The product rotational alignment of Ca(P-1(1)) with CnH2n+1Br (n = 1, 2, 3) for different initial Ca(P-1(1)) electronic orbital alignment is probed by means of laser-induced chemiluminescence in beam-gas apparatus. And the product rotational alignment of these reactions is calculated with an extended direct interaction with product repulsion (DIPR) model. The effects of the magnitude of the repulsive energy and the reagent approach geometry on the title reactions are also studied
