Energetics of 6-methoxyquinoline and 6-METHOXYQUINOLINE N-OXIDE (cas 6563-13-9): the dissociation enthalpy of the (N–O) bond

Add time:07/11/2019    Source:sciencedirect.com

The standard (po=0.1MPa) molar enthalpies of formation, at T=298.15K, were determined using static-bomb calorimetry for crystalline 6-methoxyquinoline N-oxide (6MeOQUINO), as −(85.6±3.7)kJ·mol−1 and liquid 6-methoxyquinoline (6MeOQUI), −(25.8±2.2)kJ·mol−1. The standard molar enthalpies of sublimation/vaporization, at T=298.15K, were measured by microcalorimetry and from the enthalpies of formation of the gaseous compounds, the dissociation enthalpy Dm0 of the (N+–O−) dative covalent bond was derived, as (269.2±5.0)kJ·mol−1.

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