eng Ansari Education and Research Society Journal of Ultra Chemistry 0973-3450 2319-8036 November 2020 16 6 78 82 http://dx.doi.org/10.22147/juc/160601 914 article R.N. Sharma 1 Ashok Kumar Mishra 2 B. Laxmi Kanth 3 Soni Kumari 4 Principal, SHS Govt. PG College, Dhanapur ,Chandauli, UP (India) Deptt of Chemistry , K N Govt PG College, Gyanpur (India) Prof andHead in Biochemistry , SSIMS , Bhilai, C.G. (India) Deptt of Botany, P.P.K College,Bundu, Jharkhand (India) <p style="text-align:justify">Some air stable electrolytic and non-electrolytic mixed ligand complexes of Mn(ll) ion with isonicotinic acid hydrazide have been synthesized and characterized by various physico chemical data based on micro analytical analysis, magnetic measurement, conductivity measurement, near and far infrared and electronic spectrophotometric studies. Various vibrational and spectral bands of ligand and complexes were studied and compared. The mode of shifting were used to diagnose the coordinating behaviour of donor element of ligand with Mn (ll) ions. All complexes were screened against Aspergillus flavus and classified as a mixed fungicide. Tentative octahedral geometry has been assigned for all Mn (ll)complexes.</p> https://journalofchemistry.org/paper/914/ Ligand, Complexes, Biochemical, Fungicide