International Union of Crystallography, Acta Crystallographica Section E: Structure Reports Online, 3(64), p. o556-o556, 2008
DOI: 10.1107/s1600536808003401
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The title compound, C7H15N3P+·BF4 − or [PTA-Me][BF4], is the N-methylated derivative of the well known water-soluble aminophosphine 1,3,5-triaza-7-phosphaadamantane (PTA). The asymmetric unit consists of a cage-like cation [PTA-Me]+ and a disordered tetrafluoroborate anion; two F atoms are disordered equally over two sites. A network of weak intermolecular C—H⋯F hydrogen bonds results in a three-dimensional supramolecular assembly.