Synthesis and characterization of the new tin borate SnB8O11(OH)4

Abstract

AbstractA new tin(II) borate with the composition SnB8O11(OH)4was synthesized by a simple hydrothermal process. It crystallizes in the centrosymmetric monoclinic space groupP21/n(no. 14) with the lattice parametersa=790.1(1),b=1402.2(2),c=994.8(1) pm, andβ=90.40(5)° (Z=4). The new compound SnB8O11(OH)4is isotypic to PbB8O11(OH)4and isostructural to BaB8O11(OH)4. The borate layers are built up from fundamental building blocks (FBBs) with the composition [B8O11(OH)4]2−. Four of these FBBs form a nine-membered ring wherein the Sn2+cations are located. These boron-oxygen layers are further connected by O–H···O hydrogen bond interactions. The characterization of SnB8O11(OH)4is based on single-crystal X-ray diffraction data, vibrational spectroscopy, DFT calculations, and thermoanalytical investigations including high temperature powder XRD.