Pure rac ansa-lanthanocene alkyl complexes have been directly isolated and structurally characterized; they feature a rigid unsymmetric structure with the alkyl group paralleling the bridged indenyl planes.
纯rac ansa-lanthanocene烷基复合物已被直接分离出来,并具有结构特征;它们具有刚性非对称结构,烷基与桥接的
茚基平面平行。