| Abstract |
The title compound, C7H15N3OP+center dot I-3(-), is a derivative of the well known water-soluble aminophosphine 1,3,5-triaza-7-phosphaadamantane (PTA). The crystal structure is composed of a cage-like 1-methyl-1-azonia-3,5-diaza-7-phosphatricyclo[3.3.1.1] decane 7-oxide cation and a triiodide anion. The N-methylation of the PTA cage results in a slight elongation of the corresponding C-N bonds, while the oxidation of the P atom leads to a slight shortening of the C-P bonds in comparison with those of PTA. In general, most of the bonding parameters are comparable with those reported for related compounds bearing the PTA core. Two intermolecular C-H center dot center dot center dot O hydrogen bonds between methylene groups and the P=O group are responsible for the linkage of neighbouring cations into linear one-dimensional hydrogen-bonded chains. |
