Simultaneous Introduction of Redox and Coordination Chemistry Concepts in a Single Laboratory Experiment

作者：Ferko Philip J; Withers Jeffrey R; Hung Nguyen; Ema Joshua; Ema Tim; Allison Charles; Dornhoefer Christian; Rath Nigam P; Holmes Stephen M^*

来源：Journal of Chemical Education, 2017, 94(1): 95-100.

DOI：10.1021/acs.jchemed.6b00256

• Laboratory Instruction
• Hands-On Learning/Manipulatives
• High School/Introductory Chemistry
• First-Year Undergraduate/General
• Upper-Division Undergraduate
• Inorganic Chemistry
• Inquiry-Based/Discovery Learning
• Aqueous Solution Chemistry
• Coordination Compounds
• Crystal Field/Ligand Field Theory

The preparation of two crystalline binary transition metal p-toluenesulfonate salts of [M-II(OH2)(6)][OTs](2) stoichiometry, where Mil = Co (1) and Ni (2), is described. Their syntheses are accomplished via an oxidation reduction reaction using metal powders and aqueous ptoluenesulfonic acid hydrate as the reducing and oxidizing reagents, respectively. Over the span of one 4 h session, students learn concepts that include reaction stoichiometry, relative rates, complexation, crystal growth and isolation, and fractional crystallization methods. A second session allows for the origins of color and spectroscopy (UV vis and infrared) to be investigated by more advanced students. Suitably equipped laboratories may also pursue independent student projects involving additional microscopy, X-ray solution and refinement, and magnetic susceptibility exercises.

• 出版日期2017-1