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Nitrogen trihydride

The vast number of compounds that exist require us to devise a systematic way to name them. Many compounds, however, aiso have common names that can oniy be teamed through famiiiarity or memorization. For exampie, H2O has the common name water and the systematic name dihydrogen monoxide. NH3 has the common name ammonia and the systematic name nitrogen trihydride. A common name is a sort of nickname for a compound, used by those who are familiar with it. Some compounds, such as carbon dioxide for example, are known only by their systematic names. Others, such as water, are known only by their common names. The systematic name of a compound can be assigned based on its chemical formula. In this section, we learn how to assign systematic names to simple ionic and molecular compounds. [Pg.110]

The electrosynthesis of hydride complexes directly from molecular hydrogen at atmospheric pressure by reduction of Mo(II) and W(II) tertiary phosphine precursors in moderate yield has been described as also the electrosynthesis of trihydride complexes of these metals by reduction of M(IV) dihydride precursors [101,102]. Hydrogen evolution at the active site of molybdenum nitrogenases [103] is intimately linked with biological nitrogen fixation and the electrochemistry of certain well-defined mononuclear molybdenum and tungsten hydrido species has been discussed in this context [104,105]. [Pg.113]

The volume of clear aluminum trihydride solution is reduced to about 600 ml. by nitrogen-stream evaporation and then allowed to warm to room temperature. After 6 to 8 hours, the aluminum trihydride-diethyl etherate precipitates, which leaves the small amount of soluble LiBH4 and aluminum trihydride-diethyl etherate in the ether solution. The product is filtered, washed twice with 100 ml. of anhydrous ether, and dried under high vacuum for 10 to 12 hours. A yield of approximately 30 g. (58%) is obtained. A nal. Calcd. for A1H3 0.3[(C2HS )20] J Al, 50.78 C, 28.21 H, 11.61 Hydrolytic H2,5.69. Found Al, 50.60 C, 28.08 H, 11.62 Hydrolytic H2,5.68. [Pg.50]

RT log K, where K—pmJPp Pvi- The free energy of the formation of phosphine from hydrogen and solid phosphorus at 25° is —3296-0 cals. The entropy change in the reaction calculated from the free energy equation is —27-72 so that the entropy of phosphine at 25° is 52-4 units. J. C. Thomlinson compared the heats of formation of the trihydrides of the nitrogen-antimony family of elements. [Pg.809]

The solution of aluminum trihydride used in this synthesis is prepared by the reaction of 100% sulfuric acid with lithium tetrahydridoaluminate(l —) in dry tetrahydrofuran.3 Under nitrogen flow, a stoichiometric amount of the sulfuric acid is added dropwise by syringe at 0° to a solution of lithium tetrahydridoaluminate(l —) in dry tetrahydrofuran. The apparatus used is just like that shown in Fig. 2, except that an ice bath is used to cool the reaction flask and thus prevent ether cleavage. As the sulfuric acid is added to the lithium tetrahydridoaluminate(l —), a precipitate of lithium sulfate forms and hydrogen is evolved. For this reason, the reaction must be carried out in a hood. After all the sulfuric acid has been added, the resulting slurry is stirred for 2 hr, then filtered in a glove box.4,5 The filtrate, a clear solution of aluminum trihydride in tetrahydrofuran, is stored in the refrigerator at -20° until it is needed. [Pg.6]

In this reaction between boron trihydride (BH3) and ammonia (NH3), the nitrogen atom donates both electrons that are shared by boron and ammonia, forming a coordinate covalent bond. [Pg.257]

Draw the dot and cross representation of the trihydride of nitrogen, i. e. ammonia, and so calculate the charge that is resident on each of the four atoms. [Pg.506]

The element to the left of oxygen in the Periodic Table is nitrogen. This has five electrons in its valence shell in the elemental state, and so in order to make up the octet it becomes involved in three covalent bonds. In the trihydride of nitrogen, namely ammonia, each of the constituent atoms bears a zero charge. [Pg.510]

Phenyltin trihydride (PhSnH ). Again using the above procedure, reaction of l.Og of phenyltin trichloride (Research Chem.) and 0.60g of lithium aluminium hydride provided a hexane solution which was concentrated under nitrogen to a liquid (bp 35°C at 2.5 Torr). A portion was quickly weighed, dissolved in hexane at the g/ y1 level, and immediately diluted to a 1.0 ng/yl working standard. The neat product rapidly decomposed to a coloured, insoluble material however, the yg/ yl hexane solution gave (GC-MS) a single peak with m/e 197 (PhSn) and 120 (Sn) with correct isotopic distributions and a IR spectrum with Sn-H at 1892 cm (lit. 1880 cm ). [Pg.326]


See other pages where Nitrogen trihydride is mentioned: [Pg.29]    [Pg.70]    [Pg.249]    [Pg.811]    [Pg.251]    [Pg.146]    [Pg.67]    [Pg.29]    [Pg.70]    [Pg.249]    [Pg.811]    [Pg.251]    [Pg.146]    [Pg.67]    [Pg.921]    [Pg.48]    [Pg.132]    [Pg.6]    [Pg.176]    [Pg.4148]    [Pg.394]    [Pg.261]    [Pg.4147]    [Pg.5]    [Pg.443]    [Pg.98]    [Pg.254]    [Pg.595]    [Pg.99]    [Pg.341]   


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