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In the title compound, [Ag3(C12H12N2O2)4](PF6)3, one AgI ion, lying on a twofold rotation axis, is coordinated by four N atoms from four 1,3-bis­(4,5-dihydro-1,3-oxazol-2-yl)benzene (L) ligands in a distorted tetra­hedral geometry and the other AgI ion is coordinated by two N atoms from two L ligands in a bent arrangement [N—Ag—N = 169.03 (17)°]. Two L ligands adopt a syn conformation, while the other two adopt an anti conformation. They bridge adjacent AgI ions, forming a trinuclear complex. One of the PF6 anions is half-occupied, with the P atom located on a twofold rotation axis. The PF6 anions link the complex mol­ecules via Ag...F inter­actions [2.80 (2) and 2.85 (2) Å] into a polymeric chain along [100].

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The title compound, {[NiCl2(C5H6N2)(C3H7NO)]·C3H7NO}n, is a two-dimensional polymer in which the NiII atom is coordinated by two N atoms from two 3-amino­pyridine ligands, one O atom from a dimethyl­formamide (DMF) group, one terminal Cl and two bridging Cl atoms in a distorted octa­hedral geometry. The NiII atoms are bridged by the 3-amino­pyridine ligands [Ni...N = 6.7048 (3) Å] and Cl atoms [Ni...N = 3.5698 (3) Å], forming (4,4) two-dimensional nets. The DMF solvent mol­ecule and the non-bridged Cl ions participate in N—H...O and N—H...Cl hydrogen bonds with the amino groups.
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