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A series of octa-substituted metal phthalocyanines [MPc(OC5H11)8] (M = Co, Ni, Cu, Zn, Pc = phthalocyaninato, (OC5H11)8 = iso-pentoxy) were obtained from condensation of iso-pentoxy phthalonitrile in the presence of DBU in n-pentanol. The compounds were characterized using elemental analysis, IR, and UV/Vis spectra. The crystal structures of all compounds except M = Zn were determined by X-ray diffraction methods. It was found that the distortion of Pc skeleton come of not only the intra-molecular steric congestion of bulky substituents, but also the slipped overlaps of the closest molecules. The relations of some bond lengths of the Pc's skeleton to the substituents and central metal atom, as well as the spectroscopic properties are discussed.

The crystal structure of 1,4,8,11,15,18,22,25-octaethyloxyphthalocyaninatocopper was determined by X-ray diffraction. The ring skeleton distortion is shown, which not only attributed to inter-molecular steric congestion of substituents but also to the less overlap of the skeletons.