Synthesis, structural investigation and thermal stability of 2-aminoethanolo-κ-O-magnesium(II) phthalocyanine 2-aminoethanol solvate

2-Aminoethanolo-κ-O-magnesium(II) phthalocyanine 2-aminoethanol (2AE) solvate was obtained and its crystal structure was determined by single-crystal X-ray diffraction technique that has shown two molecules in the asymmetric unit. The Mg atom is 4+1 coordinated by isoindole N atoms of phthalocyaninate(2-) ring and by O atom of 2AE molecule in axial position. The last is hydrogen bonded with the solvate 2AE molecule. The phthalocyanine moieties are non-planar, the deviation of Mg(II) atom from the plane of four N-isoindole atoms is equal to ∼0.5 Å. The crystal packing shows the formation of back-to-back π–π stacked dimers of MgPc molecules, which form the channels, occupied by hydrogen bonded ligand molecules. Thermal studies of MgPc(2AE)·(2AE) revealed two-stage mass loss at 165 and 215 °C, which correspond to the loss of hydrogen bonded and coordinated 2AE molecules, respectively, and lead to the β-form of MgPc.