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The Synthesis, Characterization, and Lewis Acidity of SnI2 and SnI4

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Carolyn S. Yoder and Stephanie Shenk

Department of Chemistry, Millersville University, Millersville, PA 17551

Richard W. Schaeffer , Benny Chan , Michael Molinaro , Susan Morissey and Claude H. Yoder

Department of Chemistry, Franklin and Marshall College, Lancaster, PA 17604

J. Chem. Educ., 1997, 74 (5), p 575

DOI: 10.1021/ed074p575

Publication Date (Web): May 1, 1997

Abstract

An exploration of synthesis of SnI₂ and SnI₄ teaches the student not only about one of the principal provinces of the chemist, but also provides the opportunity to learn about a variety of laboratory procedures and methodologies. In this project the student has the opportunity to learn about: a) the direct synthesis of compounds from the elements, b) stoichiometry and limiting reagent, c) isolation by recrystallization, d) use of inert atmosphere, e) identification by melting point, gravimetric analysis, powder x-ray diffraction, and NMR spectroscopy, and f) at least one method for determination of relative Lewis acidity. The broad scope of the project makes it ideal for a multi-week project in the introductory course or in an upper-level course such as Inorganic Chemistry. It can also be adapted to more individual learning experiences where, for example, a student might be asked to explore a particular synthesis of SnI₄, another might synthesize SnI₂, others might pursue methods to analyze the compounds, to convert one to the other, to determine their Lewis acidity, and so on.

Keywords (Audience):

Second-Year Undergraduate

Keywords (Domain):

Inorganic Chemistry

Keywords (Pedagogy):

Hands-On Learning / Manipulatives

Keywords (Subject):

Acids / Bases

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