2,6-Bis(diphenylphosphinosulfide)pyridine (L) as a facial terdentate ligand: synthesis and characterisation of the tricarbonylrhenium(I) complexes fac-[Re(CO)3L]+ [Re2(CO)6(μ-X)3]− (X=Cl, Br or I) and fac-[Re(CO)3L]+ [SbF6]−
摘要:
The halogenopentacarbonylrhenium(I) compounds react with 2,6-bis(diphenylphosphinosulfide) pyridine (L) under mild conditions to yield ionic complexes of general formulae, fac-[Re(CO)(3)L](+) [Re(2)(CO)(6) (mu-X)(3)](-) (X=Cl, Br or I), in which the ligand adopts a facial terdentate bonding mode. A synthesis of [Re(CO)(3)L](+) [SbF(6)](-) was carried out to establish the presence of the cation, fac-[Re(CO)(3)L](+), in the complexes. The character of the anions was confirmed by negative ion MALDI-TOF mass spectrometry. The cation is fluxional; the P-phenyl rings oriented towards the metal moiety exhibit restricted rotation at low temperature. The free energy of activation, Delta G(+), for hindered rotation is ca. 47 kJ mol(-1) for all complexes. Solid-state (31)P NMR data are reported for the free ligand and for the complexes, [Re(CO)(3)L][SbF(6)] and [Re(Co)(3)L][Re(2)(CO)(6)(mu-X)(3)] (X=Cl, Br or I). (C) 1998 Elsevier Science Ltd. All rights reserved.
N,S-containing soft ligands for extractive separation of f-metals: synthesis and unexpected inverse selectivity
作者:Gladis G. Zakirova、Petr I. Matveev、Dmitrii Yu. Mladentsev、Mariia V. Evsiunina、Viktor A. Tafeenko、Nataliya E. Borisova
DOI:10.1016/j.mencom.2019.07.037
日期:2019.7
A number of heterocycle-based bis(phosphine sulfides) have been synthesized from the corresponding phosphine oxides using phosphorus(v) sulfide in good to excellent yields, for one representative compound the molecularstructure has been determined by single crystal X-ray diffraction. The compounds obtained were tested as extractants for f-metals both in nitric acid and ammonium nitrate media, distribution
The synthesis and characterization of three oxidized derivatives of bis(diphenylphosphino)pyridine and their Sn(IV) complexes
作者:Richard Sevcik、Marek Necas、Josef Novosad
DOI:10.1016/s0277-5387(03)00291-2
日期:2003.6
The synthesis and spectroscopic characterization of three chalcogenophosphoryl ligands derived from pyridine is reported. The synthesis was based on the oxidation of C5H3N(PPh2)(2) by elementalsulfur and selenium, and hydrogen peroxide. As a part of our study on the coordination chemistry of the ligands, three new Sn(IV) complex cations of the general formula [Ph2P(E)-C5H3N-P(E)Ph-2]SnCl3}(+) (E