Mariano Gracia, S. Otín, C. Losa
Jul 1, 1974
Citations
0
Influential Citations
16
Citations
Journal
The Journal of Chemical Thermodynamics
Abstract
Abstract The excess enthalpies of 1,1,2,2-tetrachloroethane + benzene, + cyclohexane, and + carbon tetrachloride and tetrachloroethylene + benzene, + cyclohexane, and + carbon tetrachloride were measured at 303.15 K. Mixing was endothermic except for 1,1,2,2-tetrachloroethane + benzene which was markedly exothermic. This exception is in agreement with the experimental evidence that the chlorine atom shows a specific interaction with aromatic molecules; there might also be a contribution from the formation of hydrogen bonds between the two components. Tetrachloroethylene + benzene is, however, strongly endothermic and the most plausible explanation of this behaviour is that the 3d level of the chlorine atoms has partially saturated its acceptor capacity with double-bond electrons.