A high-nuclearity Ni–Sb carbonyl cluster displaying unprecedented metal stereochemistries: synthesis and X-ray structure of [NEt4]6[Ni31Sb4(CO)40 ]·2 Me2CO

Abstract

The mild oxidation of [NEt₄]₂[Ni₁₅Sb(CO)₂₄] in acetone solution with SbCl₃ in a ca. 3∶1 molar ratio leads to the new high-nuclearity [Ni₃₁Sb₄(CO)₄₀]⁶⁻ hexaanion, which displays two interstitial Ni and four semi-interstitial Sb atoms with unprecedented stereochemistries.