Lanthanidocene chlorides

The X-ray structural characterization of a series of mono-, di-, and poly-lanthanidocene aluminohydride and alane complexes by B.M. Bulychev and G.L. Soloveichik revealed a variety of coordination modes of the [A1H4] , [AIH3] and [A1H2]+ moieties [273-281]. Routinely, these complexes were synthesized by the reaction of a lanthanidocene chloride with LiAlH4 or A1H3. The nuclearity and All x coordination mode depend on the presence of additional Lewis bases, such as THF, diethyl ether, or triethylamine (Chart 7). Diene polymerization based on lanthanidocene aluminohydrides has not been reported. 

The chiral silicon-bridged lanthanidocene chlorides [MeRSi(C5H4)(C5Me4)LnCl]2 (R = Et, Ph Ln = Y, La, Sm, Lu) were made according to Scheme 159 from the disodium salts Na2[MeRSi(CsH4)(C5Me4)] (R = Et, Ph) and the corresponding lanthanide trichlorides in TFIF. 

Alkyl] [chloride] interchange reactions in half-lanthanidocene chem... 

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