TY - JOUR

T1 - Technetium(I) Carbonyl β-Diketonate Complexes with Ligands of Different σ-Donor and π-Acceptor Power: A Comparative Analysis

AU - Мирославов, Александр Евгеньевич

AU - Кочергина, Анастасия Романовна

AU - Сидоренко, Георгий Васильевич

AU - Гуржий, Владислав Владимирович

AU - Сахоненкова, Анна Павловна

AU - Гусев, Егор Глебович

AU - Чистый, Леонид Сергеевич

AU - Тюпина, Маргарита Юрьевна

PY - 2025/7/31

Y1 - 2025/7/31

N2 - Technetium-99 tetracarbonyl β-diketonates [99Tc-(dik)(CO)4] (dik = 2,4-pentanedionate (acetylacetonate, acac), 1-phenyl-4,4,4-trifluoro-1,3-butanedionate (benzoyltrifluoroacetonate,btfa), and 1,1,1,5,5,5-hexafluoro-2,4-pentanedionate (hexafluoroacetylacetonate,hfa)) were prepared by the reaction of[99TcBr(CO)5] in CCl4 with potassium salts of the correspondingβ-diketones. [99Tc(dik)(CO)4] reacts with imidazole and pyridineto form the corresponding tricarbonyl species [99Tc(dik)-(CO)3(Imd)] and [99Tc(dik)(CO)3(Py)]. The reaction of [99Tc-(dik)(CO)4] with triphenylphosphine initially yields the monophosphinecomplexes [99Tc(dik)(CO)3(PPh3)], which readilytransform into the bisphosphine dicarbonyl complexes [99Tc(dik)-(CO)2(PPh3)2]. The complexes obtained were characterized by IRand 1H, 19F, 31P, 99Tc NMR spectroscopy and, in most cases, by single crystal X-ray diffraction analysis. The composition−propertyrelationships and the mutual influence of ligands in technetium carbonyl β-diketonate complexes are discussed.

AB - Technetium-99 tetracarbonyl β-diketonates [99Tc-(dik)(CO)4] (dik = 2,4-pentanedionate (acetylacetonate, acac), 1-phenyl-4,4,4-trifluoro-1,3-butanedionate (benzoyltrifluoroacetonate,btfa), and 1,1,1,5,5,5-hexafluoro-2,4-pentanedionate (hexafluoroacetylacetonate,hfa)) were prepared by the reaction of[99TcBr(CO)5] in CCl4 with potassium salts of the correspondingβ-diketones. [99Tc(dik)(CO)4] reacts with imidazole and pyridineto form the corresponding tricarbonyl species [99Tc(dik)-(CO)3(Imd)] and [99Tc(dik)(CO)3(Py)]. The reaction of [99Tc-(dik)(CO)4] with triphenylphosphine initially yields the monophosphinecomplexes [99Tc(dik)(CO)3(PPh3)], which readilytransform into the bisphosphine dicarbonyl complexes [99Tc(dik)-(CO)2(PPh3)2]. The complexes obtained were characterized by IRand 1H, 19F, 31P, 99Tc NMR spectroscopy and, in most cases, by single crystal X-ray diffraction analysis. The composition−propertyrelationships and the mutual influence of ligands in technetium carbonyl β-diketonate complexes are discussed.

KW - technetium

KW - carbonyls

KW - diketonates

KW - IR spectra

KW - NMR spectra

KW - SCXRD

KW - mutual influence of ligands

UR - https://www.mendeley.com/catalogue/75b9ef66-12e5-3183-bdb6-12e68c539513/

U2 - 10.1021/acs.inorgchem.5c02391

DO - 10.1021/acs.inorgchem.5c02391

M3 - Article

VL - 64

SP - 16073

EP - 16087

JO - Inorganic Chemistry

JF - Inorganic Chemistry

SN - 0020-1669

IS - 31

ER -