RT Journal Article
T1 Cyclometallated platinum(II) complexes with small crown ether rings: appropriate choice of the bridging diphosphane to coordinate potassium cations
A1 Lucio-Martínez, Fátima
A1 Reigosa, Francisco
A1 Bermúdez, Brais
A1 Adams, Harry
A1 Pereira Lorenzo, María Teresa
A1 Vila Abad, José Manuel
K1 Platino
K1 Éteres corona
K1 Cationes de potasio
AB This account reports the synthesis and structural characterization of the first cyclometallated platinum(II) complex that coordinates a potassium cation in a sandwich arrangement via two 15-crown-5 ether rings within the same molecule. The cooperation of the two small crown ether moieties allows the entrapment of the non-ideal potassium ion. The reaction of the parent thiosemicarbazone ligand 3,4-(C8H16O5)C6H3C(Me) NN−(H)C( S)NHMe, 1, containing the crown ether ring, with K2[PtCl4], or alternatively with PtCl2(DMSO)2, and subsequent treatment with the diphosphanes Ph2PCH2PPh2 (dppm) and Ph2PC( CH2)PPh2 (vdpp) produced the double nuclear platinacycles 3a, 3b, and 4, probably via formation of the 2a and 2b intermediates. Complex 3a with the K+ cation in a sandwich coordination was slightly mixed with 3b lacking any K+. Alternatively, reaction of 1 with K2[PtCl4] or with PtCl2(DMSO)2 followed by the diphosphane Ph2PC( CH2)PPh2 (vdpp) only gave the dinuclear phosphane-bridged compound 4; this highlights the importance of choosing the right diphosphane ligand. Density functional theory calculations (B3LYP-D3/LANL2DZ-ECP-6.311++G**) revealed similar affinities for both dppm and vdpp derivatives to coordinate potassium cations. Crystal structure analysis wasperformed for compounds 3a and 4.
PB American Chemical Society
YR 2022
FD 2022
LK https://hdl.handle.net/10347/39353
UL https://hdl.handle.net/10347/39353
LA eng
NO Lucio-Martínez, F., Reigosa, F., Bermúdez, B., Adams, H., Pereira, M. T., Vila, J. M. (2022). Cyclometallated Platinum(II) Complexes with Small Crown Ether Rings: Appropriate Choice of the Bridging Diphosphane to Coordinate Potassium Cations. "ACS Omega", vol. 7, nº 42, 37256-37263.
NO This work was made possible, thanks to the financial support received from the Xunta de Galica (Galicia, Spain) under the Grupos de Referencia Competitiva Programme (Project GRC2015/009). F.L.-M. and F.R. thank the Spanish Ministry of Education (grants FPU13/05014 and FPU15/07145). We wish to thank Professor Alberto Fernández (UDC, Spain) for helpful discussions concerning X-ray data
DS Minerva
RD 23 abr 2026