Thiosemicarbazonates of copper: Crystal structures of [(furan-2-acetaldehyde-N-phenyl-thiosemicarbazonato)][bis(triphenylphosphine)]copper(I) and [bis(furan-2-formaldehyde-N-phenyl-thiosemicarbazonato)]copper(II)

Add time:07/21/2019    Source:sciencedirect.com

Equimolar reactions of furan-2-formaldehyde-N1-phenylthiosemicarbazone [(C4H3O)(H)C2N3-N2(H)-C1(S)-N1HPh; HftscN-Ph)] and furan-2-acetaldehyde-N1-phenylthiosemicarbazone; [(C4H3O)(CH3)C2N3-N2(H)-C1(S)-N1HPh, HaftscN-Ph] with Cu(OAc)(PPh3)2 in methanol has yielded N,S-chelated CuI complexes, [Cu(κ2-N,S-ftscN-Ph)(PPh3)2] 1 and [Cu(κ2-N,S-aftscN1-Ph)(PPh3)2] 2. Similarly, reactions of Cu(OAc)2·H2O with HftscN-Ph and HaftscN-Ph in 1:2 M ratio (Cu:L) in acetonitrile-methanol (1:1, v/v) has yielded N,S-chelated CuII complexes, [Cu(κ2-N,S-ftscN-Ph)2] 3 and [Cu(κ2-N,S-aftscN-Ph)2] 4. These complexes have been characterized using elemental analysis, IR, UV–Vis, X-band ESR (3, 4), and single crystal X-ray crystallography (2, 3). ESR spectroscopy has supported axial symmetry of complex 3 confirmed by X-ray crystallography, while it revealed rhombic environments for complex 4. Complexes 1 and 2 represent rare examples of CuI in the domain of coordination chemistry of furan based anionic thiosemicarbazones in which the thio-ligands bind as anions in N3,S-chelation mode.

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