Abstract: | As a result of the use of various oxidants, mono- and bications of the natural vanadylporphyrins of Karazhanbass petroleum have been obtained, and their ESR spectra have been studied.Institute of the Chemistry of Petroleum and Natural Salts of the Kazakh SSR Academy of Sciences, Gur'ev. Translated from Khimiya Prirodnykh Soedinenii, No. 2, pp. 190–193, March–April, 1990. |