Preparation and properties of Yttrium, Lanthanum and lanthanide p-nitrobenzoates

The conditions of the formation of rare earth element p-nitrobenzoates were studied and their quantitative composition and solubilities in water at 298 K were determined (their solubilities are of the order of 10-3 moldm-3). The IR and X-ray spectra for the prepared complexes and the dehydrated rare earth p-nitrobenzoates were recorded. All obtained complexes are crystalline compounds. The conditions of thermal decomposition of the complexes were also studied. It was found that on heating above 573 K the complexes decompose explosively and undergo a melting process at the same time. Therefore the thermal decomposition for complexes being investigated was carried out in the temperature range 273-573 K. From the obtained results it follows that during the dehydration process no transformation of the nitro group to nitrito occurs. (Author)