Halogenated hydrocarbons, binary

Al-Hayan, M. N. M. Newsham, D. M. T. Isobaric vapour-liquid equihbria for mixtures containing halogenated hydrocarbons at atmospheric pressure I. Binary mixtures of trichloromethane + 1,2-dichloroethane, 1,2-dichloroethane + 1,1,2,2-tetrachloroethane, trichloromethane -1-1,1,2,2-tetrachloroethane and n-heptane -1-1,1,2,2-tetrachloroethane Fluid Phase Equilib. 1999,166,91-100... 

MICHEAU - My comments deals with azeotropic binary mixtures. We have recently made some experimental measurements of the thermodynamic parameters of a thermochronic equilibrium in azeotropic liquid mixtures. Our thermochronic equilibrium (Nickel complexes NiR + 2S N1R2S2) is sensitive to the donor number of the solvent S which is an empirical measure of the availability of the electronic doublet of S. What we have found in azeotropic mixtures (alcohol + halogenated hydrocarbons) is that near the room temperature there is a kind of natural compensation of the alcohol doublet availability by the presence of halogenated hydrocarbons molecules this compensation shifts the equilibrium position near 50/50 (solvated vs non solvated complex). This property is spontaneous with the azeotropes we have studied, but must to be adjusted accurately by varying the molar ratio with similar binary mixtures not giving azeotropes. So, it appears that azeotropes exhibit from this point of view some singular propertie. My question is Do you have or do you know some results about reactivity studies in azeotropic mixtures Could an azeotrope be considered as a model of a particular supermolecule or cluster ... 

The coordination chemistry of Mn111 with the halides210,335,572 is distinctly more limited than that of Mn" the former are good halogenating agents for hydrocarbon compounds and the only binary compound able to exist at normal temperatures is MnF3. Black solids, stable only below — 40°C, probably represent MnCl3, but the bromo and iodo compounds have never been observed. 

Thermal Properties, Silanes have less thermal stabflity than hydrocarbon analogues. The C—H bond eneigy in methane is 414 kj / mol (98.9 kcal/mol) the Si—H bond energy in silane is 3781 /mol (90.3 kcal/mol) (10). Silane, however, is one of the most thermally stable inoiganic silanes. Decomposition occurs at 500 0 in the absence of catalytic surfaces, at 300°C in glass vessels, and at 180°C in the presence of charcoal (11). Disilanes and other members of the binary series are less stable. Halogen-substituted silanes are subject to disproportionation reactions at higher temperatures (12). 

In the case of the halogen acids which are binary acids or non-oxygen acids the esters are the same as the alkyl halides, i.e., halogen substitution products of the hydrocarbons. With the oxygen acids, e.g., nitric, sulphuric, etc., the esters are not simple substitution products of hydrocarbons. With these inorganic acids which contain oxygen the acid... 

HDPE is not soluble in any known solvent at room temperature, although several solvents (ie, xylenes) have a swelling effect. However, certain binary solution mixtures including CS2 dissolve HDPE at as low as 30-40°C. Above 80°C HDPE dissolves in many aliphatic and aromatic hydrocarbons and their halogen-substituted derivatives. Solvents most frequently used include xylenes, tetralin, decalin, o-dichlorobenzene, 1,2,4-trichlorobenzene, and 1,2,4-trimethylbenzene. These solvents are employed for the determination of molecular weights from solution-viscosity data or by gpc. 

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