Complexes of Ag1 with cationic ligands: bis[(pyridylmethyl)ammonio]silver(I) salts.

Bis[(2-pyridylmethyl)ammonio]silver(I) trinitrate, [Ag(C(6)H(9)N(2))(2)](NO(3))(3), (I), and bis[bis[(4-pyridylmethyl)ammonio]silver(I)] hexakis(perchlorate) dihydrate, [Ag(C(6)H(9)N(2))(2)](2)(ClO(4))(6).2H(2)O, (II), are rare examples of complexes with cationic ligands. In (I), the Ag(+) cation has a T-shaped [2+1] coordination involving the pyridine N atoms and a nitrate O atom, while in (II) there are three independent two-coordinate Ag complex cations (two with the Ag atoms on independent inversion centres) and disordered ClO(4)(-) ions. The crystal structures reveal the role of hydrogen bonding in stabilizing these complexes.