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  Home > JCE Print > Journal of Chemical Education > Issues > 2008  > November  >
In the Laboratory
Synthesis and Base Hydrolysis of a Cobalt(III) Complex Coordinated by a Thioether Ligand
Lee Roecker
Department of Chemistry, Gettysburg College, Gettysburg, PA 17325 and Department of Chemistry, Berea College, Berea, KY 40404
Cover
November 2008
Vol. 85 No. 11
p. 1562

Abstract
A two-week laboratory experiment for students in advanced inorganic chemistry is described. Students prepare and characterize a cobalt(III) complex coordinated by a thioether ligand during the first week of the experiment and then study the kinetics of Co–S bond cleavage in basic solution during the second week. The synthetic portion of the laboratory is a good introduction to the preparation of inert transition-metal complexes and the modification of coordinated ligands. The kinetic portion of the laboratory introduces students to the SN1CB base hydrolysis mechanism and to the analysis of kinetic data.
Supplement
Instructions for students; Notes for instructors including possible modifications
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Citation
Roecker, Lee. J. Chem. Educ. 2008, 85, 1562.
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Keywords
Cobalt; Coordination Compounds; Hands-On Learning / Manipulatives; Inorganic Chemistry; Kinetics; Laboratory Instruction; Nucleophilic Substitution; Reactions; Synthesis; Upper-Division Undergraduate; UV-Vis Spectroscopy
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History
Created:
Last Updated:
9/19/2008
9/25/2008
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Experiments, laboratory exercises, lecture demonstrations, and other descriptions of the use of chemicals, apparatus, instruments, computers, and computer interfaces are presented in the Journal of Chemical Education as illustrative of new or improved ideas or concepts in chemistry instruction and are directed at qualified teachers. Although every effort is made to assure and encourage safe practices and safe use of chemicals, the Journal of Chemical Education cannot assume responsibility for uses made of its published materials. Many chemicals are hazardous. Precautions for the safe use of hazardous chemicals and directions for their proper disposal are described in the Material Safety Data Sheets and on the labels. We strongly urge all those planning to use materials from our pages to make choices and to develop procedures for laboratory and classroom safety in accordance with local needs and situations.
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