Hydrogen carbon hydrides

The cleavage of a carbon-hydrogen bond (hydride abstraction) has been reported for 7-alkylaminocydoheptatrienes to yield tropenyliden-iminium salts (10a,10b). This unique class of compounds had been prepared... 

Interstitial Solid Solutions Interstitial solid solutions involve occupation of a site by introduced ions or atoms, which is normally empty in the crystal structure, and no ions or atoms are left out. Many metals form interstitial solid solutions in which small atoms (e.g., hydrogen, carbon, boron, nitrogen) enter empty interstitial sites within the host structure of the metal. Palladium metal is well known for its ability to absorb an enormous volume of hydrogen gas, and the product hydride is an interstitial sohd solution of formula PdH, 0 0.7, in which hydrogen atoms occupy... 

At elevated temperatures, the hydride reduces carbon dioxide or sodium hydrogen-carbonate to methane and ethane. The latter are probably the explosive reaction products produced when carbon dioxide extinguishers are used on LAH fires. 

Aluminium hydride, Carbon dioxide, or Sodium hydrogen carbonate, 0070... 

Four different methods to store hydrogen are currently available compressed gas, liquid hydrogen, metal hydrides and sorption on different porous materials (carbon materials, zeolites, metal organic frameworks, etc).2-4... 

The formation of several volatile carbon hydrides in the hydrogen-graphite reaction between 360 and 800° was reported by Breisacher and Marx (138). The formation of ethane, ethylene, propylene, and even butane suggests that the edge of the carbon layers became hydrogenated in the first step of this reaction. The results were discussed on the basis of a mechanism proposal by Zielke and Gorin (139). 

Sulfur dioxide also can be reduced by hydrogen, carbon, carbon monoxide, carbon disulfide, certain metals, metal hydrides, and sodium borohydride when heated at high temperatures ... 

But carbon is not unique in forming bonds to itself because other elements such as boron, silicon, and phosphorus form strong bonds in the elementary state. The uniqueness of carbon stems more from the fact that it forms strong carbon-carbon bonds that also are strong when in combination with other elements. For example, the combination of hydrogen with carbon affords a remarkable variety of carbon hydrides, or hydrocarbons as they usually are called. In contrast, none of the other second-row elements except boron gives a very extensive system of stable hydrides, and most of the boron hydrides are much more reactive than hydrocarbons, especially to water and air. 

Method B.104 In a 1-litre flask equipped with a condenser, a thermometer and a dropping funnel is placed 0.3 mol of lithium aluminium hydride (CAUTION, see Section 4.2.49, p. 445) in dry ether (300 ml). A nitrogen atmosphere is maintained throughout the reaction. To this stirred solution 0.45 mol of ethyl acetate is added over a period of 75 minutes maintaining the temperature at 3-7 °C. The reaction is stirred for an additional 30 minutes. To this solution at —10 °C is added 29.1 g (0.3 mol) of hexanenitrile in 5 minutes. The reaction temperature rises to 12°C in 10 minutes with the formation of a viscous solution. It is allowed to stir for another 50 minutes at 3 °C. The reaction mixture is decomposed by the addition of 300 ml of 2.5 m sulphuric acid. The ether layer is separated and the aqueous layer is extracted with ether. The combined ether extracts are washed with sodium hydrogen carbonate solution and water and dried over anhydrous sodium sulphate (1). 

Sodium chlorate, or Non-metals, or Sulfides, 4033 Sodium dihydrobis(2-methoxyethoxy)aluminate, 2570 Sodium hydride, Water, 4438 Sodium hydrogen carbonate, Carbon, Water, 0389... 

Aggett and Kadwani [13] employed a two stage single column anion exchange method using sodium hydrogen carbonate and chloride as eluate anions. These species appear to have no adverse effects in subsequent analytical procedures. Its successful application is dependent on careful control of pH. Analyses were performed by hydride generation atomic absorption spectroscopy... 

Separation factors of hydrogen (H2), hydride of deuterium (HD) and deuterium (D2) have been determined for adsorption of hydrogen isotopes mixtures on the samples NPC at temperatures 68 K and 78 K. The values don t extremely large. They are close to ones of active carbons. 

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