Melaminium benzoate dihydrate

A new melaminium salt, 2,4,6- triamino- 1,3,5- triazin- 1- ium benzoate dihydrate, C3H7N6 (+) . C6H5COO- . 2H(2)O, consists of singly protonated melaminium residues, benzoate anions and water molecules. The components are linked by hydrogen bonds into a three- dimensional framework structure. The melaminium residues are connected by two pairs of N - H ... N hydrogen bonds into chains. The benzoate anion acts as acceptor for two hydrogen bonds from melaminium residues and for three hydrogen bonds from the two water molecules, which themselves form an O - H ... O bonded dimeric structure. The extended structure is a double layer, with a distance of 3.38 ( 1) Angstrom between the triazine rings, indicating pi - pi interactions.