Dichloro­phosphinic bis­(2-chloro­eth­yl)amide

In the title compound, C₄H₈Cl₄NOP, the two chloro­ethyl groups are not related by crystallographic symmetry. The difference in the conformation of the two groups is shown by their N-C-C-Cl torsion angles of 64.57 (15) and 175.62 (10)°.

Poly[[diaqua­bis­{μ-4-[6-(4-carb­oxy­phen­yl)-4,4′-bipyridin-2-yl]benzoato-κ²O:N^1′}copper(II)] dimethyl­formamide tetra­solvate]

In the title compound, {[Cu(C₂₄H₁₅N₂O₄)₂(H₂O)₂]·4C₃H₇NO}_n, the Cu^II ion, lying on an inversion center, is six-coordinated by two N atoms from two 4-[6-(4-carb­oxy­phen­yl)-4,4′-bipyridin-2-yl]benzoate (L) ligands, two deprotonated carboxyl­ate O atoms from two other symmetry-related L ligands and two water mol­ecules in a slightly distorted octa­hedral geometry. The Cu^II atoms are linked by the bridging ligands into a layer parallel to (101). The presence of intra­layer O—H...O hydrogen bonds and π–π inter­actions between the pyridine and benzene rings [centroid–centroid distances = 3.808 (2) and 3.927 (2) Å] stabilizes the layer. Further O—H...O hydrogen bonds link the layers and the dimethyl­formamide solvent mol­ecules.