Sodium interaction

Y. Ferro, A. Allouche, and V. Kempter, Electron solvation by highly polar molecules Density functional theory study of atomic sodium interaction with water, ammonia, and methanol. J. Chem. Phys. 120, 8683 8691 (2004). 

If the notion that 15-crown-5 is selective for Na" " is correct, then Ks for the interaction 15-crown-5 Na+ should be greater than the interaction 15-crown-5 K+. We see from Table I that log Ks for the sodium interaction is 3.24 (1,740) compared to 3.43 (2,690) for potassium. An alternate definition of Na+-selectivity might be that 15-crown-5 binds Na" " more strongly than 18-crown-6 binds Na" ". The log Ks values for this pair of interactions is, respectively, 3.24 (1,740) vs. 4.35 (22,400). Clearly, 15-crown-5 is not selective for Na" " and the simple "hole-size rule does not correctly account for the results. 

Although phenyl-sodium and -potassium may be made from reactions between phenyl-lithium and the heavier metal alkoxides, the structures of the donor-free solid compounds are apparently still unknown. The dimeric adducts [NaPh.PMDTA]2 and [NaC6H4Ph.TMEDA]2 have been characterized1 and the structure of a solvent-free arylsodium [Na(C6H3Mes2-2,6)]2, 32 (Fig. 17), has been described.63 The sodium interacts with the ipso... 

Metals. Lithium shavings or sodium interact with dichloromethane, becoming shock-or impact-sensitive explosives.6... 

With lithium counterions, as compared with sodium cations, a similar explanation holds. The water-lithium interaction is stronger than the water-sodium interaction. Hence, there is a somewhat greater tendency for lithium-coordinated water molecules to reorient around the 0-M axis — hence the observed smaller value... 

How many centigrams of hydrogen will be liberated when 23 eg. of sodium interact with water How many centigrams, if the sodium had contained 8 per cent of impurities ... 

Tenidap sodium interacts with hthium, reducing its renal clearance and increasing steady-state lithium concentrations the dosage of lithium should be reduced to avoid toxicity (7,8). 

Tenidap sodium interacts with warfarin by displacing it from plasma albumin, although there may be another mechanism the dosage of warfarin may need to be reduced to avoid toxicity (7,10). 

This is one of several reactions of this type in which an organic negative radical-ion and its parent molecule react in the presence of an alkali metal. It is found, rather interestingly, that the rate coefficients depend on the nature of the metal. To account for this, it has been postulated that the metal is involved in a bridging role in the activated complex, e.g., dipy.. K" ". . dipy for the case of 2,2 -dipy-ridyl (dipy) A more extreme case of this association between the radical-ion and the ion of the alkali metal used to form it occurs in the reaction of benzophenone with its negative ion. The spectrum of (benzophenone)" in dme has many hyper-fine lines caused by the interaction of the free electron with the and, when the metal is sodium, the Na nuclei. When benzophenone is added, the structure, due to the proton interaction, disappears and only the lines associated with the sodium interaction remain. To account for this, it has been suggested that the odd electron moves rapidly over all the proton positions too fast for the lines characteristic of the electron in the different proton environments to be seen), but relatively slowly from one sodium nucleus to another. Seen another way, this means that the transfer of an electron from molecule to molecule is associated with the transfer of the cation . ... 

When many of the most reactive metals—those in Groups 1 and 2—come into contact with water, they release hydrogen and produce a metal hydroxide compound. An example of a Group 1 hydroxide formation is the reaction that takes place when sodium interacts with water. When a piece of sodium is dropped into water, the sodium starts fizzing. Hydrogen gas is produced. The reaction also produces the colorless solid sodium hydroxide, which is dissolved in the water. This reaction is exothermic, meaning it... 

When sodium interacts with the small amount of oxygen, Na20 oxide is produced, whereas its burning in the air results in Na202 peroxide ... 

When sodium interacts with water, some reactions occur and, depending on reaction temperature, impurities of different composition would be present in sodium. 

Thus, sodium-water interaction is rather complicated multistage process including successive reactions with sodium hydroxide and hydrogen formation followed by their interaction with sodium. The final concentration of water-sodium interaction products is determined by thermodynamic equilibrium conditions and the time of reaching equilibrium state in the course of the reaction. 

This feature, along with the fact that sodium interacts chemically with water and air, results in three circuit reactor power plant design, including ... 

This is the method applied in our study of the sodium interaction with half-decalcified parvalbumin. The alkali ion binds to the calcium-binding site of this muscular protein vacated by the Ca" " ion. The rate constants for the equilibrium (5j ... 

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