• Dr. Harimohan Kumar
• Dr. Vikash Kumar Singh
• Surjeet Kumar

A series of new structurally novel unsymmetrical Schiff base ligands were prepared by the condensation reaction in a 1:1:1 molar ratio of 2-hydroxy-1-naphthaldehyde, 2,6-diaminopyridine and substituted salicylaldehyde or salicylaldehyde and kept stirring at room temperature for four days. All the ligands formed were orange yellow in color and melted within the range 135-1950C. They were also obtained in high yield and high purity. The following factors were found to affect the course of the synthesis (i) The sequence of addition of the reagents, (ii) Temperature of the solution of the starting reagents (Solution chilled to about 40 C), (iii) The nature of the diamine used and (iv) The reaction time. A change in reaction time from four days to just three hours or the use of warm solution of the starting reagents produced mixed products. From the above observations it seems that the condensation reactions occurred stepwise.

STUDIES ON Ni++ COMPLEXES WITH SCHIFF BASE LIGANDS

"STUDIES ON Ni++ COMPLEXES WITH SCHIFF BASE LIGANDS", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.5, Issue 9, page no.631-636, September-2018, Available :http://www.jetir.org/papers/JETIR1809888.pdf

"STUDIES ON Ni++ COMPLEXES WITH SCHIFF BASE LIGANDS", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.5, Issue 9, page no. pp631-636, September-2018, Available at : http://www.jetir.org/papers/JETIR1809888.pdf