Series of rare gas fluorides XeF2, XeF4, XeF6, KrF2, and RnF2 have been calculated by means of relativistic charge-consistent extended Hueckel program ITEREX. These relativistic effects are -72.91, -160.34, -281.82, -25.44, and -220.7 kJ.mol-1 resp.; they are all neg. and make the mols. stable. The relativistic effects of mols. IF and CsF are 10.68 and 5.416 kJ.mol-1, which make the mol. energies increase. The results of these calcns. prove that the relativistic effect plays an important role in bonding of rare gas compounds

Key words: COMPUTATIONAL METHOD, FLUORIDE, CESIUM COMPOUNDS, CARBON COMPOUNDS, RELATIVISTIC EFFECTS, RARE GAS COMPOUND