catena-Poly­[[bis(4-amino­pyrimidine-κN¹)copper(II)]-di-μ-dicyan­amido-κ⁴N¹:N³]

In the title octahedral complex, [Cu{N(CN)₂}₂(ampym)₂]_n (ampym is 4-amino­pyrimidine, C₄H₅N₃), the Cu atom is located on an inversion centre and is coordinated in the equatorial plane by two dicyan­amide nitrile N atoms and two N atoms from ampym ligands [Cu—N = 1.972 (2) and 2.001 (2) Å, respectively], and in the axial positions by another two dicyan­amide nitrile N atoms, at 2.633 (2) Å. Neighbouring Cu atoms are connected via double dicyan­amide bridges to form a one-dimensional infinite chain.

Diethyl 2,6-dimethyl-4-[5-(4-nitro­phen­yl)-2-fur­yl]-1,4-dihydro­pyridine-3,5-dicarboxyl­ate

In the crystal structure of the title compound, C₂₃H₂₄N₂O₇, mol­ecules are linked by N—H...O hydrogen bonds into infinite chains. The substituted 1,4-dihydro­pyridine ring has a shallow boat conformation. The 4-nitro­phenyl and 2-furyl rings are twisted in the same direction and are approximately perpendicular to the 1,4-dihydro­pyridine (DHP) ring. The carbonyl groups of the ester groups, at positions 3 and 5 in the 1,4-DHP ring, have different (cis/trans) configurations with respect to the double bonds in the 1,4-DHP ring