Nitrogen-containing derivatives, physical

Phosphorus compounds exhibit an enormous variety of chemical and physical properties as a result of the wide range ia the oxidation states and coordination numbers for the phosphoms atom. The most commonly encountered phosphoms compounds are the oxide, haUde, sulfide, hydride, nitrogen, metal, and organic derivatives, all of which are of iadustrial importance. The hahde, hydride, and metal derivatives, and to a lesser extent the oxides and sulfides, are reactive iatermediates for forming phosphoms bonds with other elements. Phosphoms-containing compounds represented about 6—7% of the compound hstiugs ia Chemical Abstracts as of 1993 (1). 

In general, pyridazine can be compared with pyridine. It is completely miscible with water and alcohols, as the lone electron pairs on nitrogen atoms are involved in formation of hydrogen bonds with hydroxylic solvents, benzene and ether. Pyridazine is insoluble in ligroin and cyclohexane. The solubility of pyridazine derivatives containing OH, SH and NH2 groups decreases, while alkyl groups increase the solubility. Table 1 lists some physical properties of pyridazine. 

For this particular product, in addition to a decrease in analysis time, a non-destructive method is especially desirable because of other physical tests that are also required on each sample By FNAA, the total nitrogen content of a sample is first detd and then related to compn of the mixture. Since Octols contain no ingredients other than pure TNT (18.50% N) and pure HMX (37.84%), the following linear relationship is derived from the ealed nitrogen content of each ingredient ... 

Amines and amides are two classes of organic compounds which contain nitrogen. Amines behave as organic bases and may be considered as derivatives of ammonia. Amides are compounds which have a carbonyl group connected to a nitrogen atom and are neutral. In this experiment, you will learn about the physical and chemical properties of some members of the amine and amide families. 

Most of interplanetary dust particles (IDPs) contain 2-10 % carbon by weight in a variety of physical forms, including amorphous materials with a minor amount of oxygen and nitrogen. Allamandola et al. [27] reported tliat both IDPs and meteorites might contain materials similar to PAHs. Clemett et al. [28] identified many PAHs and their alkylated derivatives in IDPs. 

Synthetic fuels derived from coal, shale, and tar sands are different from petroleum fuels in chemical and physical properties. Those different properties lead to substantial differences in combustion characteristics and emission. Relative to conventional oils, the synthetic fuels contain high aromatic, fuel nitrogen, and ash and trace mineral and low hydrogen, volatility, and heat of combustion and more corrosive in nature. Therefore, the combustion of synthetic fuels will generate more soot and more NOx and S02 emissions, and is more difficult to be used than that of petroleum fuels in a practical system. This is a challenge for combustion engineers to utilize synthetic fuels in full-scale equipment.19... 

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