Tetra-aqua-dodekakis-μ2-chlorido-di-iodido- octa-hedro-hexa-niobium(12 Nb- Nb) tetra-hydro-furan octa-solvate

Abstract

The title compound, [Nb₆Cl₁₂I₂(H₂O)₄]·8THF (THF is tetra-hydro-furan, C₄H₈O), comprises an uncharged niobium cluster unit surrounded by THF solvent mol-ecules. The edges of the {Nb₆} octa-hedron are μ ₂-coordinated by twelve chlorido ligands. Four in-plane (equatorial plane) aqua ligands and two iodido ligands coordinating above and below the plane are bound at the corners of the {Nb₆} atomic octa-hedron. O-H⋯O hydrogen bonds are formed between the aqua ligands and the THF solvent mol-ecules; one THF molecule is disordered over two positions with the major component having a site occupancy of 0.64 (2).

Keywords: chloride; crystal structure; metal atom cluster; niobium; structure determination.