Chemical profiles of carbon isotopic ratio as a function of coordinate in mass (M_r/M_⊙) at the turn-off of the 1.5 M_⊙ star computed with different initial rotation velocities. The black solid, red dashed, and blue dot-dashed lines represent standard models, models including rotation with V_ZAMS = 50 km s^-1, and 110 km s^-1, respectively. The vertical lines show, in all cases, the maximum depth reached by the convective envelope at its maximum extent during the first dredge-up, while the horizontal lines indicate the surface values of ¹²C/¹³C at the end of the first dredge-up.