(4-Cyano-phenolato)(subphthalocyaninato)boron.

The crystal structure of the title compound, C(31)H(16)BN(7)O, (CNPhO-BsubPc) is characterized by pairs of π-π stacking inter-actions between the concave faces of inversion-related BsubPc fragments with a centroid-centroid distance of 3.600 (1) Å. In addition, these pairs of mol-ecules are linked into chains along [101] through further weak π-π stacking inter-actions with a centroid-centroid distance of 3.8587 (9) Å. There are also weak C-H⋯π(arene) inter-actions within the chains.