Sünkel, Karlheinz; Hofmann, Julian
Coordination chemistry of perhalogenated cyclopentadienes and alkynes. 8. Pentakis(dimethylsilyl)cymantrene.
In: Organometallics, Vol. 11: pp. 3923-3925
Starting from [q5-C5Br5]M n(CO),, the first
r-complex of a cyclopentadienyl ligand with five silyl
substituents, [q 5-C5(SiMe2H)5M] n(CO),, was prepared by
a series of halogen-lithium exchange reactions, followed
by silylation with SiMe2HCI. The crystal structure determination of this compound shows a highly symmetrical
"paddle wheel" orientation of the five silyl groups around
the cyclopentadienyl ring.