Hydrogen‐Bonded Self‐Assembly of Tris(2‐ammonioethyl)amine Molybdate Hydrate, 4[N(CH2CH2NH3)3]3+.6[MoO4]2−.6H2O

The title compound consists of a three-dimensional network of cations, anions and water molecules linked through hydrogen bonding in which all available hydrogen-bond donors are utilized. In four of the tetrahedral [MoO 4 ] 2- anions, one O atom is hydrogen bonded with the three protonated groups of a cation. The other O atoms in these four [MoO 4 ] 2- anions and those of the remaining two [MoO 4 ] 2- anions are all involved as acceptors in either O-H...O [2.713 (4)-2.865 (4) A] or N-H...O [2.656 (5)-2.989 (4) A] hydrogen bonds with water molecules or adjacent cations. The mean Mo-O distance increases with the number of hydrogen bonds for which the O atom acts as an acceptor [1.728 (10), 1.758 (6) and 1.774 (8) A for one, two and three hydrogen bonds, respectively]