Oxygen compounds, vapor pressure

Compound Formula M.p.t. [°C] B.p.t. [°C] Oxygen sensitivity Vapor pressure Comments... 

Compound Ambient state" Oxygen sensitivity Vapor pressure s Solid Vapor... 

N s are the numbers of atoms of carbon (C), sulfur (S), hydrogen (H), halogens (X), and oxygen (O) in the molecule. P is the total system pressure. is the vapor pressure of the compound at the flash point temperature. 

Results for vapor pressure as a function of temperature are presented for major organic chemical compounds. The coefficients are displayed in an easy-to-use table which is especially applicable for rapid engineering usage with the personal computer or hand calculator. The organic chemicals encompass hydrocarbon, oxygen, nitrogen, halogen, silicon, sulfur and other chemical type compounds. 

Kobe, K.A. and Mathews, J.F. Critical properties and vapor pressures of some organic nitrogen and oxygen compounds, J. 

In investigating the reaction of oxygen atoms with isobutene, analysis for propene was carried along with that for carbonyl compounds and CO. Propene was separated from isobutene at —112° to about — 115°C., which was possible due to the sufficient difference in vapor pressures (Table III). Experimental results have shown that the amounts of for-... 

The best results were obtained with compound 21 that exhibited high vapor pressure and low decomposition temperature (<523 K). Various CVD conditions were applied and gave in all cases shiny, dark-brown deposits.43 XRD and XPS analyses of the deposits indicated the presence of a vanadium carbonitride phase with little contamination from oxygen and free carbon. The films were less adherent on steel substrates than on silicon ones. The steel substrates seemed to suffer corrosion due to the presence of Cl-containing species. We had noticed the same feature in the case of Cl-containing precursors to vanadium carbide. Therefore, in order to increase the volatility of compound 23 and to reduce the Cl content of the molecule, we prepared compounds 24 and 25. Unfortunately, the yields obtained in their syntheses were much too low to permit TG and CVD experiments. 

With continuing exposure to oxygen compounds, irreversible damage to catalyst activity may occur due to the growth of iron primary crystallites. This damage depends on the water vapor partial pressure and is especially serious at high temperatures. 

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