Lewis-Base Adducts of Group-11 Metal(I) Compounds. XXIX. Crystal Structures of Bis(Pyridine-4-carbonitrile)silver(I) Nitrate and Bis(4-benzoylpyridine)Silver(I) Nitrate Monohydrate

Abstract

The crystal structures of the title compounds, [Ag(C₆H₄N₂),] (NO₃), (I), and [Ag(C1₂H₉NO)₂] (NO₃).H₂O, (2), have been determined by single-crystal X-ray diffraction methods at ~295 K, being refined by full-matrix least-squares methods to residuals of 0.042 and 0.044 for 1814 and 3434 independent 'observed' reflections respectively. Crystals of (1) and (2) are triclinic P1; for (1) a, 27.954(7), b 6.354(2), c 3.710(1)Å, α 87.55(3), β 86.21(2), γ 89.35(2)º, Z 2; for (2), a 17.036(5), b 8.691(3), c 7.849(3) Å, α   107.74(2), β 97 53(2), γ 91 .11(2)º, Z 2. In both structures the formulation is basically a linearly coordinated complex cation/anion as shown above: in (I), Ag-N are 2.214(4), 2.203(4) Å with N-Ag-N, 162.2(2)"; in (2), Ag-N are 2.146(3), 2.147(3) Å, N-Ag-N, 175.3(1)º. The shortest Ag-O contact is found in (1) at 2.693(4)º. No close contacts are found between the silver atoms and cyano or ketonic ligand substituents.