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We have synthesized β-tetrabromo- meso -tetraphenylporphyrinatooxidovanadium( iv ) (VOTPPBr 4 ) which possesses high thermal stability and nonplanar macrocyclic core. Further, it was utilized for selective epoxidation of olefins in good yields with very high TOF numbers.

rsc advances

Vanadyl β-tetrabromoporphyrin: synthesis, crystal structure and its use as an efficient and selective catalyst for olefin epoxidation in aqueous medium