An η 1 η 5 -rhenium complex has been prepared, starting from a CpRe(CO) 3 complex substituted with a pendant aromatic amine. This unique complex has potential application as a surrogate for a technetium-99m complex, a common radioisotope for biomedical imaging applications. Chelation occurred via photochemical decarbonylation of the rhenium, which opened a binding-site for the aromatic amine.

The synthesis of N-methoxycarbonyl-2-imidazolidone, an analogue of biotin, was conducted by organic chemistry students and confirmed using FT-IR and 1H NMR. Spectroscopy students used FT-IR to measure the rate of hydrolysis of the product and determined the rate constant for the reaction using the integrated rate law. From the magnitude of the rate constant, the reaction was found to be activation limited. A student survey was conducted, which showed the laboratory experiment to be a positive learning experience.

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Public reporting burden for this collection of information is estimated to average 1 hour per response, including the time for reviewing instructions, searching existing data sources, gathering and maintaining the data needed, and completing and reviewing this collection of information. Send comments regarding this burden estimate or any other aspect of this collection of information, including suggestions for reducing this burden to Washington Headquarters Services, Directorate