Reduction of nitrobenzene in the liquid phase by carbon monoxide (II) in the presence of palladium complexes

Conclusions We investigated the transformations of catalysts based on palladium complexes under the conditions of the catalytic reduction of nitrobenzene by carbon monoxide (II). We established that the reduced forms of the catalyst are Pd₂(PPh₃),₄(CO)·H₂SO₄ and Pd₂PPh₃)₄CO)· HClO₄, while the reduced forms are Pd(PPh₃)₂SO₄ and Pd(PPh₃)₃(H₂O)(ClO₄)₂ in the sulfate and the perchlorate media, respectively.Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 5, pp. 998–1002, May, 1989.