Application of Heterocyclic Amide Complexes with Succinates in Agriculture
Keywords:
Heterocyclic Amides, Succinates, Coordination Compounds, Biometals, Plant Growth Stimulant, TA-97Abstract
This paper presents the synthesis and investigation of coordination compounds of succinates of first-row transition biometals—Fe(II), Co(II), Ni(II), Cu(II), and Zn(II)—with heterocyclic amides such as nicotinamide, isonicotinic acid hydrazide, phthivazide, larusan, and metazide. The composition, structure, and coordination modes of the complexes were determined using IR, NMR, EPR spectroscopy, X-ray diffraction, thermal analysis, and quantum chemical calculations. The competitive coordination behavior of amides and succinate dianions was found to depend on the nature of the central metal ion and synthesis conditions. Based on the synthesized complexes, a plant growth-stimulating preparation, TA-97, was developed. Laboratory and field experiments demonstrated a significant increase in seed germination and cotton yield. Toxicological studies confirmed that TA-97 belongs to the low-toxicity class, indicating its potential for safe agricultural application.
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