Title: Gd<sub>26</sub>Cluster Consisting of Distorted Cubane Cores: Synthesis, Structure and Heterogeneous Catalytic Epoxidation of Olefins
Abstract: Abstract A new Gd 26 cluster based 3D framework, {[Gd 26 (μ 6 ‐CO 3 ) 9 (NIC) 32 (μ 3 ‐OH) 26 ](NO 3 ) 2 · 3(H 2 O)} n ( 1 ) (NIC = nicotinato anion) has been prepared through hydrothermal synthesis and characterised by single‐crystal X‐ray diffraction. The Gd 26 clusters are formed by the combination of five distorted cubane cores attached to each other through six Gd 3+ ions. The Gd 26 clusters are then connected to each other by organic linkers forming a 3D framework. The dimensions of the spherical cluster shell including the organic ligands is around 2.32(4) nm. The compound catalyses the heterogeneous epoxidation of olefinic substrates including α, β‐unsaturated ketones.