Resonance experiment, ion cyclotron

Bromonium ion stabilities in the gas phase have also been measured in ion cyclotron resonance experiments by Beauchamp s group (Staley et al, 1977). The heterolytic bond dissociation energies shown in Table 3 are taken as a... 

Another exciting possibility for high sensitivity molecular surface mass spectrometry is the use of laser-excited ion desorption in a pulsed ion cyclotron resonance experiment using Fourier transform techniques. In an ideal situation, this scheme could include all those attributes which are desirable for solid-surface molecular characterization ... 

Accurate measurements of the electron affinity of simple Ge and Sn radicals have been obtained by threshold photodetachment experiments carried out in ion cyclotron resonance experiments . In these experiments, measurement of the threshold frequency for removing the electron from the anion yields an upper limit for the electron affinity of the species, as shown for GeH3 in equation 28. 

As noted previously, ion chemistry experiments can also give information about the thermochemistry of neutral molecules. Through judicious use of ion cyclotron resonance experiments , a 0 K bond energy for Me—Au equal to 207 15 kJmoP has been found. From the subhmation enthalpy of gold (—366 kJ mol ), we find reaction 24 is exothermic by ca 159 kJ mol essentially identical to that for the corresponding reaction for silver. 

Ion cyclotron resonance experiments have also shown that positively charged ions are more active than neutral atoms, e.g.,... 

A detailed comparison of the results of tandem measurements with single-source and ion cyclotron resonance experiments uncovered significant discrepancies which required further elucidation. For example, the ratio of products C3H4C1 /C4H5C1 was found to be 13 1 by tandem measurements, while the ratio is 1.2 1 in single-stage mass spectrometer... 

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