An aluminoborate cluster [AlB12O14(OH)12]: Synthesis and structure of [C5H6N][AlB12O14(OH)12]

A new aluminoborate, [C5H6N][AlB12O14(OH)12], has been hydrothermally synthesized at 200 °C. The single-crystal diffraction study reveals that it crystallizes in space group C2/c. It consists of aluminoborate clusters [AlB12O14(OH)12]− and counterions [C5H6N]+. The aluminoborate cluster contains an Al(OH)6 octahedron as a core that is capped by two raft-like polyborate units [B6O7(OH)6]. These clusters are further interlinked by extensive hydrogen bonding to form a three-dimensional (3D) network, containing large channels along the b-axis, in which the [C5H6N]+ cations are located.