Hydrogen-bonded assemblies of 20-(4-pyrid-yl)porphyrin-5 ⁴,10⁴,15⁴-tribenzoic acid with dimethyl sulfoxide and 4-acetyl-pyridine in their dimethyl sulfoxide and tetra-hydro-furan solvates

Crystals of the title compounds, 20-(4-pyrid-yl)porphyrin-5 ⁴,10⁴,15⁴-tribenzoic acid-dimethyl sulfoxide (2/5), C46H29N5O6·2.5C2H6OS, (I), and 20-(4-pyrid-yl)porphyrin-5 ⁴,10⁴,15⁴-tribenzoic acid-4-acetyl-pyridine- tetra-hydro-furan (1/2/10), C46H29N5O6·2C7H7NO·10C4H8O, (II), consist of hydrogen-bonded supra-molecular chains of porphyrin units solvated by mol-ecules of dimethyl sulfoxide [in (I)] and 4-acetyl-pyridine [in (II)]. In (I), these chains consist of heterogeneous arrays with alternating porphyrin and dimethyl sulfoxide species, being sustained by COOH⋯O=S hydrogen bonds. They adopt a zigzag geometry and link on both sides to additional mol-ecules of dimethyl sulfoxide. In (II), the chains consist of homogeneous linear supra-molecular arrays of porphyrin units, which are directly connected to one another via COOH⋯N(pyridyl) hydrogen bonds. As in the previous case, these arrays are solvated on both sides by mol-ecules of the 4 - acetyl-pyridine ligand via similar COOH(porphyrin)⋯N(ligand) hydrogen bonds. The two crystal structures contain wide inter-porphyrin voids, which accommodate disordered/diffused solvent mol-ecules, viz. dimethyl sulfoxide in (I) and tetra-hydro-furan in (II).