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