High nuclearity carbido carbonyl clusters of rhenium. Synthesis, X-ray crystal structure, and 13C n.m.r. study of the anion [Re8C(CO)24]2–

Abstract

The novel high nuclearity carbido carbonyl anion [Re₈C(CO)₂₄]^2–, isolated from the pyrolysis of [ReH₂(CO)₄]^– in n-tetradecane, has the, metal atoms arranged as an octaheron capped on two opposite faces as shown by an X-ray crystal structure determination; ¹³C n.m.r. analysis has confirmed the nature of the interstitial atom and shown that the solid-state structure of the anion is maintained in solution.