Synthesis of copper and zinc chloride complexes with triand tetranitrofluorenones. Crystal and molecular structure of 2,4,5,7- tetranitrofluorenone

The complexes MLCl2 · nH2O and ML 2Cl2 · nH2O, where M = Cu(II), Zn and n = 1-4, were isolated and identified due to the reactions of Cu(II) and Zn (II) chlorides with 2,4,7-trinitrofluorene (L1), 2,4,7-trinitrofluorenone (L1a), and 2,4,5,7-tetranitrofluorene (L2). It was shown that, during complex formation, L1 and L2 were oxidized to fluorenones (L1a, L2a) and as neutral ligands formed 1:1 and 2:1 complexes with metal cations. A single crystal of tetranitrofluorenone (L2a) was isolated, and its crystal and molecular structure was determined. The complexes were studied by X-ray powder diffraction analysis, their spectral (IR and UV) characteristics were determined, and the structures for the complexes were proposed. © Pleiades Publishing, Ltd., 2010.