Tetrachloromethane 1,4-dioxane mixture

Data have been presented on the kinetics of nitration of acetanilide in mixtures of nitric and sulfuric acids.29 A review discusses the several mechanisms operative in the nitration of phenol including /> / -sclective nitrosation-oxidation and mechanisms involving phenoxy radical-nitrogen dioxide reaction yielding a 55 45 ortho para nitration ratio.30 The kinetics of mononitration of biphenyl-2-carboxylic acid have been investigated in several solvents. The maximum ortho para product ratio of 8.4 is observed in tetrachloromethane.31 Nitration products were not formed in the presence of dioxane.31,32 Quantum-chemical AMI calculations were performed and the predominant formation of the ortho-nitro product is accounted for by stabilization of the cr-complex by the carboxyl group.33... 

Mixtures With Complex Formation In some instances, mixing of two liquids causes the formation of a chemically bonded complex in the mixture. One would expect that the formation of the complex should result in a significant lowering in energy and hence, a large negative HExamples are shown in Figure 17.1018 for mixtures of tetrachloromethane with N,N-dimethylformamide (DMF) and with 1,4-dioxane. 

Inglese, A. Wilhelm, E. Grolier, J.-P. E. Kehiaian, H. V. Thermodynamics of binary mixtures containing cyclic ethers. 3. Excess enthalpies of oxolane, 1,3-dioxolane, oxane, and 1,3-dioxane + benzene and + tetrachloromethane J. Chem. Thermodyn. 1981,13, 229-234... 

Van Ness, H. C. Abbott, M. M. Excess enthalpies and excess volumes of dichloromethane, trichloromethane, or tetrachloromethane + oxane, -1-1,4-dioxane, -1- 2-propanone, or -1- methyl ethanoate Int. DATA Ser., Sel. Data Mixtures, Ser. A 1974, 2, 84-95... 

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