Synthesis and properties of hydrazones from 3- and/or 5-nitro-2-pyridylhydrazine and heterocyclic aldehydes, characterization of their complexes and extraction-spectrophotometric determination of traces of nickel with 2-pyridinecarbaldehyde 3,5-dinitro-2-pyridylhydrazone

✍ Scribed by Tsugikatsu Odashima; Hajime Ishii

• Publisher: Elsevier Science
• Year: 1993
• Tongue: English
• Weight: 846 KB
• Volume: 277
• Category: Article
• ISSN: 0003-2670
• DOI: 10.1016/0003-2670(93)85092-x

✦ Synopsis

Four new hydraxones, 2-pyridinecarbaldehyde 3-nitro-2pyridylhydraxone, 2pyridinecarbaldehyde 3,5-dinitro-2pyridylhydraxone (PA-3,5-NPH), 2-quinolinecarbaldehyde 5-nitro-Zpyridylhydrazone and (i-phenanthridinecarbaldehyde %nitro-2_pyridylhydraxone, were synthesized. Their properties and reactivities with metal ions and the properties of the resultant complexes were investigated spectrophotometrically and compared mutually and with those of 2-pyridinecarbaldehyde 5-nitro-2-pyridylhydraxone. Useful information on the molecular design of the hydraxone reagent was obtained. A highly sensitive and practical extraction-spectrophotometric method for the determination of nickel with PA-3,5-NPH was developed and applied successfully to the determination of nickel in steel samples.