Silylcyclopentadienyl radicals

Compounds with a cyclopentadienyl-silicon cr-bond adopt a variety of bonding arrangements, which can be classified on the basis of the hybridization of the corresponding cyclopentadienyl carbon atom, as displayed in Scheme 1. In species of type 1, the silicon atom is bound to an sp3 -hybridized carbon atom, i.e. to an ally lie carbon within a cyclopentadiene unit. The silicon atom is bound to an sp2-hybridized carbon atom in species of type 2-6, including silylcyclopentadienyl radicals (2), ionic silylcyclopentadi-enide species (3), and silylcyclopentadienyl fragments bound in a /j5 -fashion to a metal centre (4). Species 5 represents the ionic resonance structure of a silafulvene, and structure 6 stands for the vinylic isomers of a cr-cyclopentadienylsilane (type 1), but these two types of compound are not examined in detail in this article. 

---

See also in sourсe #XX -- [ ]

See also in sourсe #XX -- [ ]

---