HYDROGEN-BONDED SELF-ASSEMBLY OF TRIS(2-AMMONIOETHYL)AMINE MOLYBDATE HYDRATE, 3)(3)](3-DOT-6[MOO4](2-)CENTER-DOT-6H(2)O()CENTER)

The title compound consists of a three-dimensional network of cations, anions and water molecules linked through hydrogen bonding in which a ll available hydrogen-bond donors are utilized. In four of the tetrahe dral [MoO4](2-) anions, one O atom is hydrogen bonded with the three p rotonated groups of a cation. The other O atoms in these four [MoO4](2 -) anions and those of the remaining two [MoO4](2-) anions are all inv olved as accepters in either O-H...O [2.713 (4)-2.865 (4) Angstrom] or N-H...O [2.656 (5)-2.989 (4) Angstrom] hydrogen bonds with water mole cules or adjacent cations. The mean Mo-O distance increases with the n umber of hydrogen bonds for which the O atom acts as an acceptor [1.72 8 (10), 1.758 (6) and 1.774 (8) Angstrom for one, two and three hydrog en bonds, respectively].