Synthesis, structural investigation and thermal stability of aqua magnesium(II) phthalocyanine bis(diethylamine) solvate

Aqua magnesium phthalocyanine bis(diethylamine) complex was obtained in the crystalline form and its crystal structure was determined by single-crystal X-ray diffraction. The Mg atom is 4 + 1 coordinated by four N isoindole atoms and one O atom. The MgPc moiety is non-planar, the Mg(II) is deviated by 0.492(2) Å from the N4-isoindole plane towards the oxygen atom of water molecule. The arrangement of MgPc(H2O) and diethylamine molecules is determined by O–H⋯N hydrogen bonds and π–π interactions. The complex is stable up to ∼140 °C. At this temperature the complex loses diethylamine molecules and next at ∼200 °C loses the water molecule and finally converts into β-MgPc.