[5,15-Bis(2-methyl­prop­yl)porphyrinato]nickel(II)

The title compound, [Ni(C₂₈H₂₈N₄)], crystallizes with two independent mol­ecules in the unit cell, one of which is located on an inversion center. Both macrocycles exhibit a planar conformation with average deviation from the least-squares-plane of the 24 macrocycle atoms of Δ24 = 0.043 Å for the first mol­ecule and 0.026 Å for the mol­ecule located on an inversion center. The average Ni—N bond lengths are 1.955 (2) and 1.956 (2) Å in the two mol­ecules. The mol­ecules form π–π dimers of inter­mediary strength with a mean plane separation of 3.36 (2) Å.