Liquid−Liquid Coexistence Curves of Dimethyl Carbonate + n-Decane and Dimethyl Carbonate + n-Tetradecane in the Critical Region

The liquid−liquid coexistence of dimethyl carbonate + n -decane and dimethyl carbonate + n -tetradecane has been determined within 10 K from the critical temperature by measurements of refractive index n . The critical amplitude B and the critical exponent β have been deduced from the coexistence curves. Experimental values of β are consistent with theoretical prediction. The results have also been analyzed to determine Wegner-correction terms when β and Δ are fixed at the theoretical values and to examine the asymmetric behavior of the diameters of the coexistence curves.