[TeSe3]~(2-)as a tridentate ligand:syntheses and crystal structures of[PPh4][(CpM(mu_2-Se2))3(mu_3-O)(mu_3-TeSe3)](M=Zr,Hf)

摘要

The isostructural compounds[PPh4][(CpM(mu_2-Se2))3(mu_3-O)(mu_3-TeSe3)](M=Zr,Hf)have been synthesized by the reactions of Na2[TeSe3]with Cp2MCl2 in N,N-dimethylformarnide(DMF).The structure of the anion comprises a triangle of MCp groups bridged by mu_2-Se2 groups and capped by a mu_3-TeSe3 and a mu_3-O group.These compounds represent the first examples of the mu_3-TeSe_3~(2-)ligand capping a metal system.