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Orvis, Jeffery A. 4 0

Studying a ligand substitution reaction with variable temperature H NMR spectroscopy. 6 6 - - - - - - - - . - . - 0 . - . - 0 .

ABSTRACT : The study of ligand substitution reactions of transition metal complexes is often a significant component of undergraduate courses in inorganic chemistry. In the laboratory, many undergraduates have studied the aquation of [Co(NH3)5Cl]2+at elevated temperatures, taking aliquots of the reaction mixture, and obtaining a series of UV-vis spectra. Recently, an improved synthesis of a similar complex, trans-[Co(NH3)4Cl2]+ was reported. This complex undergoes aquation in less than an hour at room temperature, much faster than [Co(NH3)5Cl]2+, and is readily monitored by 1H NMR spectroscopy. This reaction forms the basis of an instructive, multi-week laboratory experience in inorganic synthesis, followed by an analysis of a reaction mechanism using a classical activation parameter determination.





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Chemistry, inorganic;Cobalt compounds.;Nuclear magnetic resonance spectroscopy. ----Study and teaching.----20--

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LC Class. No.: QD1 .J826ce / 2

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