Mass spectrometric study of the thermochemical properties of gaseous MgOH

D⁰₀(Mg-OH) has been measured in a high temperature mass spectrometer and found to be 73.5 ± 5 $\text{kcal}\text{mol}$ (3.19 ± 0.22 eV). The dissociation energies of the monohydroxides and monochlorides of Mg and Ba are compared.