Ytterbium(II) - group 6, 7 transition metal carbonyl complexes systematic synthesis and structural characterization /

by 1976- Poplaukhin, Pavel V.

New carbonyl complexes of divalent ytterbium and transition metals of groups 6, 7 of the periodic table have been prepared. The syntheses were carried out in systematic fashion with the aim of establishing general procedures suitable for preparation of a range of compounds of this type. The products obtained were characterized by means of IR spectroscopy and X-ray single crystal diffraction. Nineteen X-ray structures are reported herein, of which only one has been published before. The compounds studied can be divided into two major groups: the solvent-separated ion pairs, where the YbII cation is surrounded with solvent molecules acting as ligands, preventing interaction with the metal carbonylate anion; and complexes with the bridging carbonyl ligands (isocarbonyl ligands), where the cation and the anion are bound together through a –CO- link. New instances of condensation of the solvent-separated ion pairs into the isocarbonyl complexes have been discovered, and the mechanism for such transformation was proposed. The novel [Hg(W(CO)5)2]2- anion was discovered and characterized by X-ray single crystal diffraction. Its reactivity was briefly investigated. ii ???????? ???? ?????????