2025, Vol. 6, Issue 2, Part B
Design, synthesis, and spectroscopic characterization of electron-withdrawing substituted formazans
Author(s): Maruti Aldar, Shardini Wakchoure, Vinayak Patil and Vishal Banewar
Abstract: An efficient synthetic route has been developed for the preparation of formazan derivatives bearing electron-withdrawing groups. This methodology facilitated the synthesis of compounds substituted with cyano and nitro moieties at the 3-position, isolated in high purity and appreciable yields. The structures of these compounds were extensively characterized via infrared (IR), proton and carbon nuclear magnetic resonance (¹H and ¹³C NMR), ultraviolet-visible (UV-Vis) spectroscopy, and mass spectrometry. Distinctive spectral markers, including the pronounced cyano stretching band near 2262 cm⁻¹ and nitro group vibrations at approximately 1570 and 1353 cm⁻¹, confirmed the successful incorporation of these substituents. UV-Vis analysis revealed a significant bathochromic shift in the nitro derivative relative to the cyano analog, underscoring the profound impact of electron-withdrawing groups on the azo chromophore. This research highlights a viable synthetic strategy and provides insight into how electronic substituents influence the structural and spectroscopic properties of formazans.
DOI: 10.22271/reschem.2025.v6.i2b.208
Pages: 101-103 | Views: 110 | Downloads: 32
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How to cite this article:
Maruti Aldar, Shardini Wakchoure, Vinayak Patil, Vishal Banewar. Design, synthesis, and spectroscopic characterization of electron-withdrawing substituted formazans. J Res Chem 2025;6(2):101-103. DOI: 10.22271/reschem.2025.v6.i2b.208
