The wavepacket dynamics in the full reaction of CF 3 H + Ar( 3 P) -> CF 3 * + H + Ar was simulated by solving a coupled time-dependent Schrodinger equation for the CF 3 -end and the H-end orientations. A clear interference feature for the density current in the dissociation process has been confirmed only when the Ar( 3 P) atom attacks at the H-end of the molecule, which could be regarded as a one atom cage effect in full scattering. The total reaction probability for the CF 3 -end orientation was calculated to be about 10 4 times more preferable than that for the H-end orientation with good agreement with experiment.