Di- and tetranuclear silver (I)-saccharinate complexes with 2-pyridineethanol and 2-pyridinepropanol: Syntheses, crystal structures, spectroscopic and thermal analyses of [Ag2(sac)2(pyet)2] and [Ag4(sac)4(pypr)2]

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

“…In the IR spectra of 1 and 2, broad peaks at 3386 cm À1 for 1 and 3428, 3311 cm À1 for 2 were assigned to the water and amine groups, respectively. A very strong absorptions at 1646 and 1625 cm À1 for 1 correspond to the carbonyl group vibration of two different sac ligands similar to those observed for [Ag 4 (sac) 4 (pypr) 2 ] (pypr = 2-pyridinepropanol) [6], while the sharp bands at 1698 and 1628 cm À1 for 2 are related to the m(CO) stretching vibration of the carbonyl groups of both pyzca and sac ligands, respectively [7]. The m as (SO 2 ) and the m s (SO 2 ) modes of sac occur as very strong bands at ca.…”

“…Some of the silver(I)-sac complexes contains the same dimeric unit of Ag 2 N 2 O 2 , which may include double N-O carbonyl or N-O sulfonyl bridges of sac. The N-O sulfonyl bridged dimers were found in [Ag 2 (sac) 2 (pyet) 2 ] (pyet = 2-pyridylethanol) [6], [Ag(l-sac)(dmpy)] n (dmpy = 2,6-pyridinedimethanol) [10] and [Ag(sac)(bheppz)] n (bheppz = N,N 0 -bis(2-hydroxyethyl)piperazine) [11] with the relatively small N-Ag-O sulfonyl angles (smaller than 110°) and the AgÁ Á ÁAg distances in these complexes are much longer than 3.30 Å. Argentophilic interactions are usually observed in [Ag 4 (sac) 4 Another factor affecting the argentophilic interactions seems to be the torsion angle involving the Ag-Ag bond and the other donor sites of co-ligands attached to the eight-membered bimetallic ring by the Ag-L bonds. The L-Ag-Ag-L angles in the silver(I)-sac complexes showing Ag-Ag interactions have been found to be completely linear (ie.…”

“…(pypr) 2 ], 2.8480(13) Å[6] and [Ag(sac)(nia)] n , 3.1593(4) Å (nia = nicotinamide)[7] and [Ag 2 (sac)2 (MeCN) 2 ] 2.9073(4) Å [12] with N-O carbonyl bridged dimers. The N-Ag-O carbonyl angles in [Ag 4 (sac) 4 (pypr) 2 ], [Ag(sac)(nia)] n and [Ag 2 (sac) 2 (MeCN) 2 ] are 165.5(3), 148.50(7) and 163.22(6)°, respectively.…”

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

“…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.…”

Thermal, solution and structural studies of a 3D Ag(I) coordination polymer with various Ag-Ag bonds, [Ag3(μ-Hbtc)(μ-H2btc)]n

“…2). The Ag-Ag interactions in compound 1 are longer than the Ag-Ag distances in similar dinuclear complexes (i.e., 2.704(2), 2.669(1), and 2.726(1) ) and slightly shorter than those in the polymeric structure [30][31][32][33][34][35][36][37][38]. These relatively short Ag-Ag bonds may be considered only d 10 ···d 10 noncovalent interactions [30][31][32][33][34][35][36][37][38].…”