A Multiweek Upper-Division Inorganic Laboratory Based on Metallacrowns

Abstract

Metallacrowns are a versatile class of inorganic compounds with uses in several areas of chemistry. Students engage in a multiweek, upperdivision inorganic laboratory that explores four different metallacrown compounds:The syntheses are straightforward, and the compounds are characterized by cyclic voltammetry, solid-state magnetic susceptibility, FT-IR, UV−vis, and paramagnetically shifted 1 H NMR. Students are provided with a research-like experience in which they can successfully synthesize a metallacrown, conduct a literature search, develop characterization parameters based on departmental resources, interpret experimental results and compare them to the primary literature, analyze the crystallographic structures of the compounds, and finally present an oral seminar detailing their results and analysis.

The Heteronuclear Single-Quantum Correlation (HSQC) Experiment: Vectors versus Product Operators

“…Nuclear magnetic resonance (NMR) is a core educational issue in chemistry. Many papers have been published in the educational literature dealing with NMR for structure elucidation, − reviews of books and media, , and other practical applications. − However, very few deal with the theory behind spin evolution, , which is ultimately responsible for the appearance of NMR spectra.…”