Four copper(I) coordination polymers (CPs), {[CuIL]·CH3CN]} n (1), {[CuIL]·CHCl3} n (2), {[CuIL]·CH2Cl2} n (3), and [CuIL] n (4), were prepared by self-assembly reactions between CuI and (2-pyrazinylcarbonyl)thiomorpholine (L). CPs 1–4 are interconnected by rhomboid Cu–I2–Cu units. CPs 1 and 4 have one-dimensional loop-chain structures, and 2 and 3 adopt two-dimensional network structures. CPs 1–4 are pseudopolymorphic supramolecular isomers. CPs 2′ and 3′ are prepared by removal of solvate molecules from CPs 2 and 3, which are polymorphic supramolecular isomers with CP 4. Reversible crystal-to-crystal transformations were observed under appropriate conditions such as solvent or heat.

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In the title compound, C7H14NO5P, the phosphate group displays rotational disorder of three O atoms with an occupancy ratio of 0.832 (6):0.167 (6). The dihedral angle between the acryl­amide group and PO2 plane of the phosphate group is 75.69 (7)°. In the crystal, inter­molecular N—H⋯O and C—H⋯O hydrogen bonds link the molecules.

In the title compound, C14H14Cl2N2O, the imidazole ring is almost parallel to the benzene ring, the dihedral angle between them being 7.3 (2)°. In the crystal, there is an inter­molecular C—Cl⋯π inter­action (Cl⋯centroid = 3.36 Å and C—Cl⋯centroid = 89.2°). In addition, a Cl⋯Cl contact of 3.411 (1) Å and an inter­molecular C—H⋯N hydrogen bond are observed. These inter­actions contribute to the stabilization of the crystal packing.

In the title compound, C11H12NO4PS2, the dihedral angle between the phthalimidyl ring plane and the PS2 plane of the phospho­rodithio­ate group is 60.41 (3)°. In the crystal structure, weak inter­molecular C—H⋯O hydrogen bonds and S⋯S inter­actions [3.3825 (9) Å] contribute to the stabilization of the packing.