Abstract
Summary A semi-quantitative method is described for chromatography of fluorescent polynuclear aromatic hydrocarbons and aromatic nitrogen heterocycles on alumina-impregnated glass paper. Combining data obtained from such papers with those from alumina columns it is noted that the isomeric azobenzenes and nitrogen heterocycles are more strongly adsorbed than their hydrocarbon analogs (where CH replaces N). It is proposed that adsorption of such nitrogen compounds occurs preferentially by means of the electron pairs on the nitrogen atoms to form n-complexes. If steric hindrance to n-complexation is too great the substrate may form a π-complex or a πn-hybrid complex instead.
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.
