Synthesis and Characterization of Novel Lanthanocene Complexes with Dichalcogenolate o ‐Carboranyl Ligands

Reactions of [Cp 2 Ln(μ‐Cl)] 2 (Cp= η 5 ‐C 5 H 5 , Ln = Nd, Yb, Dy, Gd, Er) with an equivalent of [(THF) 3 LiE 2 C 2 Bi 0 H 10 Li. (THF)] 2 (E= S, Se) in THF afforded the dinuclear sandwich complexes of formula [CP 2 LnE 2 C 2 B 10 H 10 ] 2 [LI(THF) 4 ] 2 [E = S, Ln=Nd (1a), Yb (2a), Dy (3a), Gd (4a), Er (5a); E=Se, Ln=Nd (1b), Yb (2b), Dy (3b), Gd (4b), Er (5b)]. The molecular structures of complexes la, 2a and 2b were determined by the single crystal X‐ray structure analyses. Two lanthanide atoms are connected by a pair chalcogen (η 1 , η 2 ‐E 2 C 2 B 10 H 10 ) bridging ligands and the central Ln 2 E 2 four membered ring is not planar.