Butyl­ammonium tetra­hydroxypenta­borate.

The title compound, butyl­ammonium 1,3,5,7,9,11-hexa­oxa-2,4,6,8,10-penta­boraspiro­[5.5]undecane-2,4,8,10-tetraol(1−), C4H12N+·B5O6(OH)4−, was synthesized under mild solvothermal conditions in the presence of 1-butyl­amine acting as a template. The structure consists of penta­borate [B5O6(OH)4]− anions connected through O—H⋯O hydrogen bonds into a three-dimensional framework, with channels running along one direction. The [C4H12N]+ cations lie in the channels, inter­acting with the framework through N—H⋯O hydrogen bonds. [ABSTRACT FROM AUTHOR]