REACTIVITY OF NIDO-[2-(FE(ETA-C5H5))B5H10] WITH SOME TRANSITION-METALHYDRIDE COMPLEXES

The reaction of nido-[2-{Fe(eta-C5H5)}B5H10] with [Mo(PMe(2)Ph)(4)H-4] gave -closo-[1-{Fe(eta-C5H5)}-2-{Mo(PMe(2)Ph)(3)H}B5H7] which has bee n characterised by X-ray crystallography as well as by B-11 and H-1 NM R spectroscopy. The structure determination [monoclinic, space group P 2(1)/c, a = 15.586(5), b=11.523(4). c=19.186(4) Angstrom, beta=106.23( 2)degrees] reveals a capped-close geometry with one Fe-Mo-B face being capped by a boron atom and the other having a triply bridging hydroge n atom. The isostructural tungsten compound ped-closo-[1-{Fe(eta-C5H5) }-2-{W(PMe(3))(3)H}B5H7] was similarly prepared from [W(PMe(3))(3)H-6] and nido-[2-{Fe(eta-C5H5)}B5H10]. Reaction between [Re(PMe(3))(5)H] a nd nido-[2-{Fe(eta-C5H5)}B5H10] gave a mixture of nido-[2-{Re(PMe(3))( 3)}B(5)H10] and the salt [Re(PMe(3))(5)H-2](+) [nido-2-{Fe(eta-C5H5)}B (5)H9(])(-), a product of an acid-base reaction.