Abstract
In the title dinuclear Nb
V
compound, [Nb
2
(C
44
H
28
N
4
)
2
O
3
], each Nb atom is seven-coordinated with three bridging O atoms and four N atoms from a chelating tetraphenylporphyrinate anion. The Nb—O bond lengths range from 1.757 (6) to 2.331 (6) Å, and the average (niobium–pyrrole N atom) distance is 2.239 Å. In the dinuclear molecule, the Nb⋯Nb separation is 2.8200 (8) Å, and the dihedral angle between the two porphyrinate mean planes is 5.4 (1)°. Weak intermolecular C—H⋯π interactions are present in the crystal structure.