Open AccessSynthesis, Spectral and Thermal Properties of Hydrazinium, Aminoguanidinium and Pyridinium Uranyl Pyridine-2,6-Dicarboxylates
Author(s) -
T. Hussain,
B. Sivasankar
Publication year - 2020
Publication title -
asian journal of chemistry/asian journal of chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.145
H-Index - 34
eISSN - 0975-427X
pISSN - 0970-7077
DOI - 10.14233/ajchem.2020.22667
Subject(s) - chemistry , uranyl , pyridinium , pyridine , thermogravimetric analysis , inorganic chemistry , protonation , hydrazine (antidepressant) , aqueous solution , pentagonal bipyramidal molecular geometry , medicinal chemistry , molecule , organic chemistry , ion , chromatography
Anionic complexes, pyridine-2,6-dicarboxylato uranylate containing protonated weak bases such ashydrazine, guanyl hydrazine and pyridine as charge neutralizing entities have been isolated from aqueoussolution containing respective bases, dipicolinic acid and uranyl nitrate hexahydrate. The molecularcompositions and structural geometries have been assigned by analyzing their elemental analyses,spectral data and thermal patterns and the molecular formulae, A2[UO2(PDC)2] where A= N2H5+/ AGH+(aminoguanidinium) or PYH+ (pyridinium) cation and PDC = pyridine-2,6-dicarboxylate dianion hasbeen proposed for the newly synthesized coordination compounds. Oxidative degradation in air yieldedU3O8 as the residue, which has been proposed on the basis of thermogravimetric weight loss andpowder XRD pattern. Based on the spectral results and careful analyses, a hexagonal bipyramidalgeometry has been assigned for all the three uranyl(II) complexes.