Complexation of the silaborate ligand
[MeSiB10H10]3- is
described for the first time. The syntheses of the
sandwich
anions
[(η5-C5Me5)M(MeSiB10H10)]-
(M = Co, Rh, Ir) are realized by reaction of the monodeprotonated
silaborate
with the respective pentamethylcyclopentadienyl transition metal
chloride. The reaction products are characterized
by mass spectrometry, elemental analyses, and multinuclear and
two-dimensional NMR spectroscopy. Because
of an unresolvable disorder in the solid state structure of
[NEt4][(η5-C5Me5)Rh(MeSiB10H10)],
the isobutyl-substituted derivative
[Ph3PMe][(η5-C5BuiMe4)Rh(MeSiB10H10)],
[Ph3PMe][4], was analyzed by an
X-ray structure
determination. The salt
[Ph3PMe][4]·THF,
C37H60OPSiB10Rh,
crystallizes in the triclinic space group P1̄ (No.
2)
with a = 9.838(4) Å, b = 11.312(3)
Å, c = 18.858(5) Å, α = 92.68(2)°, β
= 90.22(3)°, γ = 96.77(3)°, and
Z = 2.