Synthesis and Characterization of Nickel(II) complexes of n-Butyl – and iso-Butyldicyan- diamide in presence of alcohols

International Journal of Applied Chemistry

© 2019 by SSRG - IJAC Journal

Volume 6 Issue 3

Year of Publication : 2019

Authors : O.Ibopishak Singh, A.Bimola Devi

10.14445/23939133/IJAC-V6I3P106

How to Cite?

O.Ibopishak Singh, A.Bimola Devi, "Synthesis and Characterization of Nickel(II) complexes of n-Butyl – and iso-Butyldicyan- diamide in presence of alcohols," SSRG International Journal of Applied Chemistry, vol. 6,  no. 3, pp. 31-36, 2019. Crossref, https://doi.org/10.14445/23939133/IJAC-V6I3P106

Abstract:

Anhydrous nickel(II) chloride and nickel(II) nitrate hexahydrate promote addition of alcohols to n-butyl and iso-butyldicyandiamide. Hydrated nickel(II) chloride was found to be ineffective and could not produce alcohol addition product. Nickel(II) is found to be less efficient than copper(II) in forcing alcohol addition, a much longer reflux period being essential. The bis(ligand)nickel(II) complexes are all light yellow to orange yellow in color, diamagnetic i.e. no magnetic moment and absorb at around 22000-23000 cm-1. In the nickel(II) complexes, the nitrile band of the substituted dicyandiamide is completely absent, instead new bands appear at ca 1243 cm-1/1250 cm-1/1271 cm-1mbr. The presence of these bands indicate the alcohol addition reaction has led to the formation of 1-n-butylamidino-O-methylurea(1-BunAMeUH)(I) and 1-iso-butylamidino-O-methytlurea(1-BuiAMeUH)(II).
They possess square planer [NiN4] geometry. Characterization of Nickel(II) complexes have been made on the basis of elemental analysis, conductance, electronic absorption spectra, magnetic moment and IR spectra. The free ligands are isolated in the crystalline state.

Keywords:

Diamagnetic, Magnetic moment, Nitrile band, IR, Electronic absorption

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