Oxides, bond energies

Both atomic and metal oxide ions were observed in initial investigations. Ions with low metal oxide or hydroxide bond energies resulted in the detection of only the bare metal ions. For elements with strong oxide bond energies, metal oxides were observed. By utilizing the preselection capability of the linear quadrupole, it was determined that the metal oxides were not originating from the ion... 

Griffin JB, Armentrout PB (1997) Guided ion-beam studies of the reactions of Fe < > (n= 1-18) with CO Iron cluster oxide bond energies. J Chem Phys 107 5345... 

Figure 1. Field required to sustain an ionic current density of 2 X 10 A cm for anodic oxides as function of metal-oxide bond energy (1)...

Halides. Xenon duorides, xenon oxide tetraduoride [13774-85-1XeOE, and their complexes are the only thermodynamically stable xenon compounds. Xenon diduo ride [13709-36-9] xenon tetraduoride [13709-61-0], and xenon hexaduoride [13693-09-9] are colodess, crystalline soHds which can be sublimed under vacuum at 25°C. The mean thermochemical bond energies are XeE2, 132.3 0.7 kJ/mol (31.6 0.2 kcal/mol) XeE ... 

The view has also existed in the past that the carbon-silicon bond should be similar in behaviour to the carbon-carbon bond and would have a similar average bond energy. There is some measure of truth in the assumption about average bond energy but because silicon is more electropositive than carbon the C—Si bond will be polar and its properties will be very dependent on the nature of groups attached to the carbon and silicon groups. For example, the CH3—Si group is particularly resistant to oxidation but H13—Si is not. 

Earlier studies of 4-aminopyridine 1-oxide were less conclusive. The solid-state infrared spectrum could be interpreted to indicate the existence of both the imino structure and/or, more probably, the amino structure. Comparison of the actual pKa value of 4-aminopyridine 1-oxide wdth the value calculated using the Hammett equation was considered to indicate that the compound existed as such or as an equilibrium mixture with l-hydroxypyrid-4-onimine, the latter possibility being considered the less likely on the basis of resonance and bond energies/ Resonance energy and ultraviolet spectral considerations have been advanced to support the 4-aminopyridine 1-oxide structure/ The presence of an infrared absorption band at... 

The reaction for the oxidation of sulphoxides by peracids in an alkaline medium is probably best described as shown in equation (16). Here the addition step is usually much slower than the latter step due to the low O—O bond energy which allows easy bond fission. For the reaction in acidic media, equation (17) is probably a good representation. 

Almost all living creatures require oxygen to act as the ultimate electron acceptor in a series of chemical reactions. In these, oxygen is reduced to the level of water and the bond energy of the substrates thus concommi-tandy oxidized is liberated. Oxygen is able to perform these functions because it can be progressively oxidized by successive one-electron additions, but it is this property that provides the basis for the toxicity associated... 

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