Although copper does not form a metallocene, half-sandwich complexes can be produced.
3.
Arteaga M�ller et al . utilize the isolobal analogy to relate imido half-sandwich complexes with isoelectronic dicyclopentadienyl complexes.
4.
The decamethyl analog, Cp * 2 Pb, and the half-sandwich complexes, Cp * PbBF 4 and Cp * PbCl, are known as well.
5.
Sandwich complexes are even known containing purely inorganic ligands, such as Fe ( C 5 Me 5 ) ( P 5 ) and [ ( P 5 ) 2 Ti ] 2 ".
6.
The formation of the half-sandwich complex is believed to occur via hydrocarbyl-bridged radical reaction involving the combination of two ( ? 5-C 5 Me 5 ) Zn & bull; radicals.
7.
Crystalline solvent-free NaCp, which is rarely encountered, is a " polydecker " sandwich complex, consisting of an infinite chain of alternating Na + centers sandwiched between ? 5 : ? 5-C 5 H 5 ligands.
8.
Above-159 �C, the solid changes color from amber to pink and the polymer converts to the structure of a normal sandwich complex, i . e ., the molecule Mn ( ? 5-C 5 H 5 ) 2.
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