Synthesis and Spectroscopic Study of Praseodymium(III) Complexes with Di‐Substituted Heterocyclic Compound: N,N‐di Hydroxybenzalethylene(Sal₂en)

Praseodymium(III) complexes with Sal₂en (N,N‐di hydroxybenzalethyene) as ligand in 1∶2 and 1∶3 ratios were synthesized in alcoholic medium with Praseodymium nitrate as template agents. The complexes were characterized with IR, H¹NMR and thermogravimetrical analysis (TGA), differential thermogravimetrical analysis (DTA) and differential scanning calorimetery (DSC). A 1282.75 cm⁻¹ stretching frequency in IR spectra infer linkage of Pr(III) through nitrogen of Sal₂en, where Sal₂en behaves as bidentate ligand. The [octaaquobis (N,N‐di hydroxybenzalethylene) Praseodymium(III)] and [octaaquotris (N,N‐di hydroxybenzalethylene) Praseodymium(III)] are probable proposed structural formula of complexes. H¹NMR spectra confirms a further coordinate bond formation with N atom of synthesized ligand Sal₂en (N,N‐di hydroxybenzalethylene) completes coordination number of Praseodymium metal. Thermogravimetrically analysis inferred 1∶3 ratio complex compound slightly higher exothermic than of 1∶2.

Keywords:

• Praseodymium(III)
• N,N‐dihydroxybenzalethyene=Sal₂en
• thermogravimetrical
• bidentate ligand
• stretching frequencies

The authors are thankful to IIT Delhi, for recoding IR, HNMR, TGA, DTA, and DSC. Sushma thanks to her father for his valuable support, Miss Maneesha Pandey, Mrs. Shalini Gupta, and Mrs Sushila Singhal for precious time and knowledge; Dr. A. P. Raste, Principal, DBC for infrastructural support and Dr. Azad A. Khan, Department of Chemistry, JMI for fruitful discussion.