Pyridyl- and pyrimidyl-phosphine-substituted [FeFe]-hydrogenase mimics: Synthesis, charaterization and properties
摘要:
Two tetranuclear iron-sulphur complexes {[(mu-pdt)Fe-2(CO)(5)](2)(PNP) (2) and [(mu-pdt)Fe-2(CO)(5)](2)(PNNP) (3)} and three dinuclear ones {[(mu-pdt)Fe-2(CO)(5)](PNP) (4), [(mu-pdt)Fe-2(CO)(5)](PNNP) (5) and [(mu-pdt) Fe-2(CO)(5)](PNN) (6)} were synthesized, using two new pyrimidyl-phosphine ligands PNNP [4,6-bis( diphenylphosphino) pyrimidine] and PNN (4-tertiary butyl-6-diphenylphosphino pyrimidine) together with the reported pyridyl-phosphine PNP [bis(diphenylphosphino) pyridine] as substituents to react with Fe-2(mu-pdt)(CO)(6). The molecular structures of 2, 3 and 6 were confirmed by single-crystal X-ray analyses, which show that all phosphine ligands occupy the apical positions, while the space group of 3 (P21/n) is different from that of 2 (P-1). Cyclic voltammograms reveal that pyrimidyl-phosphine substituted complexes 3, 5 and 6 present two reduction waves in CH2Cl2 solutions, while pyridylphosphine substituted 2 and 4 show only one. The DFT computational studies demonstrate that the contributions to the LUMO of 3 are comparable from the two Fe2S2 centres and ligated PNNP ligand, which is different from those of other [Fe2S2] mimics in this work. (C) 2014 Elsevier B. V. All rights reserved.
Synthesis of a tetratopic bisphosphine ligand derived from pyrimidine and its incorporation into gold and silver coordination polymers
作者:Roberta R. Rodrigues、Eric W. Reinheimer、Christopher L. Dorsey、Todd W. Hudnall
DOI:10.1016/j.ica.2022.121209
日期:2023.2
Herein we present the synthesis of a tetratopic bisphosphine ligand derivedfrom 4,6-disubstituted pyrimidine scaffold. This new ligand (2) was doubly alkylated using iodomethane to give bisphosphonium dication (3) as an iodide salt, and was also coordinated to both gold(I) chloride to give the metal complex (4) and to silver(I) triflate to give a coordination polymer (5), respectively. All compounds
Two tetranuclear iron-sulphur complexes [(mu-pdt)Fe-2(CO)(5)](2)(PNP) (2) and [(mu-pdt)Fe-2(CO)(5)](2)(PNNP) (3)} and three dinuclear ones [(mu-pdt)Fe-2(CO)(5)](PNP) (4), [(mu-pdt)Fe-2(CO)(5)](PNNP) (5) and [(mu-pdt) Fe-2(CO)(5)](PNN) (6)} were synthesized, using two new pyrimidyl-phosphine ligands PNNP [4,6-bis( diphenylphosphino) pyrimidine] and PNN (4-tertiary butyl-6-diphenylphosphino pyrimidine) together with the reported pyridyl-phosphine PNP [bis(diphenylphosphino) pyridine] as substituents to react with Fe-2(mu-pdt)(CO)(6). The molecular structures of 2, 3 and 6 were confirmed by single-crystal X-ray analyses, which show that all phosphine ligands occupy the apical positions, while the space group of 3 (P21/n) is different from that of 2 (P-1). Cyclic voltammograms reveal that pyrimidyl-phosphine substituted complexes 3, 5 and 6 present two reduction waves in CH2Cl2 solutions, while pyridylphosphine substituted 2 and 4 show only one. The DFT computational studies demonstrate that the contributions to the LUMO of 3 are comparable from the two Fe2S2 centres and ligated PNNP ligand, which is different from those of other [Fe2S2] mimics in this work. (C) 2014 Elsevier B. V. All rights reserved.
Synthesis and luminescence of binuclear lanthanide complexes with 4,6-bis(diphenylphosphino)pyrimidine dioxide as a bridging ligand
作者:Yuliya A. Bryleva、Karina M. Yzhikova、Alexander V. Artem'ev、Maria P. Davydova、Mariana I. Rakhmanova、Evgenia V. Polyakova、Ludmila A. Glinskaya、Denis G. Samsonenko