Metalated Oligosilanylstibines

The
reaction of a cyclic disilylated bromostibine with magnesium
yields a rare example of a magnesium stibide that can be silylated
with trimethylchlorosilane. Reaction of the thus-obtained trisilylated
stibine with potassium tert-butoxide gives a potassium
stibide in a clean reaction. Attempts to obtain an antimony-containing
oligosilanide did not lead to the expected compound but to another
potassium stibide, which presumably forms from the initially formed
silanide by a 1,2-silyl shift. The synthetic potential of the obtained
stibides to serve as building blocks could be shown by the preparation
of stibylated zircono- and hafnocenes.