Synthesis and characterization of the bromide and hydride derivatives of rhenium(I) 1,2-bis(diphenylphosphinite)ethane complexes
1999; Elsevier BV; Volume: 18; Issue: 10 Linguagem: Inglês
10.1016/s0277-5387(99)00002-9
ISSN1873-3719
AutoresS. Bolaño, Jorge Bravo, Rosa Carballo, Soledad García‐Fontán, Ulrich Abram, E.M. Vázquez-López,
Tópico(s)Radiopharmaceutical Chemistry and Applications
ResumoThe 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.
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