Niobium Alcoholate Clusters with an Octahedral Arrangement of Metal Atoms: [K(CH₃OH)₄]₂ [Nb₆(OCH₃)₁₈] and [Na([18]crown‐6)(C₂H₅OH)₂]₂ [Nb₆(OC₂H₅)₁₂(NCS)₆]

Abstract

Complete exchange: [M(6)X(12)] type cluster compounds with an octahedral M(6) metal atom arrangement, which is completely surrounded by alcoholato ligands, were unknown until now. The first representatives are prepared containing a [Nb(6)(OR)(12)](4+) unit (R = CH(3) or C(2)H(5)). They are accessible at elevated temperatures from strongly basic alcoholate solutions of [Nb(6)Cl(12)](2+)-containing precursors. C gray, H white, K turquoise, Nb blue, O red.