Abstract
The visible absorption spectra and the molar conductance curves of solutions of NiI 2, NiBr 2, Ni(BF 4) 2, Ni(ClO 4) 2 and Ni(CF 3COO) 2 DMSO at 25°C have been determined. The results indicate a weak association which is only of the outer-sphere type, in each case involving the Ni(DMSO) 2 + 6 complex. The conductance data are analysed using the Lee-Wheaton conductance equation for unsymmetrical electrolytes. The first-step association constants ( K 1) and the limiting ionic conductances, λ 0, for the Ni(DMSO) 2 + 6 cation as well as for the BF − 4 and CF 3COO − anions are obtained. A linear relation between log K 1 and the reciprocal of the anionic radius is observed. On the basis of this relation, the relative contribution of the outer-sphere association for solutions of NiCl 2 in DMSO is estimated.
Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
