339117-45-2Relevant academic research and scientific papers
Mono- and tetranuclear cyclopalladated complexes with N′-(9-anthracenylidene)benzothiohydrazide: Syntheses, structures and catalytic applications
Babu, G. Narendra,Pal, Samudranil
, p. 42 - 47 (2016)
Reaction of PdCl2, LiCl, N′-(9-anthracenylidene)benzothiohydrazide (H2L, 2 Hs represent the thioamide NH proton and the 9-anthracenylidene peri proton) and NaOAc·3H2O in 1:2:1:1?mole ratio in methanol produced [Pd4(L)4] (1) in 75% yield. Treatment of 1 with PPh3(1:4.5?mole ratio) in acetone provided [Pd(L)(PPh3)] (2) in 72% yield. The molecular formulas of the diamagnetic and non-electrolytic 1 and 2 were established by elemental analyses. Molecular structures of 1 and 2 were determined by single crystal X-ray diffraction studies. In the tetranuclear 1, the palladium(II) centers are in distorted square-planar CNS2coordination environments created by four (L)2?, each of which acts as 5,6-membered fused chelate rings forming thioamidate-S, azomethine-N and 9-anthracenylidene peri-C donor to one metal center and uses the thioamidate-S atom to bridge a second metal center. In the mononuclear 2, (L)2?and PPh3assemble a distorted square-planar CNSP coordination environment around the palladium(II) center. Spectroscopic (IR, NMR and UV-Vis) measurements were also used to characterize 1 and 2. The catalytic properties of both complexes in the oxidative phenylacetylene homocoupling reaction were examined.
Complexes of cis-bis(triphenylphosphine)ruthenium(II) with N,S-donor thiobenzhydrazones of polycyclic aromatic aldehydes: Synthesis, properties and structures
Nagaraju, Koppanathi,Pal, Samudranil
, p. 102 - 108 (2014/03/21)
Reactions of [Ru(PPh3)3Cl2], H 2Ln (polycyclic aromatic aldehyde thiobenzhydrazones ArCHNNHC(S)Ph, n = 1-4 for Ar = 1-naphthalenyl, 9-anthracenyl, 9-phenanthryl and 1-pyrenyl, respectively) and NaOAc in 1:2:2 mol ratio in methanol produces ruthenium(II) complexes of formula cis-[Ru(PPh3)2(HL n)2] (1-4) in ～80% yields. Microanalysis (CHN), magnetic susceptibility, solution conductivity, spectroscopic (IR, UV-Vis, NMR and fluorescence) and cyclic voltammetric measurements have been used for the characterization of 1-4. The complexes are non-electrolytic and diamagnetic. In the electronic spectra, the complexes display multiple absorptions within 505-245 nm due to metal-to-ligand charge transfer and ligand centred transitions. The emission spectral features of 1-4 indicate ligand centred emissive states. Molecular structures of 3 and 4 have been determined by X-ray crystallography. In each of 3 and 4, two thioamidate-N,S coordinating (HL n)- and two mutually cis oriented PPh3 molecules assemble a distorted octahedral N2S2P 2 coordination sphere around the metal centre. Cyclic voltammograms of 1-4 show an oxidation response within E1/2 = 0.76-0.86 V (ΔEp = 90-100 mV) versus Ag/AgCl.
