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2 + 1 Tricarbonyl Complexes of Technetium(I) with a Combination of <i>N</i>,<i>N</i>-Bidentate Ligands and Ethyl Isocyanoacetate: How Strong Is the Interfering Effect of Chloride Ions on Their Formation?статья
Статья опубликована в высокорейтинговом журнале
Статья опубликована в журнале из списка Web of Science и/или Scopus- Авторы: Sidorenko Georgy V., Miroslavov Alexander E., Tyupina Margarita Yu, Gurzhiy Vladislav V., Sakhonenkova Anna P., Lumpov Alexander A.
- Журнал: Inorganic Chemistry
- Год издания: 2023
- Издательство: American Chemical Society
- Местоположение издательства: United States
- DOI: 10.1021/acs.inorgchem.3c02204
- Аннотация: Technetium(I) 2 + 1 tricarbonyl complexes with acombination of N,N-bidentate ligands (2,2′-bipyridine, bipy; 1,10-phenanthroline, phen) and ethyl isocyanoacetate were prepared andcharacterized by NMR, IR, UV/visible, and luminescence spectroscopiesand by high-performance liquid chromatography (HPLC). Thecrystal structures of [99Tc(CO)3(bipy)(CNCH2COOEt)](ClO4) (inthe form of a solvate with 0.5CH2Cl2) and [99Tc(CO)3(phen)-(CNCH2COOEt)](ClO4) (in the form of an adduct with an outerspherephen molecule) were determined by single-crystal X-raydiffraction. To evaluate the interfering effect of chloride ions on theformation of the 2 + 1 complexes, the kinetics of the replacement oflabile monodentate ligand X in the complexes [MX(CO)3(N∧N)] (M= Re, 99Tc; N∧N = bipy, phen; X = Cl−, ClO4−) by CNCH2COOEt inethanol were compared. The 99Tc bipy complexes with X = ClO4− (according to the IR data, perchlorate anion in ethanol isdisplaced from the coordination sphere by the solvent molecule) and X = Cl− are characterized by close ligand replacement rates. Inthe case of the 99Tc complexes with phen and Re complexes with both phen and bipy, the chloride complexes are appreciably lessreactive than the chloride-free complexes. The technetium complexes are considerably more reactive in ligand replacement than theirrhenium analogues. In the chloride-containing medium (saline), the complex [99mTc(CO)3(bipy)(CNCH2COOEt)]+ can beprepared under the conditions acceptable for nuclear medical applications, although higher isonitrile concentrations are required ascompared to the chloride-free system.
- Добавил в систему: Тюпина Маргарита Юрьевна