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<p>A fluorinated tripodal ligand, 1,3,5-tris(5,6-difluorobenzimidazol-1-ylmethyl)benzene (L), was designed, synthesized, and characterized. Ligand L was subsequently employed as building block to prepare fluorinated metallocages (<b>1</b> = <i>fac</i>-[{Re(CO)<sub>3</sub>(bim)}<sub>3</sub>(L)] and <b>2</b> = <i>fac</i>-[{Re(CO)<sub>3</sub>(Fbim)}<sub>3</sub>(L)]) via a one-pot approach using Re<sub>2</sub>(CO)<sub>10</sub> and benzimidazole (bim-H)/5,6-difluorobenzimidazole (Fbim-H). Both the metallocages were characterized using ATR-IR, NMR spectroscopy and mass spectrometry. The NMR spectra of the cages displayed simple and symmetrical patterns, with characteristic upfield and downfield shifts for the protons of both coordinated ligands, indicating that the synthesized complexes adopt the expected cage architecture.</p> Graphical abstract <p>A fluorinated tripodal ligand (L) was synthesized and used to construct two fluorinated Re(I) metallocages via a one-pot method. ATR-FTIR, ¹H NMR, and mass spectrometry confirmed their formation. Simple, symmetric NMR patterns with characteristic shifts confirmed&#xa0;coordination and the expected cage architecture.</p> <p></p>

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Self-assembly and structural characterization of fluorine-decorated rhenium(I) heteroleptic metallocages

  • 期刊论文

  • 发表日期：

    2026年5月15日

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  • Bharathi Bhanoth,
  • W Keerthi,
  • Reema L Borkar,
  • Malaichamy Sathiyendiran

摘要

A fluorinated tripodal ligand, 1,3,5-tris(5,6-difluorobenzimidazol-1-ylmethyl)benzene (L), was designed, synthesized, and characterized. Ligand L was subsequently employed as building block to prepare fluorinated metallocages (1 = fac-[{Re(CO)3(bim)}3(L)] and 2 = fac-[{Re(CO)3(Fbim)}3(L)]) via a one-pot approach using Re2(CO)10 and benzimidazole (bim-H)/5,6-difluorobenzimidazole (Fbim-H). Both the metallocages were characterized using ATR-IR, NMR spectroscopy and mass spectrometry. The NMR spectra of the cages displayed simple and symmetrical patterns, with characteristic upfield and downfield shifts for the protons of both coordinated ligands, indicating that the synthesized complexes adopt the expected cage architecture.

Graphical abstract

A fluorinated tripodal ligand (L) was synthesized and used to construct two fluorinated Re(I) metallocages via a one-pot method. ATR-FTIR, ¹H NMR, and mass spectrometry confirmed their formation. Simple, symmetric NMR patterns with characteristic shifts confirmed coordination and the expected cage architecture.