Mdmcr. Da Silva et al., Enthalpies of combustion of 2-iodosobenzoic acid and 4-nitrosophenol: the dissociation enthalpy of the I-O bond, J CHEM THER, 31(12), 1999, pp. 1551-1559
The standard (p(o) = 0.1 MPa) molar enthalpies of combustion in oxygen, at
T = 298.15 K, for crystalline 2-iodosobenzoic acid, (OI)C6H4COOH, and 4-nit
rosophenol, (ON)C6H4OH, were measured by rotating-bomb calorimetry and stat
ic-bomb calorimetry, respectively. These values were used to derive the sta
ndard molar enthalpies of formation of the crystalline compounds.
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An indirect method was used for assessing the dissociation enthalpy of the
(I-O) bond in the iodoso derivative, D-m(o)(I-O)/(kJ . mol(-1)) = (264.5 +/
- 8.1), which is the first value reported for an iodine-oxygen bond in an o
rganic molecule. (C) 1999 Academic Press.