Abstract
The synthesis and characterization of a C2 (ethane) linked bis(trimethylammonium) pentaborate salt, [Me3NCH2CH2NMe3][B5O6(OH)4]2 (1), is reported . Compound 1 has been characterized by 1H, Citation11B, and Citation13C NMR Spectroscopy, IR spectroscopy, thermal (TGA/DSC) analysis, and single-crystal X-ray diffraction. There are two independent crystallographic pentaborate(1-) anions in the solid-state structure and these link by H-bonds at β-sites into a centrosymmetric tetrameric chain. These chains are crossed-linked by R22(8) H-bond motifs to α-sites of neighboring pentaborate tetrameric units. The [Me3NCH2CH2NMe3]2+ cations are located between these tetrameric pentaborate(1-) units.
Graphical Abstract
![](/cms/asset/3e1887ef-25d0-47a7-bc33-614ae5ebd0d5/gpss_a_1631308_uf0001_c.jpg)
Acknowledgements
We thank the EPSRC for the NCS X-ray crystallographic service (Southampton).