{4-[(Diphenylphosphino)methylamino]pyridinium-κP}bis(nitrato-κO)silver(I)

In the title mononuclear complex, [Ag(C18H18N2P)(NO3)2], the metal centre is coordinated in a slightly distorted trigonal–planar geometry by the P atom of the phosphine ligand and the O atoms of the two monodentate nitrate anions. In the crystal structure, complex molecules are connected by intermolecular N—H⋯O hydrogen bonds, forming chains running parallel to the b axis.

In the title mononuclear complex, [Ag(C 18 H 18 N 2 P)(NO 3 ) 2 ], the metal centre is coordinated in a slightly distorted trigonalplanar geometry by the P atom of the phosphine ligand and the O atoms of the two monodentate nitrate anions. In the crystal structure, complex molecules are connected by intermolecular N-HÁ Á ÁO hydrogen bonds, forming chains running parallel to the b axis.
In the title complex ( Fig. 1), the silver(I) metal centre adopts a slightly distorted trigonal-planar geometry provided by the P atom of the phosphine ligand and by the O atoms of two monodentate nitrate anions. The metal is displaced by 0.0629 (3) Å from the plane of the donor atoms. In the crystal structure, the complex molecules are linked by intermolecular N-H···O hydrogen bonds (Table 1, Fig. 2) to form chains running parallel to the b axis.

S2. Experimental
Silver nitrate (0.0168 g, 1 mmol) was dissolved in CH 3 CN (2 ml) and a solution of N-diphenylphosphinomethyl-4-aminopyridinium (0.0292 g, 1 mmol) in CH 3 OH (4 ml) was added with stirring for three hours at room temperature. Subsequent diethyl ether diffusion into the solution afforded colourless crystal of the title compound suitable for X-ray analysis.

Crystal data
[Ag (C 18   Refinement. Refinement of F 2 against ALL reflections. The weighted R-factor wR and goodness of fit S are based on F 2 , conventional R-factors R are based on F, with F set to zero for negative F 2 . The threshold expression of F 2 > σ(F 2 ) is used only for calculating R-factors(gt) etc. and is not relevant to the choice of reflections for refinement. R-factors based on F 2 are statistically about twice as large as those based on F, and R-factors based on ALL data will be even larger.

Fractional atomic coordinates and isotropic or equivalent isotropic displacement parameters (Å 2 )
x y z U iso */U eq