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An Experimental and Theoretical Investigation of the Excited States of Isobutene

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Date Issued:
2016
Summary:
Vacuum ultraviolet magnetic circular dichroism (MCD) and absorption spectra of isobutene were obtained experimentally and compared to theoretical data (DFT calculation with Gaussian software) with the goal of better understanding the electronic structure of simple olefins. MCD is the differential absorption of left and right circular polarized light in the presence of an external magnetic field. This means that a MCD spectrum contains both positive and negative peaks while an absorbance spectrum contains only positive peaks. MCD is useful when used in conjunction with a corresponding absorbance spectrum to assign spectral bands that may have been hidden by overlap in the absorbance spectrum. The experimental and theoretical results coincide with the two lowest energy transitions of isobutene being assigned as [...]. This is also consistent with what has been observed in ethylene and propylene, π→π^* is not the lowest transition in mono-olefins.
Title: An Experimental and Theoretical Investigation of the Excited States of Isobutene.
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Name(s): McLachlan, Jeffrey
Snyder, Patricia Ann
Office of Undergraduate Research and Inquiry
Type of Resource: text
Genre: Poster
Date Created: 2016
Date Issued: 2016
Publisher: Florida Atlantic University
Place of Publication: Boca Raton, Florida
Physical Form: application/pdf
Extent: 1 p.
Language(s): English
Summary: Vacuum ultraviolet magnetic circular dichroism (MCD) and absorption spectra of isobutene were obtained experimentally and compared to theoretical data (DFT calculation with Gaussian software) with the goal of better understanding the electronic structure of simple olefins. MCD is the differential absorption of left and right circular polarized light in the presence of an external magnetic field. This means that a MCD spectrum contains both positive and negative peaks while an absorbance spectrum contains only positive peaks. MCD is useful when used in conjunction with a corresponding absorbance spectrum to assign spectral bands that may have been hidden by overlap in the absorbance spectrum. The experimental and theoretical results coincide with the two lowest energy transitions of isobutene being assigned as [...]. This is also consistent with what has been observed in ethylene and propylene, π→π^* is not the lowest transition in mono-olefins.
Identifier: FA00005589 (IID)
Subject(s): College students --Research --United States.
Held by: Florida Atlantic University Libraries
Sublocation: Digital Library
Persistent Link to This Record: http://purl.flvc.org/fau/fd/FA00005589
Restrictions on Access: Author retains rights.
Host Institution: FAU