Effect of La on the Formation of Endohedral Zintl Clusters Featuring In/Bi Shells.

Investigating the interactions of f-block metal ions with p-block polyanions in multinary cluster compounds is becoming increasingly attractive but remains a challenge in terms of both the synthetic approach and the control of the structures that are formed during the syntheses. So far, two types of reactions were dominant for the formation of corresponding clusters: the reaction of binary anions of p-block elements in 1,2-diamino-ethane () solutions or the reaction of organobismuth compounds with corresponding f-block metal complexes in THF. Herein, we report the synthesis of [La@InBi] () and its doubly μ-Bi-bridged analogue in the doubly [K(crypt-222)]-coordinated {[K(crypt-222)][La@InBi](μ-Bi)[La@InBi]} () as their [K(crypt-222)] salts [K(crypt-222)] and [K(crypt-222)], respectively, achieved by reactions of [InMes] and [La(CMeH)] (Mes = mesityl, CMeH = tetramethylcyclopentadienyl) with KGaBi/crypt-222 (crypt-222 = 4,7,13,16,21,24-hexaoxa-1,10-diazabicyclo[8.8.8]hexacosane) in . In the absence of [La(CMeH)], the otherwise unchanged reactions afford the anions [Bi(InMes)(InMes)] () and [MesIn-InMes] () instead, which can be isolated as their [K(crypt-222)] salts [K(crypt-222)] and [K(crypt-222)]·tol (tol = toluene), respectively. The {Bi} fragment observed in anion is assumed to be one of the key intermediates not only toward the formation of and but also on the way to more general bismuth rich compounds.