Reactions of Phenylsilanes with Iron Nonacarbonyl

1996-05-28T00:00:00Z (GMT) by Richard S. Simons Claire A. Tessier
Reaction of equimolar amounts of Fe2(CO)9 and SiPhH3 yields the triply bridged diiron complex [(OC)3Fe]2(μ-SiPhH)2(μ-CO) (1a). The analogous reaction of Fe2(CO)9 and SiPh2H2 provides the singly bridged diiron complex [(OC)4Fe−Fe(CO)3(SiHPh2)](μ-η2-H-SiPh2) (4). When 4 is photolyzed for 12 h, the complex [(OC)3Fe]2(μ-η2-H-SiPh2)2 (5) is obtained. Both 4 and 5 exhibit agostic Fe−H−Si interactions. Reaction of Fe2(CO)9 or Fe(CO)5 with the disiloxane Ph2HSi−O−SiHPh2 gives the singly bridged diiron complex [(OC)4Fe]2(μ-η2-Ph2Si−O−SiPh2) (6). All compounds have been characterized by 1H, 13C, and 29Si NMR and IR spectroscopy. Compounds 46 have been characterized by X-ray crystallography.