Two fluorescent silver(I)–saccharinato complexes of 2-methylpyrazine and pyrazine-2-carboxamide with Ag⋯Ag interactions

A three-dimensional silver(I) coordination polymer involving a new bridging mode of saccharinate

“…Consequently, the silver(I) centers show an approximate ''T"-shaped AgCNO coordination sphere [N1-Ag1-O1 = 164.66(9)°, N1-Ag1-C5 = 102.32(10)°and O1-Ag1-C5 = 92.86(10)°]. The Ag-N sac and Ag-O sac bond distances are within the normal range observed in the reported silver(I)-sac complexes containing the N-O carbonyl bridged dimers [5,7,8,13,22,23]. The Ag-C bond distance in 1 is 2.700(3) Å.…”

“…They prepared [Ag(sac)] n with an one-dimensional chain structure. Recently, we synthesized a number of mixed-ligand silver(I) complexes of sac due to their interesting structural and solid-state properties [6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21][22][23]. In addition to the most observed coordination modes, these silver(I) complexes also present new coordination modes of sac.…”

“…On the other hand, the N-Ag-O carbonyl angle of 164.66(9)°is consistent with the conclusion that the N-Ag-O carbonyl angles bigger than ca. 145°leads to argentophilic interactions, which become stronger as the angle approaches to linearity [23].…”

Dinuclear and polynuclear silver(I) saccharinate complexes with 1,3-diaminopropane and N-methylethylenediamine constructed from Ag⋯C interactions

“…These bond distances are within the normal range observed in the reported Ag(I)-sac complexes containing the N-O carbonyl bridged dimers[19,27]. The dimeric units are linked by nmen ligands, forming to a one-dimensional chain.…”

Synthesis, properties and crystal structures of nitrobenzoatocopper(II) complexes with pyrazinecarboxamide

“…Pyrazinecarboxamides can coordinate monodentately through the nitrogen atom of the pyrazine ring in the position 4, similar to nicotinamide [8][9][10][11][12][13] (Scheme 1a), or bidentately through the pyrazine nitrogen atom in the position 1 and the oxygen atom of carboxamide groups, such as picolinamide [14][15][16] (Scheme 1b), or use bridging modes that combine both of these modes [17,18] (Scheme 1c). Despite these various possibilities, the resulting type of coordination is also to some extent determined by the properties of the anionic co-ligand.…”