Gas-phase thermochemical values £>°(Mg+-OH) = 75 ± 4 kcal/mol, IP(MgOH) = 7.3 ± 0.1 eV, D°(Mg+-0) = 53 ± 3 kcal/mol, and IP(MgO) = 7.9 ±0.1 eV have been experimentally determined by photodissociation measurements and charge-transfer reactions with Fourier transform mass spectrometry. These results, together with previously determined thermochemical data, are used to determine other thermochemical properties of MgOH and MgO. Our value Z)°(Mg-OH) = 67 ± 6 kcal/mol agrees well with previous experimental values. However, £>°(Mg-0) = 59 ± 5 kcal/mol is much lower than previous experimental results, which vary widely, but is in good agreement with a recent ab initio Cl calculation.The thermochemical properties of gas-phase metal monohydroxides have recently been of interest due to the roles these species play in flame chemistry1 and meteor ablation processes.2Most of the bond dissociation energies of the neutral species have come from flame measurements.3 4More recent measurements from Knudsen cell mass spectrometry,4-6 however, have indicated that some of the results reported earlier may be high by as much

No abstract

No abstract

No abstract

ChemInform Abstract (of 12 simple organic molecules (R-OH with R: -Me, -Et, -Pr, -iPr, -Bu; R-CHO with R: -Me, -Et, -Pr; Et2O; THF, acetone, Me-CO-Et); determined by four different methods).