  Water is the most anomalous material on Earth, with a long list of
thermodynamic, dynamic and structural behavior that deviate from the expected.
Recent studies indicate that the anomalies can be related to a competition
between two liquids, which means that water has a potential liquid-liquid phase
transition (LLPT) that ends in a liquid-liquid critical point (LLCP). In a
recent work [J. Mol. Liq. 320 (2020) 114420], using molecular dynamics
simulations and a core-softened potential approach, we have shown that adding a
simple solute as methanol can "kill" the anomalous behavior as the LLCP is
suppressed by the spontaneous crystallization in a hexagonal closed packing
(HCP) crystal near the LLPT. Now, we extend this work to see how alcohols with
longer chains will affect the complex behavior of water mixtures in the
supercooled regime. Besides CS methanol, ethanol and 1-propanol were added to
CS water. We observed that the anomaly vanishes as the alcohol chain increases.
Curiously, the LLCP did not vanishes together with the anomalous behavior. The
reason is that the mechanism for ethanol and 1-propanol is distinct to the one
observed previously for methanol: here, the longer chains affect the
competition between the scales in the CS potential. Also, the chain size
affects the solid phases, favoring the HCP solid and the amorphous solid phase
over the body-centered cubic (BCC) crystal. This findings helps to elucidate
the behavior of water solutions in the supercooled regime, and indicates that
the LLCP can be observed in systems without anomalous behavior.
