Hydrogen bonding to xenon: A comparison with neon, argon and krypton complexes

► Δλ(AH) stretching vibration as analytical tool for study of A-H⋯Rg interactions. ► Different nature of A-H⋯Rg contacts of Rg = Xe, Ar, Kr, Ne. ► 129Xe chemical shift of A-H⋯Xe complexes as criterion of hydrogen bonding.