Period-mass diagram comparing the enrichment of binary models initialized at synchronization to those of single-star models with identical initial conditions. The green (magenta) color is used for models with Δ > 0 (Δ < 0). A symmetric colorbar is used to illustrate the magnitude of the difference in enrichment. Models with Δ ∼ 0 appear in white. Left panels: Hydro models. Right panels: Magnetic models. Upper panels: Nitrogen enrichment. Lower panels: Helium enrichment. Systems overfilling their RL at ZAMS are represented by gray crosses.