Synthesis, characterization and solid state structures of thiosemicarbazone palladacycles: Influence of hydrogen bonding in the molecular arrangement

Ruthenium(II) mediated C–H activation of substituted acetophenone thiosemicarbazones: Synthesis, structural characterization, luminescence and electrochemical properties

“…The addition of lithium bromide in basic medium to the reaction mixture was used to abstract proton and cyclometalation was achieved [29]. It has been observed that the ligands behave as dianionic terdentate and replaces one hydride, one chloride and one triphenylarsine from the ruthenium(II) precursor and the oxidation state of ruthenium remain unchanged during the formation of cyclometalated species.…”

“…The substituted acetophenone thiosemicarbazone ligands were prepared by modification of the following reported procedure [29]. A solution of 4 0 -substituted acetophenone (120-165 mg, 1 mmol), 4 0 -substituted-3-thiosemicarbazide (91-165 mg, 1 mmol) in catalytic amount of conc.…”

“…Rhodium mediated C-H activation of benzaldehyde thiosemicarbazones has been achieved recently, where the ligand behaved as a dianionic terdentate ligand [28]. In addition, palladium cyclometallated complexes containing acetophenone thiosemicarbazones have been reported and thiosemicarbazone act as terdentate C, N and S donors [29]. In view of different coordination modes of these ligands, we have focused our research interest on the reaction of acetophenone thiosemicarbazone ligands with ruthenium(II) carbonyl complexes.…”

Arene ruthenium(II) p-chloroacetophenone phenylthiosemicarbazone complex mediated transfer hydrogenation of ketones

“…Further, the catalytic activity of conformationally rigid diphosphine arene ruthenium(II) complexes in the transfer hydrogenation of various ketones has been reported [17]. Furthermore, transfer hydrogenation of aromatic ketones were successfully achieved by water-soluble arene ruthenium complexes containing an N,N-chelating 2,2'-dipyridylamine ligands [18].As a part of ongoing efforts to synthesize novel ruthenium complexes and to study their catalytic efficiency in transfer hydrogenation reactions [19], herein we describe the synthesis and characterisation of a series of cationic arene ruthenium(II) complexes containing thiosemicarbazones along with their catalytic activity in transfer hydrogenation of ketones.The substituted acetophenone thiosemicarbazone ligands (L1-L5) were prepared by modification of the reported procedure [20]. The general procedure for the preparation of the complexes is as follows.…”

“…The substituted acetophenone thiosemicarbazone ligands (L1-L5) were prepared by modification of the reported procedure [20]. The general procedure for the preparation of the complexes is as follows.…”