Bis{μ-2-[(pyrimidin-2-yl)aminomethyl]phenolato}-κ2 N 1:O;κ2 O:N 1-bis({2-[(pyrimidin-2-yl-κN)aminomethyl]phenol}silver(I)) dihydrate

The AgI atom in the title centrosymmetric dinuclear compound, [Ag2(C11H10N3O)2(C11H11N3O)2]·2H2O, shows a T-shaped coordination arising from bonding to the N atom of a neutral 2-[(pyrimidin-2-yl)aminomethyl]phenol ligand, the N atom of the 2-[(pyrimidin-2-yl)aminomethyl]phenolate anion [N—Ag—N = 171.8 (1)°] and the terminal O atom of the other anion [Ag—O = 2.606 (3) Å]. A pair of 2-[(pyrimidin-2-yl)aminomethyl]phenolate anions link the two AgI atoms to form the dinuclear compound. In the crystal, adjacent dinuclear molecules are linked to the lattice water molecules, generating an O—H⋯O- and N—H⋯O-connected three-dimensional network. In the crystal, the hydroxy H atom is disordered over two positions in a 1:1 ratio; one half-occupancy H atom is connected to one hydroxy group, whereas the other half-occupancy H atom is connected to another hydroxy group.

The Ag I atom in the title centrosymmetric dinuclear compound, [Ag 2 (C 11  In the crystal, adjacent dinuclear molecules are linked to the lattice water molecules, generating an O-HÁ Á ÁOand N-HÁ Á ÁOconnected three-dimensional network. In the crystal, the hydroxy H atom is disordered over two positions in a 1:1 ratio; one half-occupancy H atom is connected to one hydroxy group, whereas the other half-occupancy H atom is connected to another hydroxy group.

Experimental
An acetonitrile solution (10 ml) of silver nitrate (1 mmol) was added to a methanol solution (5 ml) of 2-[(pyrimidin-2yl)aminomethyl]phenol (1 mmol) and potassium hydroxide (0.5 mmol). The solution was filtered and then side aside, away from light, for the growth of crystals. Colorless crystals were obtained after several days.

Refinement
Hydrogen atoms were placed in calculated positions (C-H 0.93-0.97 Å) and were included in the refinement in the riding model approximation, with U(H) set to 1.2U(C). The amino and hydroxy/water H atoms were located in a difference Fouier map, and were refined with distance restraints of N-H 0.88±0.01, O-H 0.84±0.01 and H···H 1.37±0.01 Å. Their temperature factors were refined.
The hydroxy H-atom is disordered over two positions in a 1:1 ratio; one half-occupancy H-atom is connected to O1 whereas the other half-occupancy atom is connected to O2.
The final difference Fouier map had a peak at 0.83 Å from Ag1 and a hole at 0.84 Å from this atom.