The complexes also catalyzed the N ‐alkylation of benzylamine in the presence of KO t Bu in alcohol medium. Copyright © 2013 John Wiley & Sons, Ltd.