Schiff base coordination flexibility toward binary cobalt and ternary zinc complex assemblies. The case of the hexadentate ligand N,N′-bis[(2-hydroxybenzilideneamino)-propyl]-piperazine

Crystal structure of 7-hy-droxy-8-[(4-methyl-piperazin-1-yl)meth-yl]-2H-chromen-2-one

There is an intra­molecular O—H⋯N hydrogen bond forming an S(6) ring motif in the title compound. In the crystal, mol­ecules are linked by C—H⋯O hydrogen bonds with a C(4) chain motif, and also by C—H⋯π inter­actions. The chains are linked by π–π inter­actions, forming a sheet parallel to the bc plane.

In the title compound, C₁₅H₁₈N₂O₃, the coumarin ring is essentially planar, with an r.m.s. deviation of 0.012 Å. An intra­molecular O—H⋯N hydrogen bond forms an S(6) ring motif. The piperazine ring adopts a chair conformation. In the crystal, a C—H⋯O hydrogen bond generates a C(4) chain motif running along the c axis. The chain structure is stabilized by a C—H⋯π inter­action. The chains are linked by π–π inter­actions [centroid–centroid distance of 3.5745 (11) Å], forming a sheet structure parallel to the bc plane.