1:2 and 1:1 Ag(I)-isonicotinamide coordination compounds: Five-fold interpenetrated CdSO < inf > 4 < /inf > network 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(C 5H4NCONH2)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 x 17 Åvoids eschew 5-fold interpenetration of identical nets. [Ag(C5H4NCONH 2)] [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.