HPLC of Formula: 1663-45-2. The reaction of aromatic heterocyclic molecules with protons is called protonation. Aromatic heterocycles are more basic than benzene due to the participation of heteroatoms. Compound: 1,2-Bis(diphenylphosphino)ethane, is researched, Molecular C26H24P2, CAS is 1663-45-2, about Fully solvated, monomeric Re(II) complexes: insights into the chemistry of [Re(NCCH3)6]2+. Author is Bolliger, Robin; Meola, Giuseppe; Braband, Henrik; Blacque, Olivier; Siebenmann, Lukas; Nadeem, Qaisar; Alberto, Roger.
The oxidation of [Re(η6-C10H8)2]+ with Ag(I) in MeCN yields [Re(NCCH3)6]2+. This fully solvated ReII compound was characterized by spectroscopic methods and x-ray structure analyses. [Re(NCCH3)6]2+ acts as a precursor complex for a variety of substitution reactions. Treatment with monodentate tri-Ph phosphine (PPh3) and bidentate 1,2-bis(diphenylphosphino)ethane (dppe) yields the ReI complexes [trans-Re(PPh3)2(NCCH3)4]2+ and [trans-Re(dppe)2(NCCH3)2]+, resp. [Trans-Re(dppe)2(NCCH3)2]+ is oxidized under mild conditions by AgI to its ReII analog [trans-Re(dppe)2(NCCH3)2]2+. Reactions of [Re(NCCH3)6]2+ with a halide mixture consisting of NaX and AgX (X = Cl, I) gave the corresponding ReIII complexes [trans-ReX2(NCCH3)4]+. [Trans-ReBr2(NCCH3)4]+ can be obtained directly from [Re(η6-C10H8)2]+ by oxidation with FeBr3 in MeCN. The title compound is thus a convenient starting material for ReII and ReIII complexes by simple solvent exchange, which are otherwise difficult to access.
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Reference:
Chiral nitrogen ligands in late transition metal-catalysed asymmetric synthesis—I. Addressing the problem of ligand lability in rhodium-catalysed hydrosilations,
Nitrogen-Containing Ligands for Asymmetric Homogeneous and Heterogeneous Catalysis