227932-51-6Relevant articles and documents
Synthesis and characterization of the bromide and hydride derivatives of rhenium(I) 1,2-bis(diphenylphosphinite)ethane complexes
Bolano, Sandra,Bravo, Jorge,Carballo, Rosa,Garcia-Fontan, Soledad,Abram, Ulrich,Vazquez-Lopez, Ezequiel M.
, p. 1431 - 1436 (1999)
The reaction of [ReX(CO)5] (X=Br, H) with the bidentate phosphinite ligand 1,2-bis(diphenylphosphinite)ethane (L-L), synthesized by reaction of PPh2Cl and ethylene glycol in a 2:1 ratio in the presence of NEt3, at room temperature, affords the mononuclear rhenium(I) complexes fac-[ReBr(CO)3(L-L)] (1) and fac-[ReH(CO)3(L-L)] (2). The coordination geometry of the complexes was established by diffraction studies and confirmed by spectroscopic data of both complexes. Compound 1 crystallizes in the P21/c (No. 14) monoclinic space group while the hydride complex does so in P21 (No. 4). The coordination polyhedron around the rhenium atom in both cases is a slightly distorted octahedron with three carbonyl groups in facial positions. The link of the bidentate ligand to the metal atom leads to a seven-membered ReP2O2C2 ring, adopting a conformation better described as a twisted chair.
