Paramagnetic gases

R. E. Turner, and R. F. Snider, and D. G. Fleming, Phys. Rev., A41, 1505 (1990). Spin Relaxation of Hydrogen-Atom Isotopes via Electron Spin Exchange with Paramagnetic Gases. 

Various different applications of the conductivity properties of the DCNQI salts have been suggested [13]. The very rapid change in microwave reflectivity with light-induced phase transformations in partially-deuterated [2,5-DMe-DCNQI]2 Cu alloys can be used for fast microwave switching [20]. Thin films of special DCNQI salts can be used as sensors for paramagnetic gases such as O2 and NO [21]. AppH-cations in electrophotography have also been discussed. 

One of the earliest properties of xenon studied by NMR was the gas-phase relaxation, which had been investigated in a detail as early as 1961. Xenon was observed to have a T relaxation time that is inversely dependent on the pressure, indicating the presence of a strong spin-rotation interaction. " Detailed studies of xenon relaxation in the presence of paramagnetic gases has been studied in detail by the Jamesons. 

Colourless paramagnetic gas (bp -151.8°) liquid and solid are also colourless when pure... 

Nitric oxide is a colourless, monomeric, paramagnetic gas with a low mp and bp (Table 11.9). It is thermodynamically unstable and decomposes into its elements at elevated temperatures (1100-1200°C), a fact which militates against its direct synthesis from N2 and O2. At high pressures and moderate temperatures... 

CIO2 a yellow paramagnetic gas (deep-red paramagnetic liquid and solid) discovered in 1811 by H. Davy the liquid explodes above —40° and the gas at room temperature may explode at pressures greater than 50 mmHg (6.7 kPa) despite this more than half a million tonnes are made for industrial use each year in North America alone. 

According to Lewis s approach and valence-bond theory, we should describe the bonding in 02 as having all the electrons paired. However, oxygen is a paramagnetic gas (Fig. 3.24 and Box 3.2), and paramagnetism is a property of unpaired electrons. The paramagnetism of 02 therefore contradicts both the Lewis structure and the valence-bond description of the molecule. 

NO2 Nitrogen dioxide 134° Brown, paramagnetic gas exists in equilibrium with N204 2N02 N2O4... 

Nitric oxide, NO, is a colourless paramagnetic gas, having one odd electron in an antibonding n orbital. This is consistent with the fact that NO+ (NO with the odd electron removed) has a shorter and stronger bond. Dulmage, Meyers and Lipscomb (1953) found the solid to be composed of rectangular dimers with the dimensions indicated, although the X-ray evidence did not... 

Host-guest complexes formed upon reversible reaction between NO2 and simple calix[4]arenes were also studied (72). Nitrogen dioxide (NO2) is a paramagnetic gas of an intense brown-orange color. It exists in equilibrium... 

Fridovich, I. Superoxide dismutases An adaptation to a paramagnetic gas. J. Biol. Chem. 264... 

Orange-brown, paramagnetic gas formed during HNO3 manufacture poisonous air pollutant... 

Consider the following information about the yellow-orange paramagnetic gas, cl, which is an oxide of chlorine. 

Kovacich P, Martin N, Clift M, Stocks C, Gaskin I, Hobby J (2006) Highly accurate measurement of oxygen using a paramagnetic gas sensw. Meas Sci Technol 17 1579-1585... 

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