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Inorg Chem
; 61(13): 5173-5177, 2022 Apr 04.
Article
in English
| MEDLINE
| ID: mdl-35319206
ABSTRACT
Calix[4]arene-analogous technetium supramolecules (1 and 2) were assembled using (NBu4)[Tc2(µ-Cl)3(CO)6] and neutral flexible bidentate nitrogen-donor ligands (L1 and L2) consisting of four arene units covalently joined via methylene units. The neutral homoleptic technetium macrocycles adopt a partial cone/cone-shaped conformation in the solid state. These supramolecules are the first example of fac-[Tc(CO)3]+ core-based metallocalix[4]arenes and second example of fac-[Tc(CO)3]+ core-based metallomacrocycles. Structurally similar fac-[Re(CO)3]+ core-based macrocycles (3 and 4) were also prepared using [Re(CO)5X] (where X = Cl or Br) and L1 or L2. The products were characterized spectroscopically and by X-ray analysis.