Analysis of the Infrared Spectra of Diatomic Molecules

William F. Polik
Department of Chemistry, Hope College, Holland, MI 49423
Richard W. Schwenz
Department of Chemistry and Biochemistry, University of Northern Colorado, Greeley, CO 80639
J. Chem. Educ., 1999, 76 (9), p 1302
DOI: 10.1021/ed076p1302
Publication Date (Web): September 1, 1999

Abstract

The infrared spectrum of a heteronuclear diatomic molecule is acquired and analyzed in almost every undergraduate physical chemistry laboratory. Traditional data analyses can be frustrating to students because of the repetitive calculations, the graph production, and indirect method of obtaining molecular constants. This paper describes an improved data analysis method using the multiple linear regression feature of a spreadsheet program. This method dramatically simplifies the effort of data reduction, provides a more direct connection between experimental data and molecular constants, and yields results that are more accurate and precise than traditional methods.

Keywords (Audience):

Upper-Division Undergraduate

Keywords (Domain):

Physical Chemistry

Keywords (Subject):

IR Spectroscopy
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History

  • Received: August 03, 2009

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