Synthesis and Crystal Structure of Three Mixed-Ligand Silver(I) Complexes Constructed from 1,2-Di(4-Pyridyl)Ethylene and Different Organic Carboxylate Anions

Abstract

The reaction of AgNO3 with 1,2 di(4 pyridyl)ethylene (Dpe) and 2,3 pyrazinedicarboxylic acid (H2Pzdc) or 2,2' bipyridyl 4,4' dicarboxylic acid (H2Bpdc) or salicylic acid (HSa) in alcohol aqueous solu tion produces block like crystals of [Ag2(Dpe)2]Ppzdc) ⋅ 6H2O (I), [Ag3(Dpe)3](Bpdc)(NO3) ⋅ 4H2O (II), and [Ag2(Dpe)2](Sa)(NO3) ⋅ 3H2O (III) at room temperature. Crystal I is monoclinic: space group P21/m, a = 7.5370(7), b = 17.2309(16), c = 12.5131(11) A, β = 98.3780(10)°, V = 1607.7(3) A3, Z = 2. Crystal II is tri clinic: space group a = 8.8260(8), b = 11.1149(11), c = 13.3751(14) A, α = 102.0140(10)°, β = 105.696(2)°, γ = 99.5940(10)°, V = 1200.4(2) A3, Z = 1. Crystal III is triclinic: space group a = 7.3600(6), b = 2.7549(11), c = 18.2241(16) A, α = 106.225(2)°, β = 98.0150(10)°, γ = 99.5400(10)°, V = 1588.5(2) A3, Z = 2. All the three complexes contain sandwich like crystal structures, in which anionic sheets built up from different anions (Pzdc2–, Bpdc2–, Sa–) and lattice water molecules via rich hydrogen bonding interactions are inserted between the cationic silver complexes layers. The lattice water molecules are situated among the framework of the crystal structure and stabilized by rich hydrogen bonding interactions, and lattice water molecules may play a role in the orientation of the organic anions in the crystal packing. DOI: 10.1134/S1070328413010090 1, P 1, P