Adduct ion formation reactions and their decompositions

Hunt and Ryan [36] chose NO as the reagent gas for these reactions, which enabled them to characterize several classes of compounds (Table 1). 

The absence of [M-H] ions in the case of tertiary alcohols is consistent with the supposition that the extracted hydrogen was bound to the functionalized carbon, a situation which is also found for aldehydes. These are true oxidation reactions produced with NO.  

The use of ammonia generates other types of data. When the adduct ion [M + NH4] is stable the measurement of the ratio MH /M -t- NH4] gives direct access to the distinction between diastereomeric diols, for example, the cyclopentane and cyclohexane diols [37,38]. This behavior is due to slight variations of proton affinity, in these cases certainly resulting from the possibility of forming hydrogen bonds (Table 2). 

Behavior of oxygenated compounds in a high-pressure NO plasma [36] 

Partial NH4 /Cl mass spectra of diastereomer cyclohexane diols (1-3 and 1-4) [37] 

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