Be[B2(SO4)4] – A Borosulfate Exhibiting Ino‐ and Phyllosilicate Analogue Topology. Issue 11 (22nd February 2022) - Sutorius, Stefan
Abstract: Borosulfates are a constantly expanding class of silicate analogue compounds. The anionic substructures are composed of vertex‐connected (BO4 )‐ and (SO4 )‐tetrahedra and feature topologies of monomeric, oligomeric, and polymeric anions. The latter resemble typical motifs of ino ‐, phyllo ‐ and tecto silicates but none of the hitherto known borosulfates exhibits two different anion topologies within one structure. However, this is very rare even for the homopolyanionic silicates. Be[B2 (SO4 )4 ] is the first borosulfate featuring anionic chains and layers within one structure and both substructures are interconnected by (BeO4 )‐tetrahedra. DFT calculations complement the experimental studies and help to describe the bonding situation of the Be−O bonds. Abstract : Two in one : Be[B2 (SO4 )4 ] was obtained via a solvothermal reaction under harsh conditions either from elemental beryllium or beryllium sulfate. The anionic substructure of the borosulfate exhibits an elusive arrangement of two different anionic substructures. The ino ‐ and phyllo silicate analogue anions are charge compensated by beryllium cations. DFT calculations help to understand the bonding situation.