Polymorphism, Hydrogen Bond Properties, and Vibrational Structure of 1H-Pyrrolo[3,2-h]Quinoline Dimers

Figure 7

Raman spectra measured for samples crystallized from five different solvents: cyclohexane (a), methanol (b), toluene (c), dichloromethane (d), diethyl ether (e). Dashed vertical lines indicate regions with structure-sensitive transitions (see text).