A novel example of self-assembly in lanthanide chemistry: synthesis and molecular structure of [Na(EtOH)6][Y9(μ4-O)2(μ3-OH)8{μ-η2-MeC(O)CHC(O)OEt}8{η2-MeC(O)CHC(O)OEt}8] †

Rare‐Earth Metal Oxo/Hydroxo Clusters – Synthesis, Structures, and Applications

“…The resulting nonanuclear cluster compounds are stabilized by oxo-or hydroxo groups in the inner coordination sphere and by various ligands in the outer coordination sphere (Figure 2). Examples with alkoxides, [39] -diketonates, [7,52,57,58] and pyridine derivatives [59] are known in the literature. Hydrogen atoms are omitted for clarity.…”

Gd26Cluster Consisting of Distorted Cubane Cores: Synthesis, Structure and Heterogeneous Catalytic Epoxidation of Olefins

“…have been synthesised and characterised although reports of lanthanide clusters are limited. Controlled hydrolysis of the metal ions led to high-nuclearity lanthanide clusters producing tetra-, [13] penta-, [14] hexa-, [15] hepta-, [16] octa-, [17] nona-, [18] deca-, [19] dodeca-, [20] tetradeca-, [21] pentadecanuclear [22] and hexatriacontanuclear [23] lanthanide clusters. In this context, oxo, hydroxo and fluorido bridged lanthanide clusters are worthy of note.…”

Lanthanide molecular oxohydroxides: Synthesis and characterisation of [Y4(μ4-O)(μ-OEt)2(μ,η2-AAA)2(η2-AAA)3]2(μ3-OH)4(μ3-OEt)2 (HAAA=allylacetatoacetate)

“…We have previously shown that the reaction between yttrium nitrate and the sodium salt of allylacetatoacetate MeCOCH 2 COOCH 2 CH@CH 2 (HAAA) afforded a nonanuclear oxohydroxide species [Y 9 O 2 (OH) 8 (l,g 2 -AAA) 8 (g 2 -AAA) 8 ] À but its moderate solubility [8] led us to consider other yttrium species as alternatives for doping. b-Diketoesters such as 2-(methacryloyloxy)ethyl acetatoacetate (HAAEMA) and especially HAAA were found to modify only slightly the properties of the initial, non-doped microcellular materials [3b,9] and were thus selected as possible candidates for access to yttrium precursors.…”