ERIC Number: EJ1067436
Record Type: Journal
Publication Date: 2015-Jun
Abstractor: As Provided
Reference Count: 18
Vibrational Spectroscopy of the CCl[subscript 4] v[subscript 1] Mode: Theoretical Prediction of Isotopic Effects
Gaynor, James D.; Wetterer, Anna M.; Cochran, Rea M.; Valente, Edward J.; Mayer, Steven G.
Journal of Chemical Education, v92 n6 p1081-1085 Jun 2015
Raman spectroscopy is a powerful experimental technique, yet it is often missing from the undergraduate physical chemistry laboratory curriculum. Tetrachloromethane (CCl[subscript 4]) is the ideal molecule for an introductory vibrational spectroscopy experiment and the symmetric stretch vibration contains fine structure due to isotopic variations of the molecule according to C[superscript 35]Cl[subscript x][superscript 37]Cl[subscript 4-x]. We report simple theoretical predictions of the fine structure, calculation of Raman differential scattering cross sections, and discussion of the inherent asymmetry in the v[subscript 1] mode resulting from the different isotopes of chlorine. All calculations and discussion are appropriate for an undergraduate physical chemistry laboratory as either an independent dry lab or a supplement to a pre-existing vibrational spectroscopy lab.
Descriptors: Spectroscopy, Prediction, Chemistry, Laboratory Experiments, Undergraduate Students, Molecular Structure, Quantum Mechanics, Hands on Science, Computation, Laboratory Safety, Laboratory Procedures, Teaching Methods, Educational Practices, Scientific Concepts, Scientific Methodology, Scientific Principles
Division of Chemical Education, Inc and ACS Publications Division of the American Chemical Society. 1155 Sixteenth Street NW, Washington, DC 20036. Tel: 800-227-5558; Tel: 202-872-4600; e-mail: firstname.lastname@example.org; Web site: http://pubs.acs.org/jchemeduc
Publication Type: Journal Articles; Reports - Research
Education Level: Higher Education; Postsecondary Education
Sponsor: National Science Foundation (NSF)
Authoring Institution: N/A
IES Grant or Contract Numbers: 0618973