Scandium complexes mono compounds

The only other class of compound that contains a lanthanide(III) ion and one [8]annulene ligand is the "mixed sandwich" complex, the [8]annulenelanthanate(III) cyclopentadienides. s This class of complexes can be made either by the addition of cyclopentadienide to the mono-[8]annulenelanthanide chlorides or by the addition of [8]annulene dianion to cyclopentadienyllanthanatedll) dichloride. The yttrium a and scandium members of this class have also been reported. 

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