The surface of aqueous solutions of benzo-15-crown-5 (B15C5) and Nitro Benzo-15-Crown-5 (NB15C5) have been studied using the surface sensitive technique vibrational sum frequency spectroscopy (VSFS). The orientation of the interfacial molecules as well as the hydration and temperature dependency have been studied. This has been achieved through targeting NO, CN, COC and CH vibrational modes of these compounds as well as OH vibrational modes of the surface water hydrating these compounds. The NB15C5 did not change its orientation at the interface over the concentration range studied. CH2 vibrational modes for crown ethers have been identified for the first time using VSFS and a model for hydrating the B15C5 and NB15C5 was proposed.