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Química Nova

Print version ISSN 0100-4042On-line version ISSN 1678-7064


FARIAS, Robson Fernandes de. Lattice enthalpies (DMHmº) of adducts using an empirical equation supported in tg data. Quím. Nova [online]. 1997, vol.20, n.5, pp.478-480. ISSN 0100-4042.

An empirical equation: DMHmº = ti/b (where ti is the Kelvin temperature of the beginning of the thermal decomposition obtained from the thermogravimetry of the adducts; b is an empirical parameter wich depends on the metal halide and on the number of ligands) was obtained and tested for 53 adducts MX2.nL (where MX2 is a metal halide from the zinc group). The difference between experimental and calculated values was less than 6% for 22 adducts. To another 22 adducts, that difference was less than 10%. Only for 4 compounds the difference between experimental and calculated values exceeds 15%.

Keywords : adducts; lattice enthalpy; thermogravimetry; empirical equation.

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