Quasi-Isostructural Solvates of Bis(4-hydroxy-3,5-dimethylphenyl)(4‑N,N‑dimethylaminophenyl)methane

The hydrogen-bond motifs in different solvates of bis­(4-hydroxy-3,5-dimethylphenyl)­(4-N,N-dimethylaminophenyl)­methane (Ambp) at the O–H···O junctions of self-assembled host molecules are analyzed. The host molecules of the solvates, namely, Ambp.acetone (2), Ambp.dmso (3), Ambp.dma (4), Ambp.morpholine (5), and Ambp.piperidine (6), have one-dimensional hydrogen-bonded chainlike structures, and they crystallize in the P2₁/c space group. Examination of the guest interactions at the O–H···O junctions of the hosts revealed that the solvent molecules in 2 and 3 bind to the bridging O–H···O of the host molecules through a single-point hydrogen bond. The guest 3 has bifurcated hydrogen bonds with O–H···O bridges of the hosts, making an R₂²(6) motif, whereas in the case of 4 and 5, there are R₃³(7) motifs between hosts and guests at such junctions. The N–H bond of the morpholine or piperidine molecule in 4 or 5 interacts with the aromatic ring containing the NMe₂ group to form an η³-type N–H···π interaction. The asymmetric unit of 2Ambp.dabco.3H₂O (7), has two symmetry nonequivalent Ambp molecules, whereas Ambp.diox.H₂O (8) contains two symmetry nonequivalent dioxane molecules. The host molecules of Ambp.dbu (9) have structural similarities to 4 or 5 in terms of having R₃³(7) hydrogen-bond motifs (where diox = dioxane, dbu = 1,8-diazabicyclo[5.4.0]­undec-7-ene, and dabco = 1,4-diazabicyclo[2.2.2]­octane).