Carbon monoxide, ionization potential

The appearance potential of CO+ in the spectra of mononuclear carbonyls is similar to the ionization potential of carbon monoxide. This excludes a process... 

Rare gases, nitrogen, carbon monoxide and other gases with high ionization potential react by charge exchange ... 

Ionization potentials have also been used to study the heats of formation of odd-electron ions (open-shell systems). The loss of carbon monoxide from benzopyrone (2, equation 10) has been studied in relation to the fragment ion, C HeO, for which the geometry of molecules (3) and (4) was considered (Occolowitz and White, 1968). The excess energy term in reaction (10) was measured from the width of the peak corresponding... 

The question of enolization in butenolides remains a matter of some theoretical interest and recently, with the advent of lithiation and allied techniques, it has become more pointed. Scandinavian workers have determined the ionization potentials of certain butenolides and found them to lie at or above 9.6 eV a furan-2-ol would be expected to have much lower IP of about 8.4 eV and since no peak was noted in this region it follows that the butenolides are not appreciably enolized in the gas phase.75 At high temperatures (near 500°C) butenolides suffer cheletropic elimination of carbon monoxide giving vinylic ketones in good yield—again ends play no part.76... 

Extensive ion yield spectra, mass spectra, and ion-ion coincidence data have been acquired for carbon monoxide at both the carbon and oxygen K ionization edges. Dissociative multiple ionization efficiencies, ion branching ratios, and kinetic energy distributions were derived. The results were related to electron energy spectra and potential energy curves for states of (Hitchcock et al. 1988). 

The carbon monoxide molecule is isoelectronic and isobaric with the nitrogen molecule, and has a very small dipole moment. The densities of the solid forms of the two are nearly the same. Assuming that they have the same crystal structure, calculate a value of the binding energy of solid carbon monoxide from that of nitrogen (Table 4.1) for comparison with the experimental value 2 09 kcal per mole. The polarizability of a CO molecule is 2-21 x 10" 40 F m2,and its ionization potential is 329 kcal per mole. 

The flame ionization detector works by measuring the current in a flame (into which the gas to be analyzed is passed) across which a potential difference of 200-400 V is applied by means of platinum electrodes. This sensor is not temperature sensitive and is capable of measuring very low concentrations. However, its primary usefulness is in detecting organic carbon atoms, and it is not suitable for hydrogen/water vapor, carbon monoxide/carbon dioxide, or oxygen/sulfur dioxide mixtures. Calibration is required for each gas mixture. 

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