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Dodecaborate
Dodecaborate (or ''closo''-dodecaborate, or dodecahydro-''closo''-dodecaborate) is a ionic molecule containing a symmetrical cluster of boron and hydrogen atoms with the molecular formula B12H122−. Formally it can be derived from a hypothetical borane called dodecaborane B12H14. It is isoelectronic in structure with the dicarborane with formula B10C2H12. The dodecaborate has been of great theoretical interest to the chemistry community.
== Structure ==
The ()2− anion's B12 core is a regular icosahedron. The ()2− as a whole also has icosahedral molecular symmetry, and it belongs to the molecular point group Ih. Its icosahedral shape is consistent with the classification of this cage as "closo" in polyhedral skeletal electron pair theory.〔Miessler, G; Fischer, P.; Tarr, D. (2014) Inorganic Chemistry. Edition 5. Pearson Education, Inc, Upper Saddle River, p 601.〕 (B12H14 - 2H+ → (B12H122-.)〔Kiremire E. M. (2014). Numerical Sequence of Borane Series. Orient J Chem ;30(3).〕
The molecular weight = 143.6 g/mol and and pKa = 28.〔Lauri Lipping, Ivo Leito, Ivar Koppel, Ingo Krossing, Daniel Himmel, and Ilmar A. Koppel (2015). Superacidity of closo-Dodecaborate-Based Brønsted Acids: a DFT Study. The Journal of Physical Chemistry A. 119 (4), 735-743〕
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