Formation of donor–acceptor Fe(0)–Hg(II) bond in separation and stabilization of optically active iron(0) phosphine complexes. Absolute configuration of (+)-(R)-(CO)4Fe(μ-EtPhPpy)HgCl2
摘要:
The chiral phosphine ligand 2-(ethylphenylphosphino)pyridine (EtPhPpy, R/S mixture) reacts with Fe(CO)(5) to give racemic (+/-)-Fe(CO)(4)(EtPhPpy-P), which undergoes an addition reaction with HgCl2 to afford the optically active binuclear Fe(0)-Hg(II) complexes (+)-(R)-(CO)(4)Fe(mu-EtPhPpy)HgCl2 and (-)-(S)-(CO)(4)Fe(mu-EtPhPpy)HgCl2, which can be separated manually in crystalline form. The absolute configuration of (+)-(R)-(CO)(4)Fe(mu-EtPhPpy)HgCl2 has been determined by single crystal X-ray analysis. (C) 1999 Elsevier Science S.A. All rights reserved.