McGrath, Sara C.

Roesner, Faculty Advisor, Rebecca A.

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Illinois Wesleyan UniversityDigital Commons @ IWUJohn Wesley Powell Student ResearchConference 1998, 9th Annual JWP ConferenceApr 18th, 9:00 AM - 10:30 AMSubstitution Chemistry of the Hexamolybdate Ion:The Development of Reactions for RotaxanePreparationSara C. McGrathIllinois Wesleyan UniversityRebecca A. Roesner, Faculty AdvisorIllinois Wesleyan UniversityFollow this and additional works at: http://digitalcommons.iwu.edu/jwprcThis Event is brought to you for free and open access by The Ames Library, the Andrew W. Mellon Center for Curricular and FacultyDevelopment, the Office of the Provost and the Office of the President. It has been accepted for inclusion in Digital Commons @ IWU bythe faculty at Illinois Wesleyan University. For more information, please contact digitalcommons@iwu.edu.©Copyright is owned by the author of this document.Sara C. McGrath and Rebecca A. Roesner, Faculty Advisor, "Substitution Chemistry of the Hexamolybdate Ion: TheDevelopment of Reactions for Rotaxane Preparation" (April 18, 1998). John Wesley Powell Student Research Conference.Paper 14.http://digitalcommons.iwu.edu/jwprc/1998/posters/14THE JOHN WESLEY POWELL STUDENT RESEARCH CONFERENCE " APRIL 1998 Poster Presentation 14 SUBSTITUTION CHEMISTRY OF THE HEXAMOLYBDATE ION: THE DEVELOPMENT OF REACTIONS FOR ROTAXANE PREPARATION Sara C. McGrath and Rebecca A. Roesner* Department of Chemistry, lllinois Wesleyan University Much interest has been generated lately in the synthesis of new materials to be used in the construction of molecular scale electronic devices and machinery. Rotaxanes have surfaced as potential building blocks for designing such structures. The simplest rotaxanes are dumbbell-shaped molecules consisting of a long chain linker unit threaded, non-covalently, through a ring-shaped unit and stoppered on each end with a large, bulky group. (Fig. 1) The object of this study is to synthesize a simple rotaxane, using various bifunctional organic molecules as the chain unit, a b-cyclodextrin molecule as the ring unit, and hexamolybdate ions as the stoppering groups. IR and IH NMR analyses indicate that the hexamolybdate ion has been successfully synthesized from N�Mo04 and (n-C4H9)4NBr (Inorganic Syntheses). The main focus of this project is to explore the substitution reactions between the hexamolybdate ion and various aromatic amines, and, by analogy, to understand the chemistry of the substitution reactions between the hexamolybdate ion and the potential rotaxane linkers. There has been some preliminary success with the substitution of p-anisidine and l,4-phenylenediamine onto the hexamolybdate ion, using high pressure sealed tube reactions at elevated temperatures. Analyses performed using 1 H NMR and F AB-MS suggest that the aromatic molecules have been successfully substituted onto the hexamolybdate ion. (Fig. 2) Fig. 1 2-Fig. 2 

Substitution Chemistry of the Hexamolybdate Ion: The Development of Reactions for Rotaxane Preparation

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Substitution Chemistry of the Hexamolybdate Ion: The Development of Reactions for Rotaxane Preparation

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