
%0 Journal Article
%A Lim, M 
%T Cobalt(II), nickel(II) and zinc(II) complexes of 3,3'-[Ethane-1,2-diylbis(imino)]-bis(propanamide) in solution
%J Australian Journal of Chemistry
%D 1983/01/01
%V 36
%N 1
%P 19-24
%K 
%R https://doi.org/10.1071/CH9830019
%U https://www.publish.csiro.au/paper/CH9830019 
%X The interactions of 3,3'-[ethane-1,2-diylbis(imino)]bis(propanamide) (H2eip) with cobalt(II), nickel(II) and zinc(II) ions in 0.1 mol 1-1 KNO3 at 25ºC have been studied by means of potentiometry. In addition, the nickel system has also been studied by means of spectrophotometry, infrared and 13C n.m.r. spectroscopy. Equilibria (1) and (2) were found to hold:  Ni2++H2eip&#8596;Ni(H2eip)2+ (1) Ni2++H2eip&#8596;Ni(H2eip)2H+ For the other metal ions only equilibrium (1) was observed experimentally. The values of the equilibrium constants for cobalt, nickel and zinc are log K1 5.39, 7.59 and 5.05 respectively, and pK1'' 19.24 for nickel. For Ni(H2eip)2+, three absorption maxima were found at &#947;max 746, 595 and 367 nm with &#949;max values 6.5, 6.9 and 11.5 cm-1 mol-1l. respectively; for Ni(eip), only one absorption maximum at &#947;max 446 nm with &#949;max 91.9 cm-1 mol-1 l. was observed. 
