1:2 and 1:1 Ag(I)-Isonicotinamide Coordination Compounds: Five-Fold Interpenetrated CdSO4Network and the First Example of (Pyridine)N−Ag−O(Amide) Bonds

Abstract

On the basis of acid−pyridine and acid−amide hydrogen bond synthons in dicarboxylic acid−isonicotinamide complexes and proton/silver mimicry in carboxylic acids, isonicotinamide was reacted with AgBF4 to afford different coordination compounds. The crystal structure of [Ag(C5H4NCONH2)2][BF4] 1 has linear tapes of Npyridyl−Ag−Npyridyl (180.0°) connected via N−H···O and N−H···F hydrogen bonds in square nets with CdSO4 topology. The 16 × 17 Å voids eschew 5-fold interpenetration of identical nets. [Ag(C5H4NCONH2)][BF4] 2 provides the first occurrence of near linear Npyridyl−Ag−Oamide bonds (165.4°). The similarity in motifs of carboxylic acid and Ag(I) is extended to heterosynthons for crystal engineering.