“…Self-assembled monolayers (SAMs) are widely used to fabricate surfaces and interfaces with defined compositions, structures, and thicknesses. − Due to their ability to control interfacial structure at molecular scales, SAMs have significant implications in fundamental and technological studies. ,− Interestingly, properties of n -alkanethiolate SAMs depend on whether the molecule has odd or even number of methylene units (carbons in the n -alkanethiols). ,,,,− This odd–even effect manifests as zigzag alternations in chemical, physical, and interface properties in areas like electronic properties, friction behavior, hydrophobicity, and electrochemical properties. ,,− We, ,, and others, ,, are interested in understanding odd–even effect in wetting properties of n -alkanethiolate SAMs to further inform applications of these foundational platform/technologies. This work is part of a series ,− aimed at informing design and developments in SAM-based technologies like molecular tunneling junctions, field-effect transistors, molecular diodes, bioanalytical devices, and surface coating, among many others. ,,,,,− As previously discussed and for simplicity, brevity, and clarity, we utilize static contact anglesa representation of the equilibrium state between the surface and wetting liquid that avoids complexity that may arise from other measurements like advancing ...…”