RT Journal Article
T1 Emerging trends in the coordination chemistry of thiazolidinone-containing polydentate ligands: unconventional binding modes in silver complexes
A1 Corredoira Vázquez, Julio
A1 Saa, Manuel
A1 García Santos, María Isabel
A1 Castiñeiras Campos, Alfonso
A1 Fondo Busto, María Matilde
K1 Crystal structure
K1 Diffraction
K1 Ligands
K1 Mathematical methods
K1 Metals
AB This work presents an efficient and straightforward method for obtaining two previously described thiazolidinone-based ligands, HAm4DHotaz (N′-(4-oxothiazolidin-2-ylidene)picolino-hydrazonamide) and Am4Eotaz (N′-(3-ethyl-4-oxothiazol-idin-2-ylidene)picolinohydrazonamide), with high yield and purity. Moreover, the reactivity of these ligands toward different Ag+ salts has been explored, resulting in the isolation of four novel coordination complexes: two mononuclear species, [Ag(HAm4DHotaz)2](NO3)·H2O (1·H2O) and [Ag(Am4Eotaz)2](NO3) (2), and two tetranuclear compounds, [Ag4(Am4DHotaz)4]·8H2O (3·8H2O) and [Ag4(Am4Eotaz)4(NO3)2(H2O)](NO3)2·1.18H2O (4·1.18H2O). The crystal structures of 1·H2O, 2, 4·1.18H2O, and 3·3DMF, the latter obtained by recrystallization of [Ag4(Am4DHotaz)4]·8H2O in dimethylformamide, have been determined. Notably, in 4·1.18H2O, the thiazolidinone moiety shows the unprecedented bridging mode μ2-κ1S:κ1S. In addition, 3·3DMF represents a rare example of a thiazolidinone-containing complex featuring a μ2-κ1N:κ1S bridge. Moreover, across these complexes, the Am4Rotaz (R = DH or E) ligands display five hitherto unknown coordination modes. These ligands, and the auxiliary donors (present in 4·1.18H2O), provide different Ag+ coordination environments: AgN4 cores with a seesaw geometry in the mononuclear complexes, and AgN2, AgN2S, AgN4, AgN2OS, AgN2S3 or AgN2O2S3 cores with varied geometries in the tetranuclear ones. Furthermore, structures of the polynuclear species reveal significant argentophilic Ag···Ag interactions, which play a key role in directing the formation of the multinuclear frameworks.
PB American Chemical Society
SN 0020-1669
YR 2025
FD 2025-06-27
LK https://hdl.handle.net/10347/43126
UL https://hdl.handle.net/10347/43126
LA eng
NO Corredoira-Vázquez, J., Saa, M., García-Santos, I., Castiñeiras, A., Fondo, M. (2025). Emerging trends in the coordination chemistry of thiazolidinone-containing polydentate ligands: Unconventional binding modes in silver complexes. "Inorganic Chemistry", vol. 64, nº 28, 14475-14486
NO Authors thank Consellería de Cultura, Educación, Formación Profesional e Universidades, Xunta de Galicia (ED431B 2023/19) and Universidade de Santiago de Compostela (2024-PU027-1) for financial support. J.C.V also thanks Xunta de Galicia for his Ph.D. fellowship (ED481A-2018/136)
DS Minerva
RD 30 abr 2026