The synthesis, characterization and X-ray crystal structures of the fac-cis and mer-trans isomers of Re(NEt)Cl-3(PMe3)(2)

摘要

The fac-cis and mer-trans isomers of Re(NEt)Cl-3(PMe3)(2) (1 and 2, respectively) have been prepared and their structures established by X-ray crystallography. This is the first instance where both isomers of a particular complex of the type Re(NR)X-3(PR3')(2) (R = alkly or aryl; X = halide; PR3' = tertiary phosphine) have been structurally characterized, and the first examples where an alkylimido ligand is present in combination with triakylphosphine ligands. The Re-N bond distances in 1 and 2 are 1.68(1) and 1.68(2) A, respectively, and the Re = N-C unit is essentially linear (177(1)degrees for 1 and 177(2)degrees for 2). (C) 1998 Elsevier Science S.A. All rights reserved. [References: 19]