Reactivity of the magnesium phthalocyanine in dry 3,5-lutidine, in 3,5-lutidine/DMSO and in 3,5-lutidine/acetylacetone systems

Add time:07/28/2019    Source:sciencedirect.com

Reactivity of magnesium phthalocyanine (MgPc) in the dry 3,5-lutidine (3,5-lut), in the 3,5-lut/DMSO and in 3,5-lut/acetylacetone (acacH) systems has been investigated. Reaction of MgPc with dry 3,5-lut leads to formation of MgPc(3,5-lut)2 compound (1), in which the Mg atom is characterized by rarely encountering in magnesium phthalocyanines 4+2 type of coordination. Depending on the thermal conditions and the 3,5-lut quantity in the system the solvothermal reaction of MgPc with 3,5-lut/DMSO system leads to formation of three crystalline complexes: MgPc(H2O)·(3,5-lut) (2), MgPc(H2O)·2(3,5-lut) (3) and 2[MgPc(H2O)]·7(3,5-lut) (4). The presence of water in the crystalline complexes is governed by a high affinity of MgPc to water. In these complexes in the solid-state the central Mg atom of MgPc exhibits 4+1 coordination. The reaction of MgPc in the case of 3,5-lut/acacH system leads to formation of crystalline Mg(acac)2(3,5-lut)2 compound (5). The structure of all complexes has been determined by X-ray single crystal diffraction. All compounds were also characterized by thermogravimetric analysis and the compounds 1–4 were also characterized by UV–Vis spectroscopy in solution, whereas compound 5 was characterized by vibrational spectroscopy (IR and Raman).

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