ORGANIC COMPLEXES OF URANIUM: PART I. THE SYNTHESIS AND SPECTRUM OF URANYL PHTHALOCYANINE

Abstract

The preparation of uranyl phthalocyanine from uranyl chloride and dilithium phthalo-cyanine is described. The infrared and electronic spectra of the complex are quite different from that previously reported for uranyl phthalocyanine and it is suggested that previous workers obtained mainly a mixture of phthalocyanine (PcH2) and inorganic uranyl compounds. The infrared spectra of α- and β-PcH2, β-PcCu, PcLi2, and PcUO2 from 4000 to 300 cm−1; the far infrared spectra of β-PcH2, β-PcCu, and PcUO2 from 300 to 100 cm−1; and the electronic spectrum from 3500 to 10 000 Å of PcUO2 in 1-chloronaphthalene are recorded. A tentative assignment of a band at 278 cm−1 to the O—U—O bending frequency is made. The electronic spectrum of PcUO2 differs from previous spectra of metal phthalocyanines in that it possesses no strong absorption in the 6000–7000 Å region. It does, however, have a strong band at 9145 Å, ε = 4.15 × 104.