Abstract
The title compound of a (2,3,12,13-tetrabromo-5,10,15,20-tetraphenylporphyrinato)oxidovanadium(IV) complex, VO(TPPBr4),·4CHCl3, was isolated and the crystal structure was determined by the single-crystal X-ray diffraction method at 90 K. It crystallizes in the monoclinic space group P21/m with a = 9.3075(12)Å, b = 20.839(3)Å, c = 13.7601(17)Å, β = 90.797(2)°, V = 2668.7(6)Å3, Dx = 1.833 g/cm3, and Z = 2. The R1 [I > 2σ(I)] and wR2 (all data) values are 0.0475 and 0.1419, respectively, for all 6298 independent reflections. The V-Naverage distance is 2.055(5)Å and the axial V=O distance is 1.604(4)Å. The porphyrin ring distorted to a saddle-shaped structure. Large red-shifts of the Soret and Q bands (observed at 462 nm and 562, 604 nm, respectively, in CH2Cl2) are considered to be due to distortion of the porphyrin ring.
