Synthesis and X-ray crystal structures of some isothiosemicarbazone complexes

Abstract

Four complexes of a new isothiosemicarbazone ligand have been prepared and characterized as μ2-pip-(NiL)2 (1), MnL2 (2), UO2L(BrSal)BuOH (3) and (μ2-MoO2L)2 (4) (H2L = 2-hydroxyacetophenone S-allyl isothiosemicarbazone.hydrobromide, BrSal = 5-bromosalicylaldehyde, pip = piperazine). All four complexes were characterized by X-ray crystallography, IR and elemental analyses. Complex 1 has a square planar coordination geometry in a binuclear arrangement such that both Ni atoms are coordinated to the phenolic-O, azomethine-N and thioamide-N atoms of L, and the bridging piperazine occupies the fourth position. For complex 2, the Mn atom connects to two N2O tridentate ligands in a distorted octahedron. The pentagonal bipyramidal geometry of complex 3 is provided by the tetradentate N2O2 ligand, n-butanol, and two oxo ligands around the uranium center. Finally, in the binuclear Mo complex (4), two N2O ligands coordinate to each molybdenyl center, together with the phenoxide-O donor of the adjacent molecule.

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Acknowledgements

This work is supported by the Ferdowsi University of Mashhad (3/30266-1392/12/17).

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Takjoo, R., Mashmoul Moghadam, S.M., Amiri Rudbari, H. et al. Synthesis and X-ray crystal structures of some isothiosemicarbazone complexes. Transit Met Chem 44, 525–534 (2019). https://doi.org/10.1007/s11243-019-00310-w

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