title: 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.
authors.affiliation: Anorganische Chemie/Festkörperchemie, Universität Rostock, Institut für Chemie, Albert-Einstein-Strasse 3a, 18059 Rostock, Germany.
authors.forename: Anke
authors.initials: A
authors.lastname: Flemming
authors.forename: Martin
authors.initials: M
authors.lastname: Köckerling