Wydział Chemii

Zohreh Zabihollahi

Rahman Bikas

Moayad Hossaini-Sadr

Marzieh Emami

Tadeusz Lis

2025

Journal of Molecular Structure

1341

142614/1-142614/9

10.1016/j.molstruc.2025.142614

Naukowa

Angielski

Artykuł

Two mononuclear rhenium coordination compounds with hydrazone ligand, [ReOBr₂(PPh₃)(HL)]·(CH₃CN) (1) and [ReCl₂(PPh₃)₂(HL)]·(CH₃CN) (2), were synthesized by the reaction of ReOBr₃(PPh₃)₂ or ReOCl₃(PPh₃)₂ with H₂L in acetonitrile (H₂L = (E)-N'-(1-(4‑hydroxy-6-methyl-2-oxo-2H-pyran-3-yl)ethylidene)picolinohydrazide). Compounds 1 and 2 were characterized by spectroscopic methods and their structures were determined by single crystal X-ray analysis. Structural studies indicated that despite the similarity of the reactions and structures, the oxidation state of rhenium ion in 1 is mainly Re(V) but, in compound 2 it is reduced to Re(III) during the synthesis procedure. The hydrazone ligand in these compounds has similar coordination mode and it is coordinated as a bidentate N- and O-donor mononegative ligand, HL^-1. TGA analysis showed that these compounds are stable up to 200 °C and they decompose in two steps in the range of 200–700 °C. The intermolecular interactions in these compounds were investigated by Hirshfeld surface analysis which revealed there are several intermolecular C−H···N, C−H···X (X = Br and Cl) and C−H···π interactions which contribute in the stabilization of the crystal structures.

Rhenium coordination compound, Crystal structure, Hydrazone ligands, Hirshfeld surface analysis, Spectroscopic studies

http://dx.doi.org/10.1016/j.molstruc.2025.142614

http://www.elsevier.com