Oxygen displacement

Step 3 Carbon migrates from boron to oxygen displacing hydroxide ion Carbon migrates with the pair of electrons m the carbon-boron bond these become the electrons m the carbon-oxygen bond... 

Q An electron pair from oxygen displaces the leaving Y group, generating a new carbonyl compound as product. 

From the mechanistic viewpoint, a more informative structure is the complex of PLCBc with inorganic phosphate (Pi), which also inhibits the enzyme (50% inhibition at 50 mmol l1 Pi) [65]. In this complex, which was obtained at 2.1 A resolution, the three zinc ions were coordinated to the two non-bridging phosphate oxygens (Fig. 7 a). Comparison of this structure with the native one (Fig. 6) reveals that one of the non-bridging oxygens on the phosphate replaced the bridging water molecule between Znl and Zn3, while the other oxygen displaced one of the waters coordinated to Zn2. 

A water mist system is a proprietary fire protection system using very fine water sprays. The very small water droplets allow the water mist to control or extinguish fires by cooling of the flame and fire plume, oxygen displacement by water vapor, and radiant heat attenuation. These systems are single shot systems. A water mist system and nozzles are shown in Figure 7-28. 

Concentrations of less than 2.5% are physiologically inert at very high concentrations, there may be narcosis, unconsciousness, and asphyxia due to oxygen displacement. Humans exposed to as much as 50% ethylene in air, where the oxygen is decreased to 10%, may... 

Toxicology. Liquefied petroleum gas (LPG) is practically nontoxic below the explosive limits but may cause asphyxia by oxygen displacement at extremely high concentrations. ... 

Carbon monoxide Oxygen Displaces toxicant from hemoglobin... 

Figure 5.16 Willis clusters in UOj+y Open circles, oxygens small filled circles, uranium atoms in the UO2 structure. A 2 2 2 defect cluster consists of two interstitial oxygen atoms (large filled circles) and two normal oxygen atoms displaced from their ideal positions (open squares) to new interstitial positions (hatched circles). A 2 1 2 defect cluster would consist of one interstitial oxygen and two normal oxygens displaced from their ideal positions. (After Anderson, 19726.)...

In a similar way, oxygen displaces sulfur from many compounds on long-continued exposure to air. 

The x-ray difference map shows that the tetrahedral phosphorus binds in the pocket occupied by the carbonyl of a dipeptide and that one phosphorus oxygen binds to the Zn2+ while another oxygen displaces the water bound to glutamic-143. The proposed transition-state structure for the catalytic reaction is given in Fig. 4. 

An electron pair on one of the oxygens displaces the ammonium group from the molecule. 

Copper (I) iodide retains moisture tenaciously. The air-dried product contains ca. 4% water,8 while the drying procedure recommended reduces this to ca. 0.2%.7 9 The product may be dried overnight in a phosphorus(V) oxide drying pistol at 100°. When heated in air below 200°, oxygen displaces iodine, yielding copper(II) oxide. ... 

Treatment of the product with base (NaOH) gives an epoxide by another S>j2 reaction in which oxygen displaces bromide. This is again stereospecific and gives the epoxide on the same side as the groups R. 

Function Gas air and oxygen displacer propellant and aerating agent packaging gas Liquid direct-contact freezing agent. 

At manganese on centre II, see oxygen displace As water s split, and protons too, leave membrane inner face Electrons that we thus produce, cross, photo-fortified Plastoquinone then to reduce, upon the other side. 

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