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Blue Bottle, Red and Blue Bottle Color changes are caused by reactions of oxygen in the air with chemicals in a solution. The colors fade over time, but can be regenerated by shaking the flask containing the solution.
Kinetics |
Mechanisms of Reactions |
Oxidation / Reduction
Induction by Iron(II) of the Oxidation of Iodide by Dichromate Acidic aqueous solutions containing dichromate and iodide ions are mixed with no reaction. The addition of a solution of iron(II) ion induces the rapid formation of brown triiodide ion.
Acid-Catalyzed Enolization of β-TetraloneBrahmadeo Dewprashad, Anthony Nesturi, and Joel Urena This experiment allows students to use 1H NMR to compare the rates of substitution of benzylic and non-benzylic a hydrogens of -tetralone and correlate their findings with predictions made by resonance theory. Dewprashad, Brahmadeo; Nesturi, Anthony; Urena, Joel. J. Chem. Educ.2008, 85, 829.
Aldehydes / Ketones |
Isotopes |
Mechanisms of Reactions |
NMR Spectroscopy |
Reactive Intermediates |
Resonance Theory |
Synthesis
Probing the Rate-Determining Step of the Claisen–Schmidt Condensation by Competition ReactionsKendrew K. W. Mak, Wing-Fat Chan, Ka-Ying Lung, Wai-Yee Lam, Weng-Cheong Ng, and Siu-Fung Lee This article describes a physical organic experiment to identify the rate-determining step of the ClaisenSchmidt condensation of benzaldehyde and acetophenone by studying the linear free energy relationship. Mak, Kendrew K. W.; Chan, Wing-Fat; Lung, Ka-Ying; Lam, Wai-Yee; Ng, Weng-Cheong; Lee, Siu-Fung. J. Chem. Educ.2007, 84, 1819.
Aldehydes / Ketones |
Aromatic Compounds |
Gas Chromatography |
Kinetics |
Mechanisms of Reactions |
Synthesis
A Knoevenagel Initiated Annulation Reaction Using Room Temperature or Microwave ConditionsA. Gilbert Cook The product of a Knoevenagel initiated annulation reaction is identified through a guided prelab exercise of the synthesis of the Hagemann ester, and then through the analysis of GCMS, NMR, and IR spectra. The stereochemistry of the product is determined through the NMR spectrum and Karplus curve, and the student is required to write a mechanism for the reaction. Cook, A. Gilbert. J. Chem. Educ.2007, 84, 1477.
