Abstract
Free energies of adsorption Δ G ° of several heterocyclic and aromatic bases and their conjugate ionic acids have been evaluated from the adsorption isotherms reported in Part I. Hydration effects are calculated and the role of π-orbital interactions with the electron-deficient metal surface on the positive branch of the electrocapillary curve is discussed. Energies of π-orbital interaction of hydrocarbons with the mercury electrode are estimated from previous work and compared with the free energies of adsorption calculated for the organic ions. Ionic interaction effects in the surface layer are investigated by evaluating Δ G ° as a function of surface coverage θ. Deviations from an expected linear relation between Δ G ° and θ 1 2 are found, and are consistent with Van der Waals attractive forces treated by other authors. Changes of the potential of electrocapillary maximum have been evaluated and appear to be related to the degree of interaction of the ions of the bases with the mercury surface through π-bonding in a way similar to that discussed in Part I for adsorption of the corresponding neutral bases.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
