HETEROMETALLIC BOROLE COMPLEXES OF IRON AND GOLD

The first heterometallic borole complexes of Fe and Au have been prepa red by reaction of [HFe{eta(5)-(1-phenylborole)}(CO)(2)](-) (1) with [ AuCl(PPh3)] in CH2Cl2, and the crystal structure of [(OC)(2){eta(5)-(1 -phenylborole)}Fe{Au(PPh3)}(2)] (2) reveals an interesting orientation of the borole ligand. This complex reacts with [AuCl(PPh3)]/TIPF6 in CH2Cl2 to give the new cationic FeAu3 cluster OC)(2){eta(5)-(1-phenylb orole)}Fe{Au(PPh3)}(3)]PF6 (4) which has a tetrahedral metal core, as established by a wide angle X-ray scattering study.